# SDR 2026FA0000340

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2026
- Submitted: May 8, 2026
- Operation: General aviation
- Aircraft: [N651MC](https://openairdocs.org/aircraft/N651MC), registered now
- Make and model: Agusta AW119MKII
- Registry model: [Agusta AW119MKII](https://openairdocs.org/model/agustawestland-philadelphia-aw119mkii) (OpenAirDocs)
- Aircraft serial: 15021
- Aircraft time: 470 hours
- Engine: Pwa PT6B37A
- Engine time: 470 hours, 1,954 cycles
- System (JASC): [7900 · Engine Oil System (Airframe Furnished)](https://openairdocs.org/jasc/7900)
- Part: Bypass Valve
- Part number: 727029
- Part serial: 1127
- Condition: Failed
- Location: Zone 200
- Part time: 470 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: M, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026FA0000340

## Discrepancy

PILOT EXPERIENCED A RISE IN TEMPERATURE DURING FLIGHT, UP TO 114 CELCIUS. PILOT REDUCE POWER AND AIRSPEED TO UNLOAD ENGINE TO AID IN COOLING. ENGINE OIL TEMP REACHED 115 CELCIUS AND PILOT INITIATED PEL. PART CONFIRMED FAILED, REPLACED WITH NEW PART, OPS CHECK SAT.

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