In helicopter takeoff sequencing, when can a second helicopter be cleared for takeoff?

• A. After the first helicopter has completed its climbout to altitude
• B. After the first helicopter has left the takeoff area
• C. After the first helicopter has landed
• D. After the second helicopter has started its takeoff

Answer: (C)

In helicopter takeoff sequencing, safety comes from keeping the takeoff/landing area clear and ensuring one aircraft finishes its ground phase before the next starts. The second helicopter is cleared to take off only after the first has landed because that guarantees the area is free of rotor wash hazards and the first helicopter is out of the departure/landing path. With the first on the ground, there’s no risk of the second’s rotor wash disturbing a landing sequence or of two helicopters operating in conflicting paths.

If you tried to clear the second after climbout, the first might still be in the air in or near the takeoff/arrival corridor, increasing collision and rotor wash risk. Clearing after the first has left the takeoff area but before it has landed could still leave the takeoff zone compromised by the first helicopter’s ongoing flight path. Waiting until the second has started its takeoff would defeat safe sequencing altogether. Clearing after the first has landed ensures a clear, safe handoff.