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1.
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... covered in the aircraft Wiring Practices Manual. Terminals are used extensively for aircraft frame (ground) connections and terminal strip interconnects. Splices are normally used for wire repair. The ...
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27 January 2016
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Working Wires
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2.
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An explanation of receiving/feeding ADS-B data to external aircraft tracking sites along with desktop streaming can be found here.
ADS-B Stream requires Flash ...
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23 November 2015
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Home Page
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3.
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Cincinnati ADS-B Feed to FR24, Plane Finder, & RadarBox
An explanation of receiving/feeding ADS-B data to external aircraft tracking sites along with desktop streaming can be found here. Fullscreen ...
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23 November 2015
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Home Page
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4.
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... PUROSE OF THIS SITE IS TO AID THE SITE'S READERS IN DETERMINING THE PROBLEM(S) ON AN AIRCRAFT AND NOT TO DIRECTLY AID YOU IN REPARING THE AIRCRAFT. REPAIRS ON AN AIRCRAFT SHOULD ONLY BE MADE USING APPROVED ...
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06 January 2015
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Uncategorised
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5.
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Transformer Troubleshooting
Many circuits on aircraft use step down transformers for control voltages. Typical user systems are lights and 28VAC position ...
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18 July 2014
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Troubleshooting
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6.
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... of information. As an example: a typical digital Air Data Computer will output labels 210 - True Airspeed, 215 - Impact Pressure, 242 - Total Pressure, plus more than 30 other labels related to the aircraft ...
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18 July 2014
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Troubleshooting
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7.
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Suppression Diode
The majority of relays installed on aircraft will have a diode installed in parallel with the relay coil. This diode is often ...
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18 July 2014
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Troubleshooting
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8.
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... cannot be rotated left/right after placement in the strip. If a good seat is not made, remove the tool and re-position before inserting again. If a tool is rotated, it will break. If any pieces are left ...
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17 July 2014
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Working Wires
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9.
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Rack Plugs
Rack plugs are used for LRU interface. There are many types and sizes for component connections. Rack plugs are similar to rear release plugs, ...
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17 July 2014
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Working Wires
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10.
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Rear Release Plugs
Rear release plugs are found on newer generation digital aircraft. They have proven to be reliable against moisture and chemicals. ...
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16 July 2014
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Working Wires
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11.
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Front Release Plugs
Front release plugs are found on older analog based aircraft. Newer generation applications use rear release plugs for most ...
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16 July 2014
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Working Wires
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12.
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... flow on both sides.
THE INFORMATION PRESENTED ON THIS SITE IS TO BE USED AS A GUIDE.
APPROVED AIRCRAFT MANUFACTURER MAINTENANCE MANUAL PROCEDURES SHOULD ALWAYS BE FOLLOWED. ...
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16 July 2014
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Working Wires
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13.
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Volt/Ohm Meter
All modern digital meters are capable of many functions. The majority of aircraft avionics/electrical systems troubleshooting is accomplished ...
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15 July 2014
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Test Equipment
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14.
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... Isolation of the wire under test from components and ground connections is useful. I have found that using a tracer on one single conductor wire using aircraft ground as a reference for the other test ...
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13 July 2014
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Test Equipment
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15.
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Easy 28
It might look cheap, but if a quick supply of 28 VDC is needed, it works great. This is mainly used as a "off aircraft" tester ...
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13 July 2014
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Test Equipment
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16.
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... can safely handle 1 amp for testing. 24 gauge wires, which are about the smallest installed on aircraft, are mainly used for signals. Putting 1 amp across a 24 gauge wire is not a good idea. On the rare ...
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13 July 2014
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Test Equipment
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17.
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... and reverse power of audio transmissions. The indication result is often referred to as SWR or Standing Wave Ratio.
Aircraft voice communication radios, VHF (118.00MHz – 136.00MHz) and HF (2.0MHz ...
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13 July 2014
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Test Equipment
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18.
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The rules for this site and forum are quite simple;
1. DO NOT use the material presented for actual aircraft repair. A full disclaimer can be found here. This is a troubleshooting resource, it is not ...
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13 July 2014
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Home Page
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19.
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... but direct observation of aircraft indications is preferred for comparison. I also like to verify that my test box inputs are not exceeding the component limits.
Digital equipment on ...
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11 July 2014
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Test Equipment
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20.
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Fuel Quantity Test
Aircraft fuel quantity indications are capacitance based systems. Troubleshooting and calibration of these systems is accomplished with ...
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11 July 2014
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Test Equipment
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21.
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...
Tips for Megger Testing
Wire shorts can occur anywhere throughout an aircraft. I have found that most are outside the pressure vessel, ...
