What is the recommended action to recover from dynamic rollover on level ground?

• A. Increase throttle to maintain rotor RPM
• B. Apply cyclic toward the roll and hold
• C. Use aggressive rolling to exit
• D. Perform a smooth moderate collective reduction

Answer: (D)

Dynamic rollover is a situation where a slight bank causes a rolling motion that can feed on itself, especially when one skid or wheel remains in contact with the ground. On level ground, the most reliable way to interrupt that rolling tendency is to reduce lift smoothly so the rotor isn’t still driving the roll, and the weight of the helicopter can settle the aircraft back toward a stable attitude.

A smooth moderate reduction of collective lowers overall rotor thrust just enough to unload the lifting side without letting the rotor rpm decay too much. This dampens the roll momentum and helps the helicopter come to rest without the abrupt control inputs that can drive the roll further. Avoid aggressive cyclic actions or a rapid change in lift: pushing cyclic toward the roll or applying explosive motions can worsen the bank, and increasing throttle to maintain rotor rpm can sustain or aggravate the roll. Once the attitude stabilizes near level, you can re-establish control more calmly.