# SDR 95ZZZX1460

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N1096W](https://openairdocs.org/aircraft/N1096W), registered now
- Make and model: Beech F33A
- Registry model: [Beech F33A](https://openairdocs.org/model/beech-f33a) (OpenAirDocs)
- Aircraft serial: CE436
- Engine: Cont IO520BA
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 538288
- Condition: Guide Loose
- Location: Nr 1
- 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/95ZZZX1460

## Discrepancy

DURING A ROUTE INPSECTION, NR 1 CYLINDER DISPLAYED LOW COMPRESSION.  FURTHER INVESTIGATION, AFTER REMOVAL OF CYLINDER, REVEALED A LOOSE VALVE GUIDE IN THE CYLINDER HEAD.  THIS ENGINE HAD BEEN OVERHAULED 70.0 HOURS PREVIOUS TO THE INSPECTION.  CAUSE:  INCORRECT TOLERANCES ON INSTALLATION. PREVENTION:  INSPECTION OF GUIDES AFTER 100 HOURS OF OPERATION.

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