# SDR 20001215SH029

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 7, 2000
- Submitted: December 15, 2000
- Operation: General aviation
- Aircraft: [N901CF](https://openairdocs.org/aircraft/N901CF), registered now
- Make and model: Doug MD 900
- Registry model: [Doug MD 900](https://openairdocs.org/model/mcdonnell-douglas-helicopter-md-900) (OpenAirDocs)
- Aircraft serial: 90000012
- Aircraft time: 4,245 hours
- System (JASC): [6710 · Main Rotor Control](https://openairdocs.org/jasc/6710)
- Part: Friction Ring
- Part number: 900C3010002105
- Part serial: 0056940024
- Condition: Rough
- Location: Collective
- Part time: 129 hours
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20001215SH029

## Discrepancy

COLLECTIVE FRICTION UNIT ROUGH AND RATCHETY.  REPLACED WITH NEW UNIT, CORRECTED PROBLEM.  (X)

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