# SDR ASAA2015060912039

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2015
- Submitted: June 11, 2015
- Operation: Air carrier
- Aircraft: [N594AS](https://openairdocs.org/aircraft/N594AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35191
- Aircraft time: 27,762 hours, 8,474 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 761574B
- Part serial: AAAH004750
- Condition: Failed
- Location: Nr 1 Generator
- Part time: 23,304 hours, 7,608 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2015060912039

## Discrepancy

AFTER STARTING LT ENGINE-GENERATOR WOULD NOT COME ON LINE -NEGATIVE FREQUENCY AND VOLTS.  ACFT GROUNDED.  AFTER ENG RUN FOUND NO SOURCE VOLTS, FREQUENCY WITH GCU FAULT 1 IDG.  R & R 1 ENGINE IDG REF MM 24-11-11-000-801 AND 24-11-00-700-802.

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