# SDR 2026FA0000666

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2026
- Submitted: August 26, 2026
- Operation: General aviation
- Make and model: Boeing 737-86J
- Registry model: [Boeing 737-86J](https://openairdocs.org/model/boeing-737-86j) (OpenAirDocs)
- Aircraft serial: 37746
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: 762185H
- Condition: Intermittent
- Location: Zone 100
- Stage of operation: CR
- 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/2026FA0000666

## Discrepancy

DIVERTED FLIGHT TO SLCB IN LEGVVI-LPB FLIGHT 677 DUE TO AC GENERATOR FAIL (FRM 241 010 01 - GEN1 DRIVE LIGHT ILLUMINATED) TOGETHER WITH APU LOW OIL PRESS LIGHT FRM 492 060 00. CORRECTIVE ACTION: PERFORMED FIM 24-11 TASK 801 AND SWAPPED GCU1 WITH GCU2. OPERATIONAL TEST NORMAL. FOR APU: PERFORMED FIM 49-90 TASK 803. OPERATIONAL TEST NORMAL.

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