# SDR ASAA2016072117464

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2016
- Submitted: July 25, 2016
- Operation: Air carrier
- Aircraft: [N564AS](https://openairdocs.org/aircraft/N564AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35103
- Aircraft time: 37,495 hours, 11,435 cycles
- System (JASC): [2410 · Alternator-Generator Drive](https://openairdocs.org/jasc/2410)
- Part: Module
- Part number: 233A32041
- Part serial: D02187
- Condition: Failed
- Location: Nr 2 Engine
- Part time: 37,496 hours, 11,436 cycles
- Stage of operation: DE
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016072117464

## Discrepancy

DURING IDLE DESCENT PASSING FL 250 RIGHT GENERATOR DROPPED OFF LINE.  WOULD NOT RESET.  ACFT GROUNDED.  REPLACED THE NR 2 IDG IAW AMM 24-11-11-401. OPS CHECKED GOOD.  LEAK CHECKED GOOD.  PERFORMED UNSCHEDULED IDG REMOVAL FOR CAUSE IAW AMM 24-11-11-080-801.  WHILE TROUBLESHOOTING FOUND HIGH RESISTANCE ACROSS "GEN 2 " SWITCH IN OFF POSITION.  REPLACED P5-4 PANEL ASSY IAW AMM 24-21-51-400-801.  ACCOMPLISHED OPERATIONAL TEST FOR THE AC GENERATION AND CONTROL SYSTEM. ALL TESTS PASSED IAW AMM 24-21-00-700-803.

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