# SDR ASAA2019092330800

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 23, 2019
- Submitted: September 25, 2019
- Operation: Air carrier
- Aircraft: [N535AS](https://openairdocs.org/aircraft/N535AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35200
- Aircraft time: 33,929 hours, 9,824 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880585
- Part serial: 030218037319
- Condition: Inoperative
- Location: Apu
- Part time: 3,415 hours, 6,178 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/ASAA2019092330800

## Discrepancy

FAULT ON APU START. 2 ATTEMPTS. GROUNDED - YES. REMOVED AND REPLACED APU EXCITER PER AMM 49-41-31-400-801 AND 49-41-31-00-801. OPS CHECK GOOD.

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