POMPANO BEACH, FL, USA
N333PH
Robinson R22 BETA
During power recovery from an autorotation landing the dual student allowed the rotor speed to slow. The helicopter touched down on the aft part of the skids and then bounced forward where the left skid contacted the turf. As the helicopter started to roll to the left the student increased collective as the flight instructor was trying to regain control by decreasing collective. The helicopter rolled over to the left and came to rest.
On October 17, 1997, about 0946 eastern daylight time, a Robinson R22 Beta, N333PH, registered to Pompano Helicopters, Inc., rolled over during landing at Pompano Beach Airpark, Pompano Beach, Florida, while on a Title 14 CFR Part 91 instructional flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The helicopter received substantial damage and the commercial-rated flight instructor and dual student were not injured. The flight originated from Pompano Beach, the same day, about 0930. The flight instructor stated they were performing an autorotation landing. The student was flying the helicopter. The student flared for landing and as the helicopter leveled it was still moving forward slowly. The student initiated a power recovery at which time the low rotor rpm horn sounded and the helicopter began to settle. The back of the skids hit the turf and they bounced forward. The left skid hit the turf and the helicopter began to lift up. The student continued to raise up on the collective as the instructor was trying to push down on the collective. The instructor was not able to establish a proper recovery and the helicopter turned over to the left as a result of dynamic roll over.
The improper use of collective control by the dual student which prevented the flight instructor from stopping an uncontrolled roll to the left.
Source: NTSB Aviation Accident Database
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