# SDR ABXA20260331141

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N1321A](https://openairdocs.org/aircraft/N1321A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27957
- Aircraft time: 99,028 hours, 24,827 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: 734284F
- Part serial: 5874
- Condition: Defective
- Location: Generator
- Stage of operation: CL
- 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/ABXA20260331141

## Discrepancy

L AC BUS OFF AT TOP OF CLIMB OUT FROM  CVG BOUND FOR MHT.  CREW RAN THROUGH THE QRH AND RESET EVERYTHNING.  THEY DECLARED AN EMERGENCY (EDC) AND RETURNED TO CVG WITHOUT INCIDENT. (ATB).  MAINTENANCE REMOVED AND REPLACED GCU IAW AMM 24-22-02. OPS CHECK GOOD AC REMAINS ETOPS 180. AIRCRAFT RETURNED TO SERVICE.

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