Service difficulty report · Fire Detector · Boeing 737824

Difficulty date
August 12, 2024
Submitted
August 15, 2024
Operation
Air carrier
Aircraft
N37290
Make and model
Boeing 737824
Aircraft serial
31601
Aircraft time
63,055 hours, 23,164 cycles
Part
Fire Detector
Part number
6937307300
Part serial
D03795
Condition
False Activation
Location
Zone 400
Part time
54,986 hours, 20,754 cycles
Stage of operation
NR
How discovered
O
Nature of condition
N
Precautionary procedure
A

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

What was found

ENG 1 OVHT LOOP A CREW REPORTS WARNING ON CLIMB OUT. WHEN THROTTLES PLACED TO IDLE ENG1 OVERHEAT LIGHT ILLUMINATED WITH ENGINES OFF. ACP ENG APU REF FIM 26-10 TASK 811 REPLACED P8-1 PEDESTAL FIRE DET ENG APU MODULE REF AMM CONDUCTED AMM SUBTASK 26-00-01-720-001 STEP (2). PASSED. WARNING WENT OUT. ADVANCED THROTTLE FOR LANDING WITH NO CONTROL MODULE BITE PER FIM 26-10 801. NO FAULTS 26-00-01-400-801. ALL INSTALLATION TESTS NEED TO BE ACCOMPLISHED WARNINGS. ALL ENGINE INDICATIONS NORMAL AND MATCHED NR 2 ENG. REF AMM 26-00-01-400-801 PARA 3.G REQUESTING INSPECTION FOR INSTALLATION OF PERFORMED TEST (9) WHEEL WELL, WING AND LOWER AFT BODY OVERHEAT SQUIB CONNECTORS. DETECTION SYSTEM - OPERATIONAL TEST, TASK 26-18-00-710-801, OPS TEST OK. AIRPLANE HAS BEEN RETURNED BACK TO USUAL CONDITION REF AMM 26-00-01-400-801. IN COMPLIANCE WITH AMM: 26-21-00-730-801 AND IDT CONDUCTED AMM SUBTASK 26-00-01-720-002 STEP (3). PASSED PERFORMED TEST (4): ENGINE FIRE EXTINGUISHING BOTTLE SQUIB PERFOREMED TEST (6) APU FIRE SWITCH SYSTEM SHUTDOWN TEST. OPS REF AMM 26-00-01-400-801. PERFORMED TEST (7) APU FIRE PER TOMC FULL POWER ENGINE RUN MUST BE PERFORMED TO CONFIRM THAT ADD EMP:U224567 CIRCUIT TEST, AND TEST (5): ENGINE FIRE EXTINGUISHING BOTTLE CHECK GOOD. REF AMM: 26-22-00-720-801 EXTINGUISHING BOTTLE SQUIB CIRCUIT TEST