# SDR HYIA20121210001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2012
- Submitted: December 10, 2012
- Operation: Air carrier
- Aircraft: [N67886](https://openairdocs.org/aircraft/N67886), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0435
- Aircraft time: 30,340 hours
- Engine: Cont TSIO520VB
- System (JASC): [8550 · Reciprocating Engine Oil System](https://openairdocs.org/jasc/8550)
- Part: B-Nut
- Condition: Leaking
- Location: Engine Oil
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20121210001

## Discrepancy

THE PILOT REPORTED A STEADY LOSS OF RT ENGINE OIL PRESSURE AFTER TAKEOFF.  ENGINE SHUTDOWN AND FEATHERED BEFORE OIL PRESSURE REACHED THE RED LINE.  DIVERTED BACK TO THE DEPARTURE.  DURING MX INSPECTION,   A LOOSE B-NUT WAS ALSO FOUND ON THE OIL PRESSURE LINE TO THE WASTE GATE. B-NUT TIGHTENED, AND ACFT RELEASED FOR SERVICE.

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