# SDR ECPR2018032807067

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2017
- Submitted: March 28, 2018
- Operation: General aviation
- Filed by: [Skyborne Airline Academy Inc, repair station ECPR466D](https://openairdocs.org/faa-repair-station/ECPR466D/skyborne-airline-academy-inc.md) (OpenAirDocs)
- Aircraft: N9247V
- Make and model: Piper PA-28-161
- Registry model: [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161) (OpenAirDocs)
- Aircraft serial: 2841255
- Aircraft time: 16,088 hours
- Engine: Lyc O320D3G
- Engine time: 7,447 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Exhaust Valve
- Part number: 17B23936
- Condition: Worn
- Location: Nr 2 Cylinder
- Part time: 1,784 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ECPR2018032807067

## Discrepancy

DURING A SCHEDULED INSPECTION IT WAS FOUND THAT THE NR 2 ENGINE CYLINDER HAD LOW COMPRESSION.  INVESTIGATION FOUND THAT THE EXHAUST VALVE FACE AND EXHAUST SEAT INTERFACE SHOWED EXCESSIVE WEAR CAUSING THE EXHAUST VALVE FACE TO CUP.

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