6/5/2023

Requires determining if an affected tail rotor drive shaft (TRDS) is installed; repetitively inspecting the bond line for damage; repetitively performing a proof load test of the TRDS assembly; and, depending on the results of the inspections or the proof load tests, removing an affected TRDS from service and replacing it with a serviceable TRDS. This AD also prohibits installing a TRDS unless it meets certain requirements. Prompted by a loss of tail rotor drive due to a failure of an adhesively bonded joint between an adapter and a tube on one of the segmented TRDS assemblies.