# SDR UALA2012072403998

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2012
- Submitted: July 26, 2012
- Operation: Air carrier
- Aircraft: N545UA
- Make and model: Boeing 757222
- Aircraft serial: 25323
- Aircraft time: 78,088 hours, 22,619 cycles
- Engine: Pwa PW2037
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Heat Exchanger
- Part number: 471111172
- Part serial: 16
- Condition: Failed
- Location: Nr 1 Generator
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012072403998

## Discrepancy

LEFT GENERATOR DRIVE LIGHT ILLUMINATED TWICE FOR 3 MINUTES EACH THEN NORMAL OPS THEREAFTER.  SUPPLEMENTAL DATA UPDATE, NR 1 ENG GEN INOPERATIVE.  REPLACED FUEL OIL HEAT EXCHANGER PER MM.  RAN ENG, POS CHECK GOOD.

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