NEW PORT RICHEY, FL, USA
N162WM
Rotorway EXECUTIVE 162F
While returning to the ramp, flying about 4-5 feet above ground level, the student pilot noticed that the main rotor rpm was decreasing. He lowered the collective and added power but the rotor rpm was not changed before impact with the ground - first on the rear portion of the skids. The helicopter rolled onto its side and both occupants exited. The pilot further stated that there was no engine failure or malfunction, and contributing to the accident was the fact that he had only obtained 2-3 hours rest each of the past 4 nights.
On June 5, 1998, about 1445 eastern daylight time, a homebuilt Rotorway International Executive 162F helicopter, N162WM, registered to a private individual, rolled over after touchdown at the Hidden Lake Airport, New Port Richey, Florida. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 91 instructional flight. The helicopter was substantially damaged and the student pilot and one passenger were not injured. The flight originated on the airport about 20 minutes earlier. The pilot stated that the purpose of the flight was to practice hovering with a passenger on board in preparation for an upcoming checkride. He had been practicing hovering for about 20 minutes when, while flying about 4-5 feet agl at 4-5 mph over a creek, he noted that the main rotor rpm decayed. He lowered collective and attempted to accelerate, but the skids contacted the ground and the helicopter rolled onto its right side. He further stated that there was no engine or airframe malfunction and contributing to the accident was the fact that he had only obtained 2-3 hours rest for each of the past 4 nights.
The pilot's improper use of the collective. Contributing to the accident was pilot fatigue due to lack of sleep.
Source: NTSB Aviation Accident Database
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