# SDR 96ZZZX4328

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 12, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N1660W
- Make and model: Beech 200BEECH
- Aircraft serial: BB390
- Propeller: Hartzl HCB3TN3
- System (JASC): [6111 · Propeller Blade Section](https://openairdocs.org/jasc/6111)
- Part: Blade
- Condition: Tip Flutter
- Location: Propeller
- 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/96ZZZX4328

## Discrepancy

BOTH PROPELLERS GO INTO TIP FLUTTER AT ENGINE POWER SETTINGS AT AND ABOVE 1,800 FEET/POUNDS OF TORQUE.  HIGH FREQUENCY VIBRATION CAN BE FELT THROUGHOUT THE ENTIRE AIRCRAFT.  BLADE TIPS TOO THIN AT TIPS.  MANUFACTURER HAS NO STANDARDS FOR MINIMUM THICKNESS AT THIS BLADE STATION.

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