# SDR UALA2010102203900

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 21, 2010
- Submitted: October 25, 2010
- Operation: Air carrier
- Aircraft: [N786UA](https://openairdocs.org/aircraft/N786UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26938
- Aircraft time: 59,506 hours, 8,702 cycles
- Engine: Pwa PW4090
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: 1701768
- Part serial: 499
- Condition: Faulty
- Location: Pos 1
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010102203900

## Discrepancy

ELEC BACKUP GEN LT BACKUP GENERATOR OFF DUE TO A PROTECTIVE TRIP. STATUS  MSG01- NOT ACTIVE CRUISE MODE DEPENDENT; BACKUP GENERATOR (L) TEMPERATURE IS HIGH. DB- BACKUP CONVERTER MSG02- ACTIVE CRUISE MODE DEPENDENT; BACKUP GENERATOR (L) TEMPERATURE IS HIGH. MSG-2446120 INACTV ER MODE MSG-2446120 ACTIVE ER MODE. REPLACED LT BACK UP GEN WITH JAL BORROW PART. BUG OPS CK OK WITH ENG RUN.

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