Topic-icon Bleed Isolation Valve Indication

5 years 10 months ago - 5 years 10 months ago #94 by Mark D Francis
We had a problem with the overhead Bleed Iso Valve annunciator showing "in-line" and EICAS "Iso Valve Open" blue message with the valve closed. This was an intermittent indication.

Relay K61A in lower left relay panel, second rack back.

Iso valve in hell-hole. Dead center top above ladder landing platform.

#1 DAU. Left radio rack.

The problem turned out to be a bad relay. A short vid showing what it was doing can be found here .

GIV ATA 36, Pneumatics
Isolation Valve Indication
AMM 32-00-00 and 36-12-00
WDM 36-12-00
Last edit: 5 years 10 months ago by Mark D Francis.

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