SDR ASAA2015041311344

Service difficulty report · Apu · Boeing 737990ER

Difficulty date: April 13, 2015
Submitted: April 15, 2015
Operation: Air carrier
Aircraft: N461AS
Make and model: Boeing 737990ER
Aircraft serial: 36363
Aircraft time: 4,070 hours, 1,354 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Apu
Condition: Malfunctioned
Stage of operation: TX
How discovered: 9
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

DURING APU START SEQUENCE, APU FAILED TO STABILIZE AND FAULT LIGHT ILLUMINATED. ACFT GROUNDED. PERFORMED APU BITE CHECK REF 49-61-00, MAINTENANCE MSG 49-41011 FOUND, PERFORMED FIM TASK 49-40, TASK 802 IAW STEP F, A, FAULT DEEMED TO BE INTERMITTENT FAULT, NO FURTHER ACTION REQUIRED AT THIS TIME.