When should the landing gear switches, lights, and warning devices be checked for proper operation?

The appropriate time to check the landing gear switches, lights, and warning devices is during the landing gear retraction check. This phase is crucial because it ensures that all associated systems are functioning correctly as the landing gear transitions from the extended to the retracted position.

By conducting this check during retraction, the pilot can confirm that the landing gear indicator lights and warning devices accurately reflect the status of the landing gear. If there are any malfunctions, the retract check provides an immediate opportunity to address potential issues before the aircraft reaches cruising altitude.

Other times for checking the landing gear indicators may include pre-flight checks or before flight, but checking during the landing gear retraction phase is particularly significant since it directly relates to the operation of the gears as part of the takeoff and initial climb procedures. Thus, conducting this check at this specific moment enhances safety by providing a verification of the landing gear's functionality when it is most critical.