Helio HST-550

Helio HST-550 Non-Fatal Mobile, AL Sept. 29, 1990

Posted by on Sep 29, 1990 in 1990, Helio HST-550, Non-Fatal, Non-Fatal Single-Engine, Preflight | 0 comments

The airplane collided with trees and power lines during takeoff from a 2000 foot long open area with 10 parachutists aboard. The pilot said he experienced an unsolicited rollback in engine power prior to the collision. Reportedly, some power was regained. However, not in time to avoid the collision. But, the jump club chairman reported that no change in the engine’s operation was observed throughout the mishap. Witnesses at the takeoff area reported that the winds were 12 knots out of the northeast, which would have given the flight a quartering tailwind component for the takeoff. According to the flight manual, the maximum demonstrated crosswind is 12 knots. The examination of the airplane failed to indicate any system malfunction or failure. Read the NTSB...

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Helio HST-550 Fatal (1) Perris, CA June 30, 1988

Posted by on Jun 30, 1988 in 1, 1988, Fatal, Fatal Single-Engine, Helio HST-550, Loss of Aircraft Control | 0 comments

After dropping skydivers the pilot entered a descent to return to the airport for another load of jumpers. He was receiving radar advisories during the drop from a tracon controller. As the aircraft descended below 4,000 feet msl the controller terminated the radar advisory service. Immediately after the controller discontinued the service he asked the pilot to check for a stuck microphone switch. The aircraft continued its descent and collided with a camping trailer and building under construction in an extreme nose low attitude. The elevator trim was found in the full nose down position. No other malfunctions were found. Read the NTSB...

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