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SDR ASAA2021101336286

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Service difficulty report · Fire Loop · Boeing 737890

FAA SDR system

Difficulty date
October 13, 2021
Submitted
October 15, 2021
Operation
Air carrier
Aircraft
N560AS
Make and model
Boeing 737890
Aircraft serial
35179
Aircraft time
55,605 hours, 16,668 cycles
System (JASC)
2612 · Fire Detection
Part
Fire Loop
Part number
902864
Condition
Inoperative
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

ENGINE #1 A LOOP FIRE INOP. GROUNDED - YES. PERFORMED B737-800 FIM 26-10 TASK 805 FOUND NO ACTIVE FAULTS AND OVERHEAT TEST OPS NORMAL. ALL ENG 1 LOOPS MEASURE WITHIN LIMITS. FOUND BROKEN STUD ON UPPER FAN LOOP A DECTECTOR. REPLACED UPPER FAN LOOP REF B737-800 AMM 26-11-02/401. RECHECKED ALL FAN LOOPS AND PERFORMED HARNESS SHAKE DOWN WITH NO FAULTS NOTED. PERFORMED BITE TEST AND FOUND NO FAULTS. OVERHEAT TEST OPS NORMAL ON LOOP A ENG 1.