SDR ASAA2021042534688

Service difficulty report · Fire Loop · Boeing 737890

Difficulty date: April 25, 2021
Submitted: May 4, 2021
Operation: Air carrier
Aircraft: N560AS
Make and model: Boeing 737890
Aircraft serial: 35179
Aircraft time: 54,064 hours, 16,154 cycles
Engine: Ge
System (JASC): 2610 · Detection System
Part: Fire Loop
Condition: False Activation
Location: # 1 Engine
Stage of operation: IN
How discovered: O
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

#1 ENG OVHT DET "A" LOOP WILL NOT TEST. GROUNDED - YES. #1 ENGINE BITE OF CONTROL MODULE DONE WITH NO FAULTS FOUND REF B737-800 FIM 26-10 TASK 801. ENG FIRE DETECTION OPERATIONAL TEST GOOD FOR A AND B LOOPS. #1 ENGINE OPENED WITH ALT DE-ACTIVATION AND ALL FIRE DETECTION LOOPS AND HARNESSES INSPECTED: NO DEFECTS NOTED. RAN #1 ENG AND ENG FIRE DETECTION OPERATIONAL TEST DONE WITH NO FAULTS. NO FAULTS ON CONTROL MODULE EITHER. GROUND VERIFICATION GOOD.