# SDR ASAA2017051120726

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2017
- Submitted: May 15, 2017
- Operation: Air carrier
- Aircraft: [N495AS](https://openairdocs.org/aircraft/N495AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41728
- Aircraft time: 4,888 hours, 1,634 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 761574B
- Part serial: AAAH011988
- Condition: Failed
- Location: Nr 1
- Part time: 4,895 hours, 1,637 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017051120726

## Discrepancy

DURING FINAL APPROACH,  RECEIVED A  SOURCE OFF LIGHT FOR THE NR 1 ENGINE.   RAN CHECKLIST, THE GENERATOR DID NOT COME BACK ONLINE. USED APU.  NO VOLTS OR FREQ'S ON GEN 1. DRIVE LIGHT WAS NOT ON.   ACFT  GROUNDED.  REPLACED THE NR 1 ENGINE IDG IAW AMM 24-11-11. OPS CHECKED ACCOMPLISHED. OPS CHECKED GOOD.

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