SDR ASAA2018101726479

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: October 14, 2018
Submitted: October 17, 2018
Operation: Air carrier
Aircraft: N494AS
Make and model: Boeing 737990ER
Aircraft serial: 41729
Aircraft time: 10,849 hours, 3,577 cycles
System (JASC): 2612 · Fire Detection
Part: Unknown
Condition: Malfunctioned
Location: Fire Warning
Stage of operation: TX
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

CARGO FIRE FWD DOES NOT TEST PROPERLY. GROUNDED - YES. CARGO FIRE CONTROL PANEL TEST PASSES AT ALL DET SELECT SWITCH POSITIONS. PERFORMED B737-900 FIM 26-16 TASK 801 CARGO ELECTRONICS UNIT BITE PROCEDURE, NO FAULTS FOUND. CLEANED FWD CARGO COMPARTMENT A-LOOP SMOKE DETECTORS REF B737-900 AMM 26-16-01-100-801 AS A PRECAUTION. RETESTED CEU AND CONTROL PANEL TESTS REF FIM 26-16 TASK 801, NO FAULTS FOUND.