# SDR ASAA2015031710996

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 2015
- Submitted: March 19, 2015
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 25,248 hours, 7,732 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880587
- Part serial: 086971100163
- Condition: Failed
- Location: Apu
- Part time: 5,958 hours, 10,497 cycles
- Stage of operation: NR
- 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/ASAA2015031710996

## Discrepancy

APU FAILED TO START.  ACFT GROUNDED.  R & R THE APU IGNITION UNIT REF AMM 49-41-31. OPS CHECK NORMAL.

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