Summary
We propose to adopt a new airworthiness directive (AD) for Bell Model 206A, 206B, 206L, 206L-1, 206L-3, 206L-4, 222, 222B, 222U, 230, 407, 427, and 430 helicopters. This proposed AD would require inspecting each bearing to determine if it has been properly staked and replacing the bearing or assembly if it has not been staked properly. This proposed AD is prompted by bearings not being staked as required and migrating out of their proper position, which may limit the functionality of the affected part. The proposed actions are intended to prevent failure of a bearing and the assembly in which it is installed and subsequent loss of control of the helicopter.