# SDR ASAA2019081963413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2019
- Submitted: August 19, 2019
- Operation: Air carrier
- Aircraft: [N529AS](https://openairdocs.org/aircraft/N529AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35198
- Aircraft time: 36,323 hours, 10,847 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- 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
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019081963413

## Discrepancy

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.

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