# SDR DXTA2025122306234

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2025
- Submitted: January 9, 2026
- Operation: Air carrier
- Aircraft: [N865QS](https://openairdocs.org/aircraft/N865QS), registered now
- Make and model: Textrn TEXTRON700
- Aircraft serial: 7000117
- Aircraft time: 2,096 hours, 1,267 cycles
- Engine: Hnywl AS90721S
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Engine
- Part number: 700410111
- Condition: Faulty
- Stage of operation: DE
- How discovered: O
- Nature of condition: E
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2025122306234

## Discrepancy

AFTER AN IDLE POWER DESCENT DURING THE LEVEL OFF & ENG POWER UP, FELT A VIBRATION ALONG WITH A NOISE FROM REAR OF ACFT.  RECEIVED AN AMBER ENG VIB R CAS MSG. NOTICED A BURNING OR EXHAUST ODOR IN CABIN. PERFORMED QRH FOR  ENG VIB R CAS WHICH LED TO REDUCE POWER. ENGINE VIB STILL FELT & CAS MSG STILL DISPLAYED. FOLLOWED QRH,  DIRECTED TO SHUT THE AFFECTED ENG DOWN.  PERFORMED A SINGLE ENG LANDING WITH NO FURTHER ISSUES.  TROUBLESHOT ENG VIBRATION. TRIED TO TURN FAN (N1) & IT VERY ROUGH TURNING & GRINDING. TRIED TURN N2 THROUGH PMA & WAS LOCKED . CHKD CHIP DETECTOR & FOUND A FEW PIECES OF DEBRIS. INSPECTED 4 DEBRIS MONITORS & FOUND  2 IN THE CENTER OF GEARBOX WITH DEBRIS. REMOVED NR 1 ENGINE. N1 MAKES NOISES WHEN TURNED & N2 DOESN'T ROTATE. IAW WITH AMM 71-00-01 & LMM 72-05-25. INSTALLED AN INSPECTED ENGINE IAW AMM  71-00-01 AND  LMM 72-05-25. SERVICED ENGINE. PERFORMED GROUND RUNS FOR LEAK CHECKS AND PERFORMANCE RUN IAW AMM 71-00-01 AND LMM 72-05-25.

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