What action should a mechanic take while taxiing on a runway if the tower directs a flashing red light at him?

• A. Stop immediately and shut down the engine.
• B. Proceed to a taxiway as if nothing happened.
• C. Taxi the aircraft clear of the runway in use.
• D. Return to the starting point for instructions.

Answer: (C)

A flashing red signal from the tower directed at you on the runway means you must clear the active runway immediately. The correct action is to taxi the aircraft off the runway in use to a safe area, such as a parallel taxiway or a designated exit, and then hold and await further instructions. This signal indicates an immediate safety concern or that another aircraft has priority, so continuing down the runway or returning to the starting point would increase the risk of a collision. Shutting down the engine isn’t required unless specifically instructed, and proceeding as if nothing happened or returning to the starting point isn’t appropriate for this directive.