# SDR ASAA2023022242084

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 2023
- Submitted: February 27, 2023
- Operation: Air carrier
- Aircraft: [N413AS](https://openairdocs.org/aircraft/N413AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 35205
- Aircraft time: 36,887 hours, 11,616 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: 28B5459STYLEA
- Part serial: 106F2422
- Condition: Faulted
- Location: Apu
- Part time: 7,103 hours, 11,909 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023022242084

## Discrepancy

APU MAINT LIGHT ILLUMINATED AFTER APU START. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR REF B737-900 AMM 49-41-21.

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