SDR ASAA2013031494177

Service difficulty report · Warning Light · Boeing 737890

Difficulty date: March 14, 2013
Submitted: March 18, 2013
Operation: Air carrier
Aircraft: N512AS
Make and model: Boeing 737890
Aircraft serial: 39043
Aircraft time: 17,583 hours, 5,506 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Warning Light
Condition: False Activation
Location: Apu
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

DURING APU START AT GATE, FAULT LIGHT ILLUMINATED. TURNED APU SWITCH OFF AND LIGHT WENT OUT. SECOND START WAS NORMAL. COMPLISHED APU BITE IAW FIM 49-60, TASK 801. CURRENT STATUS SHOWS NO FAULTS. FAULT HISTORY FOR PREVIOUS START SHOWS MX MESSAGE 49-41012, NO APU ROTATION SHUTDOWN. ACCOMPLISHED FIM 49-40, TASK 803 FAULT CLASSIFIED AS INTERMITTENT. APU GROUND START SUCCESSFUL.