# SDR SWAA050850

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2005
- Submitted: March 22, 2005
- Operation: Air carrier
- Aircraft: [N674AA](https://openairdocs.org/aircraft/N674AA), registered now
- Make and model: Boeing 737-3A4
- Registry model: [Boeing 737-3A4](https://openairdocs.org/model/boeing-737-3a4) (OpenAirDocs)
- Aircraft serial: 23252
- Aircraft time: 58,434 hours, 49,482 cycles
- System (JASC): [2420 · AC Generation System](https://openairdocs.org/jasc/2420)
- Part: Gcu
- Part number: 106122411
- Part serial: TH1109
- Condition: Faulty
- Location: Nr 2
- Stage of operation: CL
- 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/SWAA050850

## Discrepancy

AIR TURNBACK - DECLARED EMERGENCY.  OBSERVED SMOKE FROM BEHIND F/O'S SEAT.  NR 2 GCU FAILED.  REMOVED AND REPLACED NR 2 GCU PER MM.

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