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10 July 2014
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Test Equipment
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22.
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Decade Box
A Decade Box can be used for sensor simulation. The majority of temperature related sensors used on aircraft are resistance based. Resistance substitution ...
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10 July 2014
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Test Equipment
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23.
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Amp Clamp
The amp clamp is used for measuring current flow through a wire. The use of the unit for aircraft troubleshooting is limited to three ...
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10 July 2014
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Test Equipment
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24.
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... same. Most units use 108.10 MHz as a standard test frequency. This is actually the localizer frequency, but a matched glideslope output is also transmitted.
Tuning the aircraft's navigation ...
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10 July 2014
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Test Equipment
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25.
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VOR Test
The use of VOR systems as primary navigation is diminishing on most modern aircraft. GPS and FMS installations provide more reliable ...
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10 July 2014
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Test Equipment
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26.
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... meter readings correctly.
Troubleshooting aircraft systems requires access to plug and rack pins. Having a set of different size test leads is essential. Safety wire is not ...
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09 July 2014
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Test Equipment
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27.
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... meter readings correctly.
Diodes are solid state devices used extensively throughout aircraft avionics and electrical systems. They are basically a "check valve" for electrical ...
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09 July 2014
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Test Equipment
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28.
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... indications depending on wire condition. I tend not to get to excited about 25Ω or less. This would be a long run compared to most aircraft. The most common problem I have experienced while shooting a ...
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09 July 2014
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Test Equipment
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29.
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Voltage
The most common AC voltage systems on aircraft use 115, 26, & 5 VAC. Cycles are 400Hz. Normal power sources are 3 phase engine driven ...
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09 July 2014
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Test Equipment
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30.
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... hooked it up to the pylon plug..... aircraft side. The system tested normal.
So..... the problem is on the engine, but total resistance is reading good???
We then disconnected ...
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10 October 2026
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Blog: News
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31.
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... and the problem was "still" there. WTF????
I take a good look at the aircraft side tank disconnect plug and notice it has a really shitty tape wrap job. OK..... lets open it up.
Well..... ...
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08 October 2026
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Blog: News
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32.
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Aft cargo door not opening. Numerous shifts were messing with it. It took two days to figure out the problem.
The aft cargo door must lift vertically about 4 inches to clear the hooks before ...
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14 May 2026
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Blog: General Information
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33.
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Right GPS not able to receive satellite information. On this aircraft the right antenna is forward mounted.
Kalitta/DHL hangar going up in the background.
...
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17 February 2026
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Blog: News
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34.
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... issues with the aircraft???
Too tired to follow them all out. Either way, after the wiring was corrected, all systems (that we knew of) checked out.
Correct wiring verified by wire numbers..... ...
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01 October 2024
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Blog: News
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35.
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When the wing of a larger aircraft (A330) smacks the tail of a smaller one. They both lose..... one though, hurts worse.
Not sure if this is repairable.
https://www.foxnews.com/us/delta-endeavor-planes-collide-tarmac-hartsfield-jackson-atlanta-international-airport ...
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10 September 2024
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Blog: News
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36.
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Captain's pitot heat fail light on after engine start.
Please reference https://rotate.aero/forum/767-ice30/242-ata-30-31-pitot-heat for an understanding of the 767's pitot heat system.
The system ...
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10 September 2024
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Blog: News
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37.
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... Administration received more than eleven times as many Boeing whistleblower complaints compared to all of last year. The surge in whistleblowers first came after the 737 Max mid-flight door plug blowout ...
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28 June 2024
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Blog: News
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38.
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... door plug being blown off an Alaska Airlines flight over Portland earlier in the month was probably caused by the lack of bolts. This issue dates back to when the aircraft was manufactured.
According ...
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29 January 2024
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Blog: News
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39.
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... to be.
By now, I’m sure you’ve heard about the Jan. 6 near crash of a Boeing 737 Max 9 operated by Alaska Airlines, after the fuselage door blew off the plane. That caused decompression and the use of ...
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11 January 2024
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Blog: News
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40.
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... door plug – for example, bolts that needed additional tightening,” United said.
The mandated inspections come after the Federal Aviation Administration forced the grounding of Boeing 737 MAX 9 airplanes. ...
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10 January 2024
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Blog: News
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41.
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... and identify affected aircraft," Bloomberg said.
EASA said the parts with "falsified Authorized Release Certificate" were for CFM56 engines installed on older narrow-body planes. The regulator has told ...
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01 September 2023
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Blog: News
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42.
