# SDR 97ZZZX3545

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N117LB](https://openairdocs.org/aircraft/N117LB), registered now
- Make and model: Aerosp AS 355F1
- Registry model: [Aerosp AS 355F1](https://openairdocs.org/model/aerospatiale-as-355f1) (OpenAirDocs)
- Aircraft serial: 5057
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Starflex
- Part number: 350A31190703
- Condition: Debonded
- Location: Star Arm Bush
- Part time: 91 hours
- Stage of operation: IN
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX3545

## Discrepancy

PILOT REPORTED MAIN ROTOR VIBRATION.  INSPECTION REVEALED YELLOW STAR ARM BUSHING DE-BONDED AND MOVED OUTBOARD.  FURTHER INSPECTION REVEALED CRACK UNDER BUSHING IN COMPOSITE MATERIAL.  PART LASTED 90.5 HOURS AND IS LIFE LIMITED AT 2,220 HOURS.  PREVIOUS PART LASTED ONLY 673.4 HOURS AND HAD A SIMILAR FAILURE.

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