# SDR 95ZZZX1001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N2420B](https://openairdocs.org/aircraft/N2420B), registered now
- Make and model: Univac GC1B
- Aircraft serial: 3720
- Engine: Cont O300A
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 641917
- Condition: Guide Failed
- Location: Exhaust Valve
- Part time: 1,800 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/95ZZZX1001

## Discrepancy

ACFT OWNER'S BOOK ON THE O300A CALLS FOR 80/87 FUEL.  HOWEVER, THE LEAD HAS BEEN REMOVED FROM 80/87, SO NO LUBRICATION COULD TAKE PLACE.  CONTINENTAL USES LEAD IN THE FUEL FOR LUBE.  VALVE GUIDES TOTALLY WORE OUT CAUSING LOW COMPRESSION AND HIGH OPERATION TEMPERATURES.

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