# SDR ASAA2016113018896

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2016
- Submitted: December 2, 2016
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 40,124 hours, 11,837 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: 28B5457STYLEC
- Part serial: 23A1276
- Condition: Failed
- Location: Apu
- Part time: 8,031 hours, 12,484 cycles
- Stage of operation: TX
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016113018896

## Discrepancy

DURING TAXI IN, APU START ATTEMPTED, FAULT LIGHT ILLUMINATED. APU DID NOT START. QRM COMPLETED. APU FAILED TO START ON SUBSEQUENT RESTART ATTEMPTS. GROUNDED - YES. REMOVED AND REPLACED APU STARTER-GENERATOR IAW B737-800 AMM 49-41-21. OPS CK AND LEAK CK GOOD. NO DEFECTS NOTED.

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