# SDR 97ZZZX4711

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N58236
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53069
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Frahm Assy
- Part number: 407010150101A
- Condition: Worn
- Location: M/R
- Part time: 317 hours
- Stage of operation: NR
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX4711

## Discrepancy

RUBBER BOOT CAME LOOSE AND SPRINGS ROTATED INSIDE FRAHM.  HELICOPTER HAD A 4 PER VIBRATION AND COULD NOT BE ELIMINATED.  REPLACED FRAHM ASSY AND BALANCED HELICOPTER ROTOR SYSTEM TO ACCEPTABLE LEVELS.

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