# SDR CA031110006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2003
- Submitted: January 5, 2004
- Operation: General aviation
- Make and model: Skrsky S58ET
- Aircraft time: 9,521 hours
- Engine: Pwa PT6T3
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Piston Rod
- Part number: S161026005
- Condition: Severed
- Location: Damper Assy
- Component: Damper Assy, Skrsky, S161026000
- Stage of operation: LD
- How discovered: O
- Nature of condition: D
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA031110006

## Discrepancy

(CAN) ON AIRCRAFT APPROACH FOR LANDING, AIRFRAME VIBRATION WAS FELT.  UPON LANDING AIRCRAFT WAS GROUND ROCKING.  REDUCTION OF ENGINE THROTTLES INCREASED GROUND ROCK AND AIRFRAME VIBRATION. THROTTLES SHUT-OFF AND ROTOR BRAKE APPLIED, UPON BRAKING M/R BLADE SWEPT FORWARD.  INVESTIGATION FOUND M/R DAMPER PISTON ROD SEVERED AT THREADED PORTION.  DAMPER PISTON ROD SENT OUT FOR METALLURGY TESTING.

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