# SDR V79R2026090600629

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 5, 2026
- Submitted: August 7, 2026
- Operation: General aviation
- Aircraft: [N728TK](https://openairdocs.org/aircraft/N728TK), registered now
- Make and model: Robsin R22BETA
- Aircraft serial: 4936
- Aircraft time: 49 hours
- Engine: Lyc O360J2A
- Engine time: 49 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Pushrod
- Part number: 15F2883530
- Condition: Scored
- Location: Engine
- Part time: 49 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/V79R2026090600629

## Discrepancy

THIS IS THE FOURTH FACTORY NEW AIRCRAFT WE HAVE RECEIVED IN A ROW FROM ROBINSON HELICOPTER CO WITH THIS ISSUE. ALL PUSHRODS AND ROCKER ARMS WERE FOUND TO BE SORED AT THE MATING SURFACE. PARTS HAVE SINCE BEEN SENT TO RHC AND WE ARE WAITING FOR REPLACEMENT PARTS. WE BELIEVE THAT THIS IS CAUSED BY A LACK OF LUBRICATION AT THIS MATING SURFACE DURING INITIAL RUN UPS OR THE DE-PICKLING PROCESS.

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