What procedure should be followed if the landing gear warning light fails?

When the landing gear warning light fails, the appropriate course of action is to refer to the emergency checklist and prepare for manual gear deployment. This is essential because the warning light serves as an important visual indicator of the landing gear's status; if it is not functioning, the pilot cannot be certain whether the gear is deployed or not.

By following the emergency checklist, the pilot can ensure that all procedures for safely confirming gear position and deploying it manually, if necessary, are executed correctly. It prioritizes safety by preparing the pilot for a situation that might arise from the failure of the light, ensuring that all potential risks are addressed. Preparing for manual deployment is a prudent step that allows the pilot to maintain control and respond to any unexpected scenarios during the landing process.

Other options might not address the safety issues involved with a gear warning light failure. Notifying the control tower may not be necessary unless a landing is imminent and there's a clear emergency to communicate. Continuing landings without concern is unsafe since there’s no indication of the landing gear's position, which could lead to catastrophic results. Powering down systems and restarting does not directly address the problem at hand and may exacerbate the situation by introducing additional failure points.