This is another "bad from stock" adventure so far... The installed MEC was causing intermittent EEC EICAS messages...  Our Reliability folks wanted it changed due to the MEC having a history of this same fault in its previous life. The first replacement MEC was installed. During high-power runs, the MEC would not make takeoff power and the flight idle was erratic, but the ground idle was stable. The second replacement MEC was installed... This round of high-power runs, the MEC would make takeoff power fine, but again the flight idle is hunting. We adjusted the flight idle screw, no change at all. We rang out all aircraft wiring from breakers to the right engine flight/ground idle pins twice on two shifts, no issues. We decided to take the aircraft out of the equation by depinning the wires for the flight idle solenoid at the MEC connector, then running jumper wires from the MEC to a 28 volt DC power supply outside the engine, then ran the engine. The flight idle still hunts erratically, with ground idle normal with no fluctuations. And now, a second MEC change required. Further updates as the plot thickens...

Photo of the setup:
 


 

 Fire Loop Heat Shrink
  
     
  

From two general Google searches:

www.transglobaltraining.com/boeing-787-common-core-system/  

For the post above on the riveted terminal block......

The red pins are "not" used for the block part number listed above.

They are a smaller diameter. 

The blue pins are correct.
  
     
 

I have never worked on the 787 and I'm close to the end of my career, so I doubt I ever will.

I have asked a new member Hassan70 if he can give you the basics.

I would think getting heavy details might be a tad bit much to ask for.

Would you please furnish a detailed and exhaustive explanation of the role and functionality of the Central Computing Resource (CCR) within the 787 aircraft?

I found a riveted on ground block which I've never dealt with before.
  
     
  
Some info on part numbers and pins.....