Summary
The FAA proposes to adopt a new airworthiness directive (AD) for Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters with certain main rotor blades MRB installed. This proposed AD was prompted by a report of an in-flight loss of a main rotor blade (MRB) tip cap. This proposed AD would require inspecting the MRB tip cap for disbonding. The FAA is proposing this AD to address the unsafe condition on these products.