# SDR CA050816007

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2005
- Submitted: September 1, 2005
- Operation: General aviation
- Make and model: Bell 206L-1
- Registry model: [Bell 206L-1](https://openairdocs.org/model/bell-helicopter-textron-206l-1) (OpenAirDocs)
- Aircraft time: 12,292 hours
- Engine: Allsn 250C30P
- System (JASC): [6340 · Rotor Drive Indicating System](https://openairdocs.org/jasc/6340)
- Part: Drive Shaft
- Part number: 206076373001
- Part serial: 3957
- Condition: Worn
- Location: Main Rotor Tach
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA050816007

## Discrepancy

(CAN) WHILE A/C IN CRUSE FLIGHT LOW ROTOR HORN CAME ON.  ROTOR RPM INDICATED (0).   WHEN PILOT LOWERED COLLECTIVE, HE HAD NO HYDRAULIC PRESSURE.  A/C LANDED AND MAIN ROTOR CONTACTED TAILBOOM.  ON REMOVAL ROTOR TACH GEN DRIVE SHAFT INTERNAL SPLINES WERE FOUND TO BE WORN TO THE POINT OF DISENGAGEMENT.

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