# SDR SIMA200706402

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2007
- Submitted: March 5, 2007
- Operation: Air carrier
- Aircraft: N390AE
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B390
- Aircraft time: 18,488 hours, 22,492 cycles
- System (JASC): [2430 · DC Generating System](https://openairdocs.org/jasc/2430)
- Part: Gcu
- Part number: 51539007B
- Part serial: 97983
- Condition: Failed
- Location: Lt Engine
- Part time: 11,833 hours, 13,547 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA200706402

## Discrepancy

LEFT GENERATOR ANNUNCIATOR ILLUMINATED.  RESET UNSUCCESSFUL, PLACED SWITCH IN OFF POSITION.  DECLARED EMERGENCY.  REMOVED AND REPLACED GENERATOR CONTROL UNIT IAW SAAB 24-31-10.  OPERATIONAL TEST GOOD, RETURNED AIRCRAFT TO SERVICE.

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