# SDR ASAA2022120941085

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2022
- Submitted: December 12, 2022
- Operation: Air carrier
- Aircraft: [N428AS](https://openairdocs.org/aircraft/N428AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36353
- Aircraft time: 24,662 hours, 7,726 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Generator
- Part number: 28B5459STYLEA
- Part serial: 87F2809
- Condition: Inoperative
- Location: Apu
- Part time: 6,067 hours, 10,307 cycles
- Stage of operation: TX
- 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/ASAA2022120941085

## Discrepancy

APU GENERATOR FELL OFF LINE PRIOR TO PUSHBACK. GROUNDED - YES. REMOVED AND REPLACED APU GENERATOR WITH REFERENCE B737-900 AMM 49-41-21-400-801 STEP (H) (7C). OPS CHECK GOOD AND NO LEAK FOUND WITH REF AMM 49-41-21-710-001.

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