SDR ASAA2016052416843

Service difficulty report · Apu · Boeing 737890

Difficulty date: May 24, 2016
Submitted: May 26, 2016
Operation: Air carrier
Aircraft: N597AS
Make and model: Boeing 737890
Aircraft serial: 35689
Aircraft time: 31,180 hours, 9,604 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Apu
Condition: Malfunctioned
Stage of operation: CR
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

APU FAILED TO START FL360, FL300 WITH FAULT LIGHT. ACFT GROUNDED. INTERROGATED APU FAULTS, CURRENT FAULTS: NONE. FAULT HISTORY SHOWS LAST 2 LEGS FAULT MESSAGE 49-31016, OVER TEMPERATURE SHUTDOWN. PERFORMED FIM 49-30, TASK 803, STEP A1A. PERFORMED APU GROUND OPS TEST IAW AMM 49-11-00-710-801, OPERATES NORMALLY ON GROUND.