# SDR UALA2012091005065

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 8, 2012
- Submitted: October 5, 2012
- Operation: Air carrier
- Aircraft: N545UA
- Make and model: Boeing 757222
- Aircraft serial: 25323
- Aircraft time: 78,513 hours, 22,744 cycles
- Engine: Pwa PW2037
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Control Unit
- Part number: 734285D
- Part serial: 65
- Condition: Faulty
- Location: Lt Engine
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012091005065

## Discrepancy

ON TAXI OUT WITH BOTH ENGINES RUNNING BOTH GENERATOR TRIPPED OFF LINE.  REPLACED BPCU & CLEANED LEFT ENGINE IDG FEEDER CABLE DISCONNECT CONTACTS D1092P & D1092J, PINS A & B, GMM 20-61-01.  ACP'D HIGH POWER RUNUP WITH ELECTRICAL LOAD & APU OFF.  LEFT & RIGHT GENERATORS OPERATED OK - VOLTS 115VAC, FREQ 400 TO 404 HZ.

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