# SDR ASAA2016021815590

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2016
- Submitted: February 22, 2016
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 34,425 hours, 10,280 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: Exciter
- Part number: 38880587
- Part serial: 076971101072
- Condition: Failed
- Location: Apu
- Part time: 6,375 hours, 11,873 cycles
- Stage of operation: TX
- 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/ASAA2016021815590

## Discrepancy

APU FAULT LIGHT AFTER LANDING UPON START UP.  ACFT GROUNDED.  PERFORMED FIM 49-40, TASK 802, REPLACED APU IGNITION UNIT IAW AMM 49-41-31.  APU STARTS AND OPERATES NORMALLY, NO FAULT INDICATED.

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