AD on Auto Flight System for Eurocopter EC225 Helicopters

The FAA is adopting a new airworthiness directive 2014-04-12 (AD) for certain Airbus Helicopters Model EC225LP helicopters. This AD adds a new operating limitation that requires increasing the minimum density altitude flight limitation for helicopters without certain Eurocopter modifications installed. This AD is prompted by a report that flights below a certain density altitude create oscillations in the main rotor which can transfer dynamic loads to the structure, the main gearbox (MGB), and the main servo-control inputs, which could result in subsequent loss of control of the helicopter. DATES: This AD is effective April 7, 2014. pdf icon 2014-04-12.pdf

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