SDR ASAA2015051211711

Service difficulty report · Apu · Boeing 737890

Difficulty date: May 12, 2015
Submitted: May 15, 2015
Operation: Air carrier
Aircraft: N533AS
Make and model: Boeing 737890
Aircraft serial: 35201
Aircraft time: 17,035 hours, 5,076 cycles
System (JASC): 4960 · APU Controls
Part: Apu
Condition: Malfunctioned
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

PILOT REPORT APU DON'T START AND HAVE FAULT LIGHT. ACFT GROUNDED. TECH SERVICES REQUESTS FOLLOW UP. PERFORMED FIM 49-90, TASK 802 AS REQUESTED FROM BEGINNING THRU STEP F.4. APU BITE SHOWED NO CURRENT FAULTS BUT FOUND MSG 49-61224 INLET TEMP SENSOR SHOWS OUT OF RNG HIGH AFTER SHUTDOWN. R & R INLET TEMP SENSOR IAW STEP F. 4. APU START & OPS NORMAL IAW AMM 49-11-00 AND APU BITE OPS NORMAL IAW FIM 49-60 TASK 801, NO FAULTS AFTER SHUTDOWN. GROUND VERIFICATION SUCCESSFUL.