# SDR UALA2012032601928

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2012
- Submitted: April 5, 2012
- Operation: Air carrier
- Aircraft: [N664UA](https://openairdocs.org/aircraft/N664UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29236
- Aircraft time: 48,800 hours, 13,204 cycles
- Engine: Pwa PW4056
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Generator
- Part number: S281T00137
- Part serial: 159
- Condition: Faulty
- Location: Apu
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012032601928

## Discrepancy

APU GENERATOR WILL NOT ACCEPT POWER.  APU GENERATOR STAYS ON ABOUT 3 SECONDS, THEN TRIPS.  VERIFIED HMG OPERATES NORMALLY PER AMM.  BPCU BITE SHOWS GENERATOR DIODE IS OPEN AND CHANGING GCU, NO HELP.  RPELACED APU GENERATOR.  OPERATION CHECKED NORMAL.

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