# SDR CA960103532

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Engine: Lyc O540E4B5
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve Seat
- Condition: Wrong Depth
- Location: Cylinder
- Stage of operation: IN
- Nature of condition: R
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA960103532

## Discrepancy

(CAN)AFTER THE ENGINE WAS OVERHAULED, WITH SIX (6) NEW CYLINDERS FROM CONTINENTAL, THE ENGINE FAILED TO ACHIEVE FULL POWER ON THE POST INSPECTION/OVERHAUL RUN-UP. THE MAXIMUM RPM WAS 2700, INSTEAD OF THE REQUIRED 2850 RPM. TROUBLESHOOTING REVEALED THAT ONE OF THE INTAKE VALVE SEAT WAS 1/8 OF AN INCH DEEPER IN THE HEAD THAN THE OTHER FIVE. THE CYLINDER WAS REPLACED AND THE PROPER ENGINE RPM WAS ACHIEVED AT FULL POWER.

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