# SDR FQAR20150528063

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2015
- Submitted: June 1, 2015
- Operation: General aviation
- Aircraft: [N443PA](https://openairdocs.org/aircraft/N443PA), registered now
- Make and model: Piper PA-28-181
- Registry model: [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181) (OpenAirDocs)
- Aircraft serial: 2843499
- Aircraft time: 17,067 hours
- Engine: Lyc O360A4M
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Tappet
- Part number: 15B26262
- Condition: Flattened
- Location: Nr 4 Cylinder
- 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/FQAR20150528063

## Discrepancy

DURING THE REMOVAL OF A CYLINDER, THE TECH WAS TRYING TO REMOVE THE HYDRAULIC LIFTER ASSY WHEN HE FELT SOMETHING ROUGH INSIDE THE CRANKCASE.  VISUAL INSPECTION REVEALED THE CYLINDER-FACING END OF THE NR 4 CYLINDER EXHAUST TAPPET WAS IN PIECES.  THERE HAD BEEN NO ABNORMAL OIL ANALYSIS READINGS NOR ANY METAL SEEN IN THE OIL FILTER PRECEDING THIS DISCOVERY.

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