# SDR 2005FA0001329

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2005
- Submitted: September 26, 2005
- Operation: General aviation
- Aircraft: N93AF
- Make and model: Cessna 172R
- Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (OpenAirDocs)
- Aircraft serial: 17280073
- Aircraft time: 8,521 hours
- Engine: Lyc IO360L2A
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Pressure Switch
- Part number: 83278
- Condition: Blown
- Location: Oil System
- Part time: 5,321 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0001329

## Discrepancy

ORIGINAL OIL PRESSURE SWITCH HAD BEEN REPLACED PER SB SB00-79-01.  THE REPLACEMENT SWITCH P/N 83278 FAILED ALLOWING ENGINE OIL TO PASS THROUGH SWITCH AND VENT OVERBOARD.  NTSB ACCIDENT NUMBER IS DFW05CA219.

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