# SDR UALA2010080502847

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 5, 2010
- Submitted: August 6, 2010
- Operation: Air carrier
- Aircraft: N595UA
- Make and model: Boeing 757222
- Aircraft serial: 28748
- Aircraft time: 49,570 hours, 13,761 cycles
- Engine: Pwa PW2037
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: M734284DF
- Part serial: 258
- Condition: Faulty
- Location: Nr 2
- Stage of operation: TX
- How discovered: 9
- Nature of condition: J, O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010080502847

## Discrepancy

ON APPLICATION OF T/O POWER RT ENG TRIPPED OFF LINE WITH EICAS MSG.  SAMC TEXT: CREW REPORTS THAT RT IDG FREQ FLUCTUATES BETWEEN 419 TO 420 HZ AND THEN GOES BLANK AT IDLE.  REPLACED RT GEN CONTROL UNIT IAW MM.  ALSO ADJ IDG FREQUENCY 5 TURNS CW EQUAL TO 15 HZ, OP UT NOW READS 398 HZ IAW MM.  ALL OPS NORMAL.

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