SDR ASAA0956646

Service difficulty report · Fire Warning · Boeing 737890

Difficulty date: September 18, 2009
Submitted: September 21, 2009
Operation: Air carrier
Aircraft: N584AS
Make and model: Boeing 737890
Aircraft serial: 35682
Aircraft time: 8,066 hours, 2,366 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Warning
Condition: Malfunctioned
Location: Apu
Stage of operation: NR
How discovered: O
Nature of condition: N
Precautionary procedure: K

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

What was found

MASTER CAUTION OVERHEAT/DET APU DET INOP APU FAULT LIGHTS FLASHED ON THEN OFF 5 DIFFERENT TIMES ON FOR 1 - 2 SECONDS. PERFORMED ENG/APU FIRE DET CONT MODULE BITE PROCEDURE FIM 26 10 00 810 801 BITE TEST PASSED OK. PERFORMED APU FIRE DET, OP TEST OK PER AMM 26 15 00 710 801. PERFORMED APU FIRE DET LOOP RESISTANCE SYSTEM TEST PER AMM 26 15 00 730 801 RESISTANCE WITHIN LIMITS AT 1038 OHMS. INSPECTED FIRE LOOPS AT APU ALL CHECKED OK. VERIFICATION FLIGHT SATISFACTORY.