What is the correct operating sequence for the main gear and doors?

The correct operating sequence for the main gear and doors on the Dassault Falcon 7X involves the main doors opening first, followed by the landing gear extending or retracting as needed, and finally, the main doors closing. This sequence is critical for ensuring safe and efficient operations during takeoff and landing phases.

When the main doors open, this allows for the landing gear to operate without obstruction. For example, when preparing for takeoff, opening the doors provides access for personnel and allows for pre-flight checks. Upon takeoff or landing, the landing gear must be deployed or retracted in conjunction with the door mechanism to maintain aerodynamic integrity and to ensure that the gear is fully housed or deployed correctly within the aircraft structure.

Closing the doors after the landing gear has been handled ensures that the aircraft is streamlined and secure for flight. This operating procedure is in line with standard aviation protocols, promoting safety and efficiency during ground handling and flight operations.

In contrast, the other options may suggest improper sequences, such as attempting to retract the landing gear before ensuring the doors are properly managed, which could lead to operational complications or safety hazards.