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... were red-flagged after investigators at the Department of Veterans Affairs cross-checked federal databases to discover aviators who were receiving veteran benefits for mental health disorders and other ...
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28 August 2023
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Blog: News
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43.
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... and Denver Airport, with 69.3 million, according to data released by Airports Council International (ACI).
After 22 years leading the charge as the number one airport for passenger volume, Atlanta's airport ...
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19 August 2023
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Blog: News
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44.
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... unclear.
It is part of a broader House bill to fund the Federal Aviation Administration after the agency’s current funding expires in October. The full US House is expected to vote on that broader bill ...
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20 July 2023
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Blog: News
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45.
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From Bloomberg
By Danny Lee
China Jet to Rival Airbus, Boeing Makes First Commercial Flight
A made-in-China aircraft to rival Boeing Co. and Airbus SE underwent its maiden commercial flight ...
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29 May 2023
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Blog: News
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46.
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...
His memo comes after a series of alarming incidents, including a United Airlines Boeing 777-200 that came within 800 feet of impacting the Pacific Ocean off Maui on Dec. 18, a computer 'glitch' that grounded ...
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15 February 2023
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Blog: News
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47.
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From Steve Kirsch Newsletter
Pilots are dying at Southwest Airlines at over 6X the normal rate after the COVID vaccines rolled out.
And disabilities are up 10X normal. I thought the vaccines were ...
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13 February 2023
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Blog: News
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48.
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... allow the use of a single pilot operation, first in cargo aircraft.
Not surprisingly, airline pilots are loudly protesting this idea, claiming that it would diminish a safety discipline and culture ...
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15 December 2022
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Blog: News
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49.
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... Concorde.
Giving life to the aircraft that changed the world was a challenge that brought the world’s largest aerospace company, Boeing, the then biggest engine builder Pratt, and Whitney and the ...
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24 August 2022
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Blog: News
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50.
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... Administration (FAA) to install a laser-based missile-defense system on its cargo aircraft.
In the filing dated January 7, 2022, the Department of Transportation of the Federal Aviation Administration ...
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18 January 2022
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Blog: News
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51.
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... not immediately respond for comment. Boeing and the FAA declined to comment.
Forkner, 49, was charged with two counts of fraud involving aircraft parts in interstate commerce and four counts of wire ...
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12 November 2021
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Blog: News
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52.
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... employees handle safety matters" after several company engineers told the agency they had faced "undue pressure" to skirt over them.
The FAA survey, conducted this year, revealed that 35% of a small sample ...
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24 August 2021
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Blog: News
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53.
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... lifted its guidance for full-year earnings, cash flow and aircraft deliveries, a day after Boeing posted its first profit in almost two years. The figures confirm a strengthening aerospace recovery that’s ...
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04 August 2021
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Blog: News
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54.
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... lead to pilots becoming incapacitated, according to Reuters.
FAA's directive requires Boeing to conduct tests on all 737 series aircraft. There are more than 9,300 worldwide and 2,500 in the US. Inspecting ...
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16 July 2021
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Blog: News
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55.
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... during a test flight on Dec. 8, 2020, when the plane experienced an "uncommanded pitch event" meaning the nose of the aircraft pitched abruptly up or down without input from the pilots. During the incident, ...
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27 June 2021
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Blog: News
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56.
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From BBC
By Theo Leggett Business correspondent, BBC News
Little more than six months after Boeing's 737 Max was cleared to fly again by US regulators, the aircraft finds itself under intense scrutiny ...
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19 May 2021
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Blog: News
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57.
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... While other domestic and international carriers gear up for a much wider re-launch of the aircraft, a former senior manager at Boeing's 737 Max plant in Seattle has published a new report warning that the ...
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28 January 2021
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Blog: News
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58.
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From Zero Hedge
Not long after the head of the FDA took a test flight on the newly revamped Boeing 737 MAX 8, Europe's top travel regulator has surpised the aviation world by becoming the first major ...
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16 October 2020
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Blog: News
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59.
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... to shore up its financials after two fatal 737 MAX crashes and the subsequent grounding of its 737 MAX planes in the interim. Melius Research estimates Boeing could see $23.3 billion in cash burn this ...
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01 October 2020
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Blog: News
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60.
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... push for the world's first zero-emission commercial aircraft is part of a much larger ambition for emission-reducing airliners as non-governmental organizations, such as the OECD, are urging industrie ...
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23 September 2020
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Blog: News
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61.
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From Zero Hedge
Boeing Put Profits Before People's Lives By Hiding 737 MAX Design Flaws From Regulators, Pilots
18 months after Ethiopian Airlines Flight 302 plummeted out of the sky just minutes ...
