# SDR UALA2013052203542

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 2013
- Submitted: July 26, 2013
- Operation: Air carrier
- Aircraft: [N524UA](https://openairdocs.org/aircraft/N524UA), registered now
- Make and model: Boeing 757222
- Aircraft serial: 24977
- Aircraft time: 73,203 hours, 27,061 cycles
- Engine: Pwa PW2040
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: M734284AF
- Part serial: 1137
- Condition: Failed
- Location: Nr 1
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013052203542

## Discrepancy

LEFT AC BUS FAILURE, RTFL.  REPLACED NR 1 GCU.

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