# SDR WVBA201710120001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2017
- Submitted: October 12, 2017
- Operation: Air carrier
- Aircraft: [N234CE](https://openairdocs.org/aircraft/N234CE), 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: 318052203
- Aircraft time: 14,657 hours
- Engine: Lyc LTIO540J2BD
- Engine time: 11,170 hours
- Propeller: Hartzl HCE3YR2A
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Guide
- Part number: LW12966
- Part serial: AR45580
- Condition: Worn
- Location: Engine
- Part time: 1,454 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WVBA201710120001

## Discrepancy

EXHAUST VALVE GUIDE LEAKING OIL. LOSS OF COMPRESSION. FOUND POOLING OF EXCESS OIL IN ROCKER BOX CAVITY AND SIGNS OF EXHAUST BLOW-BY ON EXHAUST VALVE SPRINGS. THIS IS THE 4TH VALVE GUIDE TO EXIBIT EXCESSIVE WEAR
PROBLEM. THE CYLINDER WAS INSTALLED AS FACTORY NEW.

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