SDR ASAA2019081963413

Service difficulty report · Exciter · Boeing 737890

Difficulty date: August 16, 2019
Submitted: August 19, 2019
Operation: Air carrier
Aircraft: N529AS
Make and model: Boeing 737890
Aircraft serial: 35198
Aircraft time: 36,323 hours, 10,847 cycles
System (JASC): 4940 · APU Start/Ignition System
Part: Exciter
Part number: 38880587
Part serial: 130370
Condition: Failed
Location: Apu
Part time: 5,385 hours, 10,212 cycles
Stage of operation: NR
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

FAULT LIGHT ILLUMINATED AFTER ATTEMPTING TO START THE APU. GROUNDED - YES. REMOVED & INSTALLED NEW IGNITER PLUG LEAD, OPS CHECK GOOD, PER B737-800 AMM 49-41-52. REMOVED & INSTALLED NEW IGNITER PLUG, OPS CHECK GOOD, PER AMM 49-41-51.REMOVED & INSTALLED NEW IGNITION UNIT, OPS CHECK GOOD, PER AMM 49-41-31.