# SDR AALA202509259776

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 22, 2025
- Submitted: September 26, 2025
- Operation: Air carrier
- Aircraft: [N793AN](https://openairdocs.org/aircraft/N793AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30255
- Aircraft time: 94,911 hours, 12,374 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: 756589A
- Part serial: 0324
- Condition: Shutdown
- Location: Zone 100
- Part time: 63,733 hours, 10,062 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202509259776

## Discrepancy

AIRCRAFT WAS GROUNDED: APU GENERATOR OFFLINE EICAS AND SWITCH NON NORMAL CHECKLIST COMPLETED UNSUCCESSFULLY. AIRCRAFT DIVERTED TO LHR LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED APU GENERATOR IAW AMM 24-21-01-400-801.

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