SDR IPXA10B63555

Service difficulty report · Circuit Card · Boeing 74744AF

Difficulty date: November 6, 2010
Submitted: November 8, 2010
Operation: Air carrier
Aircraft: N576UP
Make and model: Boeing 74744AF
Aircraft serial: 35665
Engine: Ge CF680C2B1F
System (JASC): 2612 · Fire Detection
Part: Circuit Card
Part number: 3500833
Part serial: 2217
Condition: Malfunctioned
Location: Fire Warning
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIR TURN BACK DUE TO WHEEL WELL FIRE WARNING MESSAGE AT LEVEL OFF FL340, WHEEL WELL FIRE WARNING REPEATED ITSELF. PERFORMED VISUAL INSP AT BOTH WHEEL OVERHEAT DETECTOR, FOUND NO DEFECTS AND NO MESSAGE NOTED. PERFORMED POWER ENGINE RUN, AND CHECKED DUCT LEAK AT WHEEL WELL, OK REPLACED DUCT LEAK WHEEL WELL CONTROL CARD M826 PRECAUTIONARY.

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