# SDR UALA2012010900195

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2012
- Submitted: January 26, 2012
- Operation: Air carrier
- Aircraft: [N773UA](https://openairdocs.org/aircraft/N773UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26929
- Aircraft time: 66,711 hours, 12,872 cycles
- Engine: Pwa PW4077
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Converter
- Part number: 757183F
- Part serial: 68
- Condition: Failed
- Location: Nr 1
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012010900195

## Discrepancy

ELECTRICAL BACKUP SYSTEM FAULT AFTER ENGINE START.  REPLACED CONVERTER PER MM. OPS CHECKED GOOD.

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