SDR DALA2020121404076

Service difficulty report · Fire Loop · Boeing 757232

Difficulty date: December 13, 2020
Submitted: December 14, 2020
Operation: Air carrier
Aircraft: N663DN
Make and model: Boeing 757232
Aircraft serial: 24992
Aircraft time: 83,400 hours, 38,463 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Loop
Condition: Damaged
Location: Apu Bay
Stage of operation: IN
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

AT 41000 RECEIVED APU FIRE LIGHT AND BELL. FOLLOWED PROCEDURES IN QHR, DISCHARGING BOTH FIRE BOTTLES, BUT FIRE INDICATION REMAINED. LANDED UNEVENTFULLY. AFTER LANDING EICAS FIRE INDICATION CAME AND WENT MULTIPLE TIMES. FIRE HANDLE ILLUMINATED CONTINUOUSLY. CORRECTIVE ACTION: MAINTENANCE FOUND UPPER APU FIRE LOOP BAD AND NR 2 SQUIB TEST PANEL BUTTON INOPERATIVE. SQUIB TEST PANEL AND APU UPPER FIRE LOOP AND BOTH APU FIRE EXTINGUISHER BOTTLES. SYSTEM OPERATION IS NORMAL.