What could be a consequence of gear control lever failure?

The consequence of gear control lever failure primarily results in the landing gear not being able to retract. This is critical because the landing gear is not just an operational component of the aircraft; it directly affects flight safety and performance. If the gear cannot retract, the aircraft will need to maintain a configuration that could create increased drag, thus affecting fuel efficiency and speed. This could lead to difficulties in achieving and maintaining optimal flight conditions. Ensuring the landing gear operates correctly is vital for both safety during takeoff and landing as well as for overall operational efficiency.

While other options may appear plausible, they do not directly relate to the function and importance of the gear control lever. For instance, an immediate landing requirement may occur due to various factors, but it is not a direct result of gear control failure. Similarly, running out of fuel or a cockpit information system shutdown involves different systems entirely and are not outcomes of a failure in the gear control lever.