Airworthiness Directive · Amendment 39-9149 · MD Helicopters, Inc. Helicopters
MD Helicopters, Inc. Helicopters
Superseded. A later AD replaced this one: AD 98-15-26. Comply with the one in force.
This AD applies to MD Helicopters, Inc. 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment supersedes an existing airworthiness directive (AD), applicable to McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369 and OH-6A series helicopters with certain main rotor (M/R) blade assemblies or certain M/R hub lead-lag assemblies installed, that currently requires repetitive inspections and checks for cracks. This