# SDR Q2S2002F00000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2002
- Submitted: January 16, 2002
- Operation: Air carrier
- Aircraft: N743SA
- Make and model: Boeing 747230B
- Aircraft serial: 22671
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Generator
- Part number: 21B731E
- Part serial: 22671
- Condition: Failed
- Location: Nr 3
- Stage of operation: NR
- How discovered: O
- Nature of condition: H, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/Q2S2002F00000

## Discrepancy

AIR TURN BACK: AFTER T/O NR 3 GEN FIELD OFF ILLUMINATED ATTEMPTED TO RESET IAW CARRIER PROCEDURES AND FAILED CSD DISC PROC ACCOMPLISHED.  T/S SYS PER AMM FOUND NR 3 GCU FAULTY.  REMOVED AND REPLACED GCU IAW AMM.  OPS CHECK GOOD.

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