What maintenance action is taken when tires show excessive wear?

When tires show excessive wear, the appropriate maintenance action is to replace the tires. Excessive wear typically indicates that the tires have been degraded beyond safe operational limits, which can compromise the performance, handling, and safety of the aircraft.

Tires are subject to significant stress from the weight of the aircraft and the forces encountered during takeoff, landing, and taxiing. When they begin to show signs of excessive wear – such as tread wear indicators showing through, uneven wear patterns, or cracks – it is an indication that they can no longer provide adequate grip or structural integrity.

Replacing the tires ensures the aircraft maintains optimal performance and safety standards, as worn-out tires can lead to longer stopping distances, reduced traction, and a higher risk of tire failure during operational conditions. In terms of maintenance protocols, addressing tire wear through replacement is considered a critical regular maintenance action to prevent further issues and ensure safe operation.

The other options listed, such as repairing the tire tread or rebalancing the wheels, may be relevant in different contexts but do not address the fundamental issue of excessive wear that compromises safety. Inflating the tires to the recommended pressure is important for tire maintenance, but it does not rectify or mitigate the risks associated with excessive wear.