# SDR ASAA2021031334285

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 13, 2021
- Submitted: March 17, 2021
- Operation: Air carrier
- Aircraft: [N403AS](https://openairdocs.org/aircraft/N403AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41730
- Aircraft time: 31,397 hours, 10,161 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Idg
- Part number: 761574B
- Part serial: AAAH009032
- Condition: Inoperative
- Location: Nr 2 Generator
- Part time: 31,431 hours, 10,171 cycles
- Stage of operation: TX
- 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/ASAA2021031334285

## Discrepancy

FLT CREW REPORTS DURING TAXI "DRIVE" LIGHT CAME ON FOR APPROX 1 MIN, WENT OUT, THEN BACK ON FOR APPROX 3 MIN, WENT OUT, THEN BACK ON FOR APPROX 5 MIN, ON #2 IDG. GROUNDED - YES. PERFORMED IDLE RUN OF ENG #2. #2 GEN OPERATED AS NORMAL DRIVE LIGHT REMAINED EXTINGUISHED. OIL QUANTITY AT FULL. PER B737-900 FIM TASK 24-11-00-810-802 PERFORMED BITE ON GCU 2. GCU 2 SHOWS IDG FAULT LIGHT. #2 IDG IS DISCONNECTED. REMOVED AND REPLACED #2 IDG, REF B737-900 AMM 24-11-11/401, NO OIL CONTAMINATION FOUND. ACCOMPLISHED TEST AMM 24-11-11-700-803 AND NO DEFECTS NOTED. GEN 2 DISCONNECT SWITCH GUARDED AND SAFETIED.

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