# SDR ASAA11510384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2011
- Submitted: September 20, 2011
- Operation: Air carrier
- Aircraft: [N560AS](https://openairdocs.org/aircraft/N560AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35179
- Aircraft time: 19,393 hours, 6,036 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 761574B
- Part serial: AAAH004564
- Condition: Malfunctioned
- Location: Nr 1 Engine
- Part time: 19,405 hours, 6,040 cycles
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA11510384

## Discrepancy

LEFT (GEN 1) "SOURCE OFF" LIGHT ILLUMINATED ON DESCENT AT 20 000 FT.  REF FIM TASK 24 21 00 GCU BITE TST SHOWS NR 1 IDG FAULT.  NR 1 GCU LRU BITE TEST OK.  NR 1 IDG REQUIRES REPLACEMENT REF. FIM TASK 24 21 TSK 806.  REPLACED NR 1 IDG PER MM 24 11 11.  COMPLETED OPERATION TEST PER 24 11 00 OPS NORMAL.

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