# SDR UALA2010032200957

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2010
- Submitted: March 22, 2010
- Operation: Air carrier
- Aircraft: [N215UA](https://openairdocs.org/aircraft/N215UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30221
- Aircraft time: 34,818 hours, 7,617 cycles
- Engine: Pwa PW4077
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: 756589A
- Part serial: 216
- Condition: Malfunctioned
- Location: Apu
- 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/UALA2010032200957

## Discrepancy

APU GENERATOR TRIPS.  APU GEN INOP, NO ELECTRICAL BACKUP STATUS MESSAGES.  REPLACED GENERATOR CONTROL UNIT.  GCU OP CHECKS GOOD.  APU GENERATOR OPS CHECKS GOOD.  RE-OPENED BY OPBLM FOR HIT AGAIN AT DEPARTURE.  REPLACED APU GEN PER MM.  OPS CHECK GOOD WITH 70 PERCENT LOAD.

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