What maintenance action is required for the helicopter's tail rotor?

Regular inspections and lubrication of the helicopter's tail rotor are essential maintenance actions that ensure the tail rotor functions properly and maintains its reliability. The tail rotor is critical for controlling the helicopter's yaw and stability during flight, and any wear or degradation can significantly impact performance.

Routine inspections allow maintenance personnel to identify any signs of damage, wear, or abnormal functioning that could lead to failures. Lubrication prevents excessive friction between moving parts, reduces wear, and enhances the lifespan of the rotor components. This proactive approach is necessary to ensure safety and efficient operation.

In contrast, complete engine overhaul, replacing the entire rotor assembly, and calibration of flight instruments do not specifically pertain to the routine maintenance of the tail rotor. These options reflect more extensive or unrelated maintenance tasks rather than the ongoing, essential upkeep focused on the tail rotor.