SDR ASAA2019111291287

Service difficulty report · Fire Loop · Boeing 737990ER

Difficulty date: November 9, 2019
Submitted: November 13, 2019
Operation: Air carrier
Aircraft: N483AS
Make and model: Boeing 737990ER
Aircraft serial: 36350
Aircraft time: 17,002 hours, 5,485 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Loop
Condition: No Test
Location: Cargo Bay
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 CARGO WARNING FIRE TEST AFT ARM LIGHT DOES NOT ILLUMINATE AND AMBER DETECTOR FAULT LIGHT ILLUMINATED. SELECTING LOOP A RESULTS IN A SUCCESSFUL TEST, B LOOP APPEARS TO BE INOP. GROUNDED - YES. ACCOMPLISHED A CARGO BAY SMOKE DETECTION OPERATIONAL TEST PER B737-900 AMM 26-16-00-710-801. CHECKS GOOD. ACCOMPLISHED FIM 26-16/801 - CEU BITE. NO NOTED FAULTS. GVI'D THE AFT PIT DETECTORS. NO NOTED DISCREPANCIES.