Service difficulty report · Fire Detector · Boeing 1072

Difficulty date
March 15, 2018
Submitted
March 21, 2018
Operation
Air carrier
Aircraft
N194CH
Make and model
Boeing 1072
Aircraft serial
404
Aircraft time
44,064 hours
Part
Fire Detector
Part number
47327502
Part serial
0918
Condition
Defective
Location
Nr 2 Engine
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

SHORTLY AFTER DEPARTURE, THE NR 2 ENGINE FIRE LIGHT ILLUMINATED FOR A BRIEF MOMENT. PILOTS CONFIRMED THAT THERE WAS NO FIRE AND DETERMINED THAT IT WAS A FALSE FIRE INDICATION. AFTER APPROXIMATELY 1 MINUTE OF THE FIRE INDICATION LIGHT ILLUMINATION, THE PILOT PULLED AND RESET THE CIRCUIT BREAKER AND THEN THE FALSE FIRE INDICATION ILLUMINATED AGAIN AND CONTINUED FOR APPROXIMATELY AN ADDITIONAL 15 SECONDS. FIRE DETECTOR BREAKOUT PANEL C07T2953-9 WAS INSTALLED AT THE TIME IAW SL 107-0171 AND IT INDICATED THAT THE NR 2 AFT UPPER INBOARD FIRE DETECTOR TRIGGERED THE FIRE INDICATION SYSTEM. LANDED AND THE AIRCRAFT WAS SHUT DOWN. PERFORMED A VISUAL INSPECTION OF THE ASSOCIATED AIRCRAFT WIRING AND COULD NOT FIND ANY DEFECTS. REMOVED AND REPLACED THE NR 2 ENGINE AFT UPPER INBOARD FIRE DETECTOR.