# SDR ABXA20260429181

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2026
- Submitted: April 30, 2026
- Operation: Air carrier
- Aircraft: [N651GT](https://openairdocs.org/aircraft/N651GT), registered now
- Make and model: Boeing 767231
- Aircraft serial: 22570
- Aircraft time: 92,057 hours, 28,584 cycles
- Engine: Pwa JT9D7R4D
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Condition: Vibration
- Location: Left
- Stage of operation: TX
- How discovered: O
- Nature of condition: E
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260429181

## Discrepancy

VERY HEAVY VIBRATION FROM LEFT ENGINE DURING ENGINE START UP & TAXI. DID ENGINE RUN UP & IT GOT WORSE. NO BAD ENGINE INDICATIONS ON EICAS. A/C RETURNED TO BLOCKS (BTB). AIRCRAFT FREIGHT LOAD IS LIGHT AT 15,500. PERFORMED ENGINE IDLE RUN AND BREAK AWAY POWER RUN UP OF BOTH ENGINES IAW AMM 71-00-00, WITH EEC'S ON AND OFF. ALL INDICATIONS NORMAL, NO VIBRATIONS NOTED. PERFORMED GVI INSP WITH NO DEFECTS NOTED. A/C OK FOR SVC. A/C REMAINS NO ETOPS.

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