How many jack screws are needed for flap extension and retraction during normal operations?

In the Dassault Falcon 2000LXS, the flap system utilizes jack screws for extension and retraction, providing the mechanical capability to move the flaps effectively. The correct answer reflects the requirement of three jack screws to ensure the flaps operate correctly during normal flight operations.

Having three jack screws allows for redundancy and improved reliability in the flap system. In aviation applications, using multiple mechanisms for essential functions like flap movement is critical for safety and performance, particularly during critical phases of flight such as takeoff and landing. The positioning and operation of these three jack screws are designed to maintain an even extension and retraction of the flaps, helping to distribute forces evenly and reducing the risk of misalignment or failure.

The other options do not meet the safety and operational requirements for the flap system in the Falcon 2000LXS. Using fewer jack screws would potentially diminish the system's reliability and increase the likelihood of malfunctions, compromising safety during crucial flight operations.