# SDR CA961223004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Cessna 421C
- Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Engine: Cont GTSIO520L
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 642343CN
- Condition: Separated
- Location: #1 Cylinder
- Part time: 415 hours
- Stage of operation: CL
- Nature of condition: B, E, K
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA961223004

## Discrepancy

(CAN) DURING CLIMBOUT THE #1 ENGINE HAD A LOSS OF POWER FOLLOWED BY ROUGH RUNNING. ON RETURN TO THE AIRPORT OIL WAS NOTICED ESCAPING THROUGH THE #1 ENGINE COWLING. POST FLIGHT INSPECTION FOUND THE #1 CYLINDER HEAD LYING IN THE COWLING. THE CYLINDER WAS REMOVED; THE OIL DRAINED; THE ENGINE AND FILTERS WERE CHECKED FOR DAMAGE. A NEW #1 CYLINDER WAS INSTALLED AND THE AIRCRAFT RETURNED TO SERVICE.

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