AD 2013-03-03
Effective 03/15/2013 · Published 02/08/2013
Airworthiness Directives; MD Helicopters, Inc., Helicopters
Summary
We are adopting a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model 500N, 600N and MD900 helicopters to require determining the cure date for each NOTAR fan blade tension- torsion strap (T-T strap), establishing a calendar-time retirement life for certain T-T straps, reducing the retirement life of certain T-T straps, marking each T-T strap with the expiration date, creating a component record c…