SDR UIEA2015071300342

Service difficulty report · Fire Warning · Boeing 74745E

Difficulty date: July 10, 2015
Submitted: July 13, 2015
Operation: Air carrier
Aircraft: N473MC
Make and model: Boeing 74745E
Aircraft serial: 27174
Aircraft time: 91,717 hours, 16,167 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Warning
Condition: False Activation
Location: Cockpit
Stage of operation: TX
How discovered: O
Nature of condition: N
Precautionary procedure: D

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

What was found

AFTER B/O FIRE, MAIN DECK AFT EICAS MSG CONFIRMED. NO FIRE RETURNED TO BLOCKS. PERFORMED CMC FIRE WARNING TEST, SYS CHECKED NORMAL IAW AMM 26-14-00-735-067. NO OTHER MSG NOTED. NOTICED HIGH HUMIDITY, FOG, ON AFT MAIN DECK CAUSING THE AFT FIRE DETECTORS TO ACTIVATE. ACFT OK FOR SERVICE.

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