SDR ASAA2012070592501

Service difficulty report · Exciter · Boeing 737890

Difficulty date: July 5, 2012
Submitted: July 10, 2012
Operation: Air carrier
Aircraft: N519AS
Make and model: Boeing 737890
Aircraft serial: 36482
Aircraft time: 12,993 hours, 3,943 cycles
System (JASC): 4940 · APU Start/Ignition System
Part: Exciter
Part number: 38880587
Part serial: 086971102770
Condition: Failed
Location: Apu
Part time: 7,200 hours, 5,884 cycles
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

APU FAULT LIGHT ILLUMINATED ON START ATTEMPT. WAITED 5 MIN, FAULT LIGHT EXTINGISHED ATTEMPTED SECOND START, FAULT LIGHT ILLUMINATED AGAIN. R & R APU IGNITION UNIT, IGNITER PLUG, AND IGNITION LEAD IAW AMM 49-41-31, 49-41-51 AND 49-41-52. PERFORMED APU STARTING AND OPERATION IAW AMM 49-11-00-860-801, APU STARTED OK AND OPS CHECKED GOOD.