# SDR 95ZZZX2720

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N300JM](https://openairdocs.org/aircraft/N300JM), registered now
- Make and model: Cessna 340A
- Registry model: [Cessna 340A](https://openairdocs.org/model/cessna-340a) (OpenAirDocs)
- Aircraft serial: 340A0233
- Engine: Cont TSIO520N
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Condition: Defective
- Location: Engine
- Part time: 3,527 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/95ZZZX2720

## Discrepancy

AT OVERHAUL, 5 CYLINDERS WERE CERAMICHROME AND 1 WAS CHANNELCHROME.  AT THE 100-HOUR INSPECTION. COMPRESSION WAS HIGH 60'S ON THE CERAMICHROME, 77 ON THE CHANNELCHROME.  A PRE-BUY INSPECTION WAS DONE 2 HOURS LATER AND THE COMPRESSION DROPPED 20 POUNDS ON THE CERAMICHROME.  THIS PROBLEM IS CONSISTENT ON CERAMICHROME CYLINDERS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.