Summary
We propose to adopt a new airworthiness directive (AD) for various Airbus Helicopters Deutschland GmbH (Airbus Helicopters) Model MBB-BK117 and Model BO-105 helicopters. This proposed AD would require removing the swashplate bellows (bellows) and repetitively inspecting the swashplate assembly. This proposed AD is prompted by reports of loose and missing clamps installed on bellows. The proposed actions are intended to detect and prevent an unsafe condition on these products.