# SDR ABXA20260629290

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2026
- Submitted: June 29, 2026
- Operation: Air carrier
- Aircraft: N493MM
- Make and model: Boeing 767-300
- Registry model: [Boeing 767-300](https://openairdocs.org/model/boeing-767-300) (OpenAirDocs)
- Aircraft serial: 67025
- Aircraft time: 11,718 hours, 1,964 cycles
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: 734284F
- Part serial: AABA007327
- Condition: Defective
- Location: Zone 200
- Part time: 11,718 hours, 1,964 cycles
- Stage of operation: TO
- How discovered: O
- Nature of condition: J
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260629290

## Discrepancy

ON TAXI OUT, R GEN OFF EICAS MESSAGE APPEARED WITHIN 1-2 SECONDS OF TAKEOFF POWER APPLICATION. A/C ABORTED TAKE OFF (ATO) AND RETURNED TO GATE (BTB). MTX GROUNDED A/C AND TROUBLESHOT. REMOVED AND REPLACED R/H GCU IAW AMM 24-22-02. OPS CHECK GOOD. PERFORMED IDLE RUN AND IDG OPS GOOD WITH .51 LOAD IAW AMM 71-00-00. A/C REMAINS NO ETOPS. RETURNED A/C TO SERVICE.

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