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SDR ASAA2021091235953

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Service difficulty report · Control Module · Boeing 737890

FAA SDR system

Difficulty date
September 12, 2021
Submitted
September 22, 2021
Operation
Air carrier
Aircraft
N560AS
Make and model
Boeing 737890
Aircraft serial
35179
Aircraft time
55,340 hours, 16,560 cycles
System (JASC)
2612 · Fire Detection
Part
Control Module
Condition
No Test
Location
Apu Fire Detect
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

#1 A LOOP INOP. DOES NOT TEST. GROUNDED - YES. REPLACED CONNECTOR D30252 PER B737 SWPM 20-63-00 .REMOVED AND REPLACED CONNECTOR D39927 PER SWPM 20-60-06, ENGINE APU FIRE CONTROL MODULE FAULTS UPPER FAN A LOOP. REMOVED AND REPLACED UPPER FAN LOOP REF B737-800 AMM 26-11-01, OPS CHECKS NORMAL. FUEL SPAR VALVE TEST PASSED REFA MM 28-22-00, EEC BITE REF AMM 71-00-00, TEST PASSED. ENG COWL ANTI ICE TEST PASSED REF AMM 30-21-00, IGNITION SYSTEM AUDIBLE TEST REF AMM 74-00-00, TEST PASSED. AVM OPS TEST PASSED REF AMM 77-31-00. CONNECTOR D39927 LEAK CHECK GOOD.