# SDR UALA2011090704850

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 3, 2011
- Submitted: September 9, 2011
- Operation: Air carrier
- Aircraft: [N781UA](https://openairdocs.org/aircraft/N781UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26945
- Aircraft time: 61,717 hours, 10,966 cycles
- Engine: Pwa PW4077
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 767146A
- Part serial: 10639
- Condition: Faulty
- Location: Right
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011090704850

## Discrepancy

MAT SHOWS MESSAGE "INTEGRATED DRIVE GENERATOR (R) EXCITER FIELD CURRENT IS OUT OF RANGE" (24-31612).  REPLACED WITH NEW IDG, OPERATIONAL TEST OK PER AMM.  POWER PLANT NR 3 OK.

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