# SDR WVBA00500

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2000
- Submitted: June 26, 2000
- Operation: General aviation
- Aircraft: [N59764](https://openairdocs.org/aircraft/N59764), 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: 317652037
- Engine: Lyc TIO540J2BD
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Camshaft
- Part number: LW19340
- Condition: Damaged
- Location: Nr1,2 Intakelobe
- 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/WVBA00500

## Discrepancy

DURING INSPECTION, BOTH CYLINDERS NR 1 AND NR 2 HAD LOW COMPRESSION.  UPON REMOVING CYLINDERS INTAKE LOBES OF CAMSHAFT HAD EXTREME WEAR.  THE TAPPET FACES WERE ALSO SPALLED.  OVER PAST YEAR, THERE HAS BEEN FOUR SIMILAR PROBLEMS.  SUBMITTER SUSPECTED PROBLEM IN MANUFACTURING PROCESS.  (X)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.