SDR ASAA2012102393168

Service difficulty report · Apu · Boeing 737890

Difficulty date: October 23, 2012
Submitted: October 25, 2012
Operation: Air carrier
Aircraft: N586AS
Make and model: Boeing 737890
Aircraft serial: 35189
Aircraft time: 19,372 hours, 6,154 cycles
Engine: Cfmint CFM567B27
System (JASC): 4940 · APU Start/Ignition 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 FIRST START AT FL 320, WITH FAULT LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURE. FAULT LIGHT EXTINGUISHED AND SECOND APU START SUCCESSFUL. NOTE APU EGT HUNG AT APPROX 450 DEGREES WITH FAULT LIGHT ON FIRST ATTEMPT. TROUBLESHOT CDU - FOUND FAULT 49-41010 - ACCOMPLISHED FIM TASK 49-40 TASK 801 - NO CURRENT FAULTS OR MAINT. ACCOMPLISHED APU STARTING & OPERATION IAW AMM TASK 49-11-00-860-801, NO FAULTS NOTED ON CURRENT STARTS. SUCCESSFUL GROUND VERIFICATION ACCOMPLISHED.