Helicopter rollover during hover practice

Casualties unknown • Van Nuys, CA, US

A helicopter rolled over after a rotor blade struck an asphalt ramp during hovering maneuvers, resulting in no injuries to the two crew members.

What happened

A flight crew was engaged in hovering practice from a movable helipad for approximately 30 minutes prior to the accident. During this training period, the first pilot completed five vertical lift-offs and landings.

Following the final landing, a second pilot boarded the helicopter and took a seat in the left front position. As the second pilot initiated a lift-off into a hover, the aircraft began to drift to the right, moving off the helipad. Although the first pilot reported that both pilots applied full left cyclic input, the second pilot was unable to use the proper flight controls to arrest the drift. Consequently, the main rotor blade made contact with the asphalt ramp surface, causing the helicopter to roll over. Both pilots involved had only accumulated 2 flight hours in this specific aircraft make and model. There were no injuries reported.

The investigation

An examination of the helicopter was conducted, which revealed no evidence of any failures within the flight control system.

Probable cause

The pilot's failure to maintain proper control of the aircraft during a hover, combined with a lack of adequate supervision by the first pilot, led to the helicopter drifting off the helipad and striking the ramp surface.

Frequently asked questions

What happened in the 1992-07-08 Hiller FH-1100 accident near Van Nuys, CA?

A helicopter rolled over after a rotor blade struck an asphalt ramp during hovering maneuvers, resulting in no injuries to the two crew members.

What aircraft was involved and where did it happen?

The accident on 1992-07-08 involved a Hiller FH-1100, registration N5061F, operated by Pacific Shore Aviation, at Van Nuys, CA.

What was the probable cause of the accident?

The pilot's failure to maintain proper control of the aircraft during a hover, combined with a lack of adequate supervision by the first pilot, led to the helicopter drifting off the helipad and striking the ramp surface.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X15187. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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