# SDR S2YA05044

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2005
- Submitted: September 20, 2005
- Operation: Air carrier
- Aircraft: [N891SK](https://openairdocs.org/aircraft/N891SK), registered now
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE89
- Engine: Pwa PT6A67D
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Pressure System
- Part number: PT6A67D
- Part serial: PCE114233
- Condition: Fluctuates
- Location: Rt Engine Oil
- Part time: 21,547 hours
- 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/S2YA05044

## Discrepancy

SHORTLY AFTER TAKEOFF, THE CREW REPORTED THE OIL PRESSURE DROPPED TO ABOUT 40 PSI ACCOMPANIED BY A TEMPERATURE INCREASE TO 800 DEGREES AND TORQUE FLUCTUATIONS.  THE CREW PERFORMED AN AIR-TURN-BACK.  MAINTENANCE INSPECTED THE AC AND REPLACED THE RT ENGINE. WITH ALL OPS CHECKS GOOD, THE AC WAS RETURNED TO SERVICE.  (K)

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