# SDR 2006FA0000751

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 13, 2006
- Submitted: August 9, 2006
- Operation: General aviation
- Aircraft: [N461SA](https://openairdocs.org/aircraft/N461SA), registered now
- Make and model: Snias AS350B2
- Aircraft serial: 3605
- Engine: Tmeca ARRIEL1D1
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Spring
- Part number: 350A310033KIT7
- Condition: Broken
- Location: Vibration Absorb
- Part time: 2,130 hours
- Component: Vibration Absor
- Component part number: 350A310033006
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2006FA0000751

## Discrepancy

PILOT REPORTED EXCESSIVE CABIN VIBRATION AT FULL POWER WHILE ON THE GROUND.  VIBRATION SUBSIDED IN A HOUR AND THROUGHOUT THE FLIGHT ENVELOPE.  DISASSEMBLY AND INSPECTION REVEALED 1 OF 3 SPRINGS IN VIBRATION ABSORBER OF MAIN ROTOR CRACKED ALL THE WAY THROUGH.  COMPLIED WITH 2500 HR INSPECTION OF VIBRATION ABSORBER JAW MFG MAINT WORK CARDS AND SERVICING RECORDS.  REPLACED ALL 3 SPRINGS AND PN EN2023R12L.  BEARINGS WHICH HAD EXCESSIVE PLAY.  REINSTALLED AN AIRCRAFT AND VIBRATION WAS ELIMINATED.  (K)

---
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.