# SDR CA040721003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2004
- Submitted: January 5, 2005
- Operation: General aviation
- Make and model: Namer HARVARDMK4
- Aircraft time: 6,721 hours
- Engine: Pwa S3H1
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Piston
- Part number: PN15373
- Condition: Broken
- Location: Nr 1 Cylinder
- Stage of operation: TO
- How discovered: B
- Nature of condition: O
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA040721003

## Discrepancy

PILOT EXPERIENCED PARTIAL POWER INTERUPTION ON TAKEOFF.  ABORTED TAKEOFF.  BORESCOPE INSPECTION DISCOVERED BROKEN PISTON IN NR 1 CYLINDER.  PISTON REPLACED WITH OVERHAULED ASSEMBLY AND ENGINE RE-ASSEMBLED AND TESTED SERVICEABLE.

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