Incident Overview
A training flight ended in a hard landing and rollover when a helicopter struck a sod area during a steep approach. The flight instructor (CFI) reported that he was questioning the rated pilot about the approach while the helicopter was at approximately 300 feet and 35 knots airspeed.
Sequence of Events
According to the CFI, he asked the pilot receiving instruction whether he could roll the throttle off. The rated pilot replied, "roll the throttle off," and immediately reduced the throttle to idle. The CFI then observed an instantaneous decrease in rotor rpm. Taking control, the CFI found the helicopter in a vertical rate of descent. He lowered the collective pitch in an attempt to restore rotor rpm, but did not apply forward cyclic to increase airspeed because of the low altitude.
The helicopter subsequently impacted the sod area hard and rolled over onto its left side.
Context
The incident occurred during a training exercise where the CFI was evaluating the rated pilot's performance. The helicopter was executing a steep approach at the time. No information about weather, ATC communications, or other conditions was provided.
Damage and Injuries
The helicopter sustained damage from the hard impact and rollover. The source does not specify injuries to occupants or the extent of damage to the aircraft.