# SDR 97ZZZX271

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N26150](https://openairdocs.org/aircraft/N26150), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0111
- Engine: Cont TSIO520UB
- System (JASC): [8550 · Reciprocating Engine Oil System](https://openairdocs.org/jasc/8550)
- Part: Plunger
- Part number: 642336
- Condition: Fod Malfunction
- Location: Oil Press Relief
- Component: 642224
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX271

## Discrepancy

MECHANIC NOTICED THAT OIL PRESSURE DROPPED TO ZERO WHEN THROTTLE WAS RETARDED.  FOUND 3 PIECES OF SAFETY WIRE STUCK UNDER OIL PRESSURE RELIEF VALVE.  REMOVED THE WIRE AND OPS CHECKED GOOD.

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