SDR ASAA2012120593411

Service difficulty report · Sensor · Boeing 737890

Difficulty date: December 5, 2012
Submitted: December 7, 2012
Operation: Air carrier
Aircraft: N585AS
Make and model: Boeing 737890
Aircraft serial: 35683
Aircraft time: 20,243 hours, 6,199 cycles
System (JASC): 4970 · APU Indicating System
Part: Sensor
Part number: MS280341
Condition: Failed
Location: Inlet Temp
Stage of operation: TX
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

APU FAULT LIGHT ILLUMINATED AFTER APU SHUTDOWN. FAULT LIGHT EXTINGUISHED AFTER APPROX 3 MINUTES. PERFORMED APU BITE TEST IAW FIM 49-60-801, FAULT CODE 49-61224 DISPLAYED, INLET TEMP SENSOR SHOWS OUT OF RANGE HIGH. R & R INLET TEMP SENSOR IAW MM 49-61-31. RAN APU, OPS CHECK NORMAL, PERFORMED APU BITE, NO CURRENT FAULT.