# SDR 95ZZZX6407

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 16, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N4565M](https://openairdocs.org/aircraft/N4565M), registered now
- Make and model: Piper PA-11
- Registry model: [Piper PA-11](https://openairdocs.org/model/piper-pa-11) (OpenAirDocs)
- Aircraft serial: 1168
- Engine: Cont C9012F
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Guide
- Part number: 653421
- Condition: Excess Worn
- Location: Nr 2,4 Cyls Exh
- Part time: 98 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX6407

## Discrepancy

OWNER REPORTED EXCESSIVE BLOW-BY.  COMPRESSION CHECK NR 2 - 52/80 AND NR 4 - 50/80.  EXHAUST VALVES LEAKING.  PISTONS HEAVY WITH CARBON BUILD-UP.  EXHAUST GUIDES WORN BEYOND TCM LIMITS.  SUBMITTER STATES THIS IS 4 OUT 10 CYLINDERS INSTALLED, ALL WITH LESS THAN 100 HOURS SINCE NEW.

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