# SDR WVBA2001010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2001
- Submitted: March 13, 2001
- Operation: Air carrier
- Aircraft: [N4082T](https://openairdocs.org/aircraft/N4082T), registered now
- Make and model: Piper PA-31-350
- Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (OpenAirDocs)
- Aircraft serial: 318152089
- Engine: Lyc TIO540J2BD
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Camshaft
- Part number: LW19430
- Condition: Damaged
- Location: Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WVBA2001010

## Discrepancy

DURING INSPECTION, METAL CONTAMINATION WAS DISCOVERED IN OIL FILTER.  A CHECK OF VALVELIFT WAS DONE AND IT WAS DISCOVERED THAT NR5 AND NR6 INTAKE LOBES WERE EXCESSIVE.  NR6 CYLINDER WAS REMOVED AND DAMAGE OBSERVED ON THE CAM LOBES AND TAPPET FOLLOWERS.   NOTE: THIS IS THE 14TH ENGINE IN 3 YEARS.  LUBRICATION PRACTICES HAVE BEEN MONITORED/ POOR QUALITY CONTROL ON NITRIDING.

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