# SDR ASAA2017091121911

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2017
- Submitted: September 14, 2017
- Operation: Air carrier
- Aircraft: [N577AS](https://openairdocs.org/aircraft/N577AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35186
- Aircraft time: 39,845 hours, 11,837 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880585
- Part serial: 030218038547
- Condition: Failed
- Location: Apu
- Part time: 9,582 hours, 15,846 cycles
- Stage of operation: TX
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017091121911

## Discrepancy

APU WONT START.  ACFT GROUNDED.  REMOVED AND REPLACED APU EXCITER, LEAD, AND IGNITER.  OPS CHECKED GOOD IAW AMM 49-41-31, 49-41-51, AND 49-41-52.

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