SDR ASAA2018011223165

Service difficulty report · Sensor · Boeing 737990ER

Difficulty date: January 12, 2018
Submitted: January 17, 2018
Operation: Air carrier
Aircraft: N467AS
Make and model: Boeing 737990ER
Aircraft serial: 36362
Aircraft time: 14,188 hours, 4,748 cycles
System (JASC): 4960 · APU Controls
Part: Sensor
Part number: MS280341
Condition: Faulted
Location: Apu Temp
Stage of operation: TX
How discovered: V
Nature of condition: J
Precautionary procedure: D

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

APU FAULT LIGHT AFTER SHUTDOWN. ACFT GROUNDED. FOUND FAULT CODE 49-61223. ACCOMPLISHED VISUAL INSPECTION OF THE TAILCONE AREA. NO EVIDENCE OF DAMAGE. ACCOMPLISHED FIM 49-60-812. INITIAL EVALUATION SHOWED NO CURRENT FAULTS. UNABLE TO INDUCE FAULTS DURING HARNESS INSPECTION. REMOVED & REPLACED APU INLET TEMP SENSOR IAW AMM 49-61-31-000-801, INSTALLATION TEST PASSED. FIM 49-60-812 REPAIR CONFIRMATION PASSED.