SDR ASAA2021120736867

Service difficulty report · Fire Loop · Boeing 737890

Difficulty date: December 7, 2021
Submitted: December 13, 2021
Operation: Air carrier
Aircraft: N529AS
Make and model: Boeing 737890
Aircraft serial: 35198
Aircraft time: 41,449 hours, 12,231 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Loop
Condition: No Test
Location: Nr 1 Engine
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

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

What was found

DURING OVERHEAT DETECTION/FIRE TEST, #1 ENGINE WOULD NOT ILLUMINATE ON LOOP B. LOOP A OPERATES NORMALLY. GROUNDED - YES. PERFORMED OPERATIONAL TEST OF OVERHEAD FIRE DETECTION. PERFORMED ENGINE FIRE DETECTION BITE PROCEDURE B737-800 FIM 26-10 TASK 801, NO FAULTS SHOWS. ACCOMPLISHED VISUAL INSPECTION REF B737-800 AMM 26-11-01 PER TECH SERVICES. ALL OPS TEST GOOD, NO DEFECTS NOTED. GROUND VERIFICATION SUCCESSFUL.