# SDR 99ZZZX4548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 2, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N6624B](https://openairdocs.org/aircraft/N6624B), registered now
- Make and model: Beech F33A
- Registry model: [Beech F33A](https://openairdocs.org/model/beech-f33a) (OpenAirDocs)
- Aircraft serial: CE1034
- Engine: Cont IO520BB
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 635448
- Condition: Worn
- Location: Nr'S 2 & 4
- Part time: 304 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/99ZZZX4548

## Discrepancy

AT 303.67 HOURS, THESE CYLINDERS HAD WORN OUT BORES AND EXHAUST VALVE GUIDES WORN BEYOND SERVICEABLE LIMITS.  THE ENGINE WAS FACTORY REBUILT/ZERO TIMED 1995.

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