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16 September 2020
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Blog: News
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62.
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... aircraft to be stored in a desert lot in Victorville, California.
Boeing's troubles with parked jets are nothing new: last year Boeing had so many 737 Maxes after their global ground when it ...
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20 July 2020
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Blog: News
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63.
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... ahead of a final report which is expected within the next few weeks. In the immediate aftermath of the crash, observers were perplexed and alarmed at the sudden and steep descent the 767 appeared to have ...
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16 July 2020
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Blog: News
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64.
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From Airline Ratings
By Geoffrey Thomas
June 10, 2020
Airline Industry is expected to lose US$84 billion in 2020 according to the International Air Transport Association (IATA) which has just ...
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02 July 2020
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Blog: News
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65.
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... down the aircraft in two crashes in Indonesia and Ethiopia.
“I have no doubt the FAA and lawmakers are under considerable pressure to allow the 737 MAX to return to service as quickly as possible and ...
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19 June 2020
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Blog: News
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66.
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767 APU Hanging at 30% During Start
During the APU engine start, the IGV (Inlet Guide Vanes) are supposed to be closed. This allows all incoming air to be directed into the combustion chamber. After ...
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26 April 2020
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Blog: News
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67.
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... Moses Lake sites until further notice" after about 135 Boeing employees have tested positive for COVID-19.
"These actions are being taken in light of the company’s continuing focus on the health and ...
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07 April 2020
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Blog: News
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68.
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... unprecedented time for organizations and communities across the globe.”
Boeing’s announcement came just a day after a report from the Seattle Times (h/t KOMONews.com) said an employee at the company’s ...
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26 March 2020
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Blog: News
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69.
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... system that "violated Boeing’s own internal design guidelines."
Preliminary findings issued by Democrats on the House Transportation Committee Friday afternoon found Boeing executives and FAA regulators ...
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07 March 2020
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Blog: News
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70.
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From Zero Hedge
"Absolutely Unacceptable" - Leaked Boeing Memo Shows 'Debris' Found In 737 MAX Fuel-Tanks
By Tyler Durden
With airline after airline pushing back their 'return-to-service' dates based ...
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19 February 2020
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Blog: News
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71.
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... installed on the planes and basic issues related to aircraft safety," he said.
According to Barnett, one audit uncovered that 25% of oxygen masks didn't work. Defective parts were getting lost in the ...
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15 January 2020
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Blog: News
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72.
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... being a penny wise and a pound foolish. After all, in a report on the Oct. 29, 2018 accident, Indonesia’s National Transportation Safety Committee explicitly cited a failure by Boeing to tell pilots about ...
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14 January 2020
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Blog: News
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73.
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... of the Max, as well as in training for pilots who had not previously flown a 737.
“Would you put your family on a Max simulator trained aircraft? I wouldn’t,” one employee said to a colleague in another ...
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13 January 2020
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Blog: News
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74.
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From Reuters
Airbus beats goal with 863 jet deliveries in 2019, ousts Boeing from top spot
By Tim Hepher
Airbus has become the world’s largest planemaker for the first time since 2011 after delivering ...
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02 January 2020
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Blog: News
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75.
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From Zero Hedge
By Tyler Durden
Sources have told The Wall Street Journal that Boeing could temporarily halt production of the 737 Max amid concerns the timeline of ungrounding the aircraft could ...
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16 December 2019
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Blog: News
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76.
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... flying, even after a crash in Indonesia raised questions about the plane's safety that were apparently ignored, because a similar crash happened in Ethiopia less than six months later, bringing the combined ...
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12 December 2019
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Blog: News
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77.
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... assembly line suggested one in four of the aircraft’s personal oxygen systems could fail.
In an accusation that adds to the pressure on Boeing, he also claimed that parts known to be faulty were fitted ...
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10 December 2019
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Blog: News
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78.
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... the FAA’s once-unchallenged stature as the world’s most influential regulator. The agency had lost credibility in the days after the crash of an Ethiopian Airways 737 MAX in March. That followed the deadly ...
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27 November 2019
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Blog: News
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79.
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...
"I know there's a lot of pressure to return this aircraft to service quickly. But I want you to know that I want you to take the time you need and focus solely on safety. I've got your back," he ...
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19 November 2019
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Blog: News
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80.
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... jets as soon as next week.
The decision comes after Boeing's 737 MAX jet remains grounded worldwide following two fatal crashes.
The sources said the Emirati budget carrier would likely order 120 ...
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13 November 2019
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Blog: News
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81.
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... of exercised stock options was $19 million.
It was hundreds of millions in the years before that, when they had stock buybacks.
It was hundreds of millions in the years after that, when they ...
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06 November 2019
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Blog: News
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82.
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... same time announced that its turnover rose by 6% in Q3. 43,000 lawsuits and they’re doing fine, thank you.
In that same vein, Boeing shares rose 2.4% last night after the hearing (“a sign investors were ...
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31 October 2019
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Blog: News
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83.
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... A350-900. There are many ways of measuring the world's longest flights with factors such as strong head winds having a major impact on the length of time an aircraft stays airborne. As a result, claims ...
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22 October 2019
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Blog: News
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84.
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... weeks, and it's not related to the 737 MAX, but rather an earlier 737, called the 737 Next Generation, or 737NG.
After a comprehensive inspection of 737NGs across the world, Boeing has said 36 737NGs ...
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11 October 2019
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Blog: News
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85.
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... a new complaint filed against Boeing by a senior engineer, alleging the aircraft maker concentrated on prioritizing profits over the safety of the 737 Max airliner.
The Times learned about the new development ...
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02 October 2019
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Blog: News
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86.
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... cause significant turmoil in the global aviation sector.
The European Union Aviation Safety Agency (EASA) is insisting on conducting its own flight tests of the aircraft before allowing it to fly again ...
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25 September 2019
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Blog: News
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87.
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From Zero Hedge
By Tyler Durden
Expectations that the Boeing 737 MAX 8 will return to the skies any time in the near future have largely faded, and now, after dedicating billions of dollars to compensating ...
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27 August 2019
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Blog: News
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88.
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... will provide paid housing and a meal allowance for the temporary hires, is looking for avionics technicians, aircraft mechanics, airframe and engine mechanics, and aircraft electricians.
The marshaling ...
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22 August 2019
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Blog: News
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89.
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... recent weeks, a potential failure got their attention.
The plane’s flight computer tried to push the aircraft’s nose down repeatedly during a simulator run, prompted by a stream of erroneous flight data. ...
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10 August 2019
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Blog: News
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90.
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... According to CEO Dennis Muilenberg, Boeing expects to submit its "final certification package" to the FAA in September.
Shares of the airline tumbled 5% on Thursday in premarket trading after the low-budget ...
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25 July 2019
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Blog: News
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91.
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From Zero Hedge
By Tyler Durden
Two weeks ago, we noted how, after ignoring them for months (presumably at the behest of its legal department), Boeing had decided to dedicate $100 million (roughly ...
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17 July 2019
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Blog: News
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92.
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... with a $5.9 billion order for 30 Boeing 737 MAX aircraft, instead opting for a fleet of Airbus A320 jets, with options for a further 20 of the jets.
According to Reuters, Flyadeal has been reconsidering ...
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08 July 2019
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Blog: News
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93.
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... New York Times article on the Boeing 737 fiasco provides a perfect illustration of the concept. We’re now learning that the company “built deadly assumptions” into its newly designed 737 Max aircraft and, ...
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22 June 2019
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Blog: News
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94.
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... largest aircraft makers lock in deals worth tens of billions of dollars. Well, the first day of the 2019 edition of this boondoggle couldn't have gone any worse for Boeing, and alternatively it couldn ...
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19 June 2019
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Blog: News
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95.
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From Aviation Tribune
By Aviation Tribune
The Antonov AN-225 is known to be the largest cargo aircraft in the world. Developed in the 1980’s, so far just one model has been introduced onto the market. ...
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11 June 2019
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Blog: News
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96.
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... the 737 MAX fleet after two fatal accidents.
Elwell was asked whether airlines that had taken the MAX out of their schedules would need to revise their plans to take into account a longer wait.
“No ...
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31 May 2019
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Blog: News
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97.
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... lapses at Boeing or the FAA during the certification process of the 737 MAX 8.
We've already learned that Boeing didn't realize until after the Lion Air crash back in October that a warning system meant ...
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15 May 2019
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Blog: News
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98.
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... investigation’s preliminary findings said the pilots hit the system-cutoff switches as Boeing had instructed after October’s Lion Air MAX crash, but couldn’t get the plane’s nose back up. They then turned ...
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11 May 2019
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Blog: News
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99.
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... suppliers that are producing at the old rate, while others have transitioned to 42 per month, a 20% decline from the old rate.
Safran, a French multinational aircraft engine company with a joint venture ...
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07 May 2019
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Blog: News
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100.
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... admitted that it wasn't aware that the alerts had been disabled when it initially delivered the planes, and that it waited more than 13 months, until after the Oct. 29 crash of a 737 MAX 8 owned by Indonesia' ...
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06 May 2019
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Blog: News