# SDR CA030813AAA

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 13, 2003
- Submitted: November 3, 2003
- Operation: General aviation
- Make and model: Namer HARVARDMK4
- Aircraft time: 6,647 hours
- Engine: Pwa S3H1
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Piston
- Part number: 15373
- Condition: Damaged
- Location: Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: P
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA030813AAA

## Discrepancy

(CAN) AT INSPECTION, A VERY SMALL AMOUNT OF FERROUS MATERIAL FOUND IN PRESSURE FILTER.ADDITIONAL INSPECTION FOUND A PISTON WITH BROKEN TOP COMPRESSION RING.INSPECTION OF OTHER PISTONS FOUND THEM TO HAVE BEEN WORN BEYOND LIMITS IN THE TOP RINGGROOVE WIDTH.  WORN PISTONS WERE REPLACED WITH NEW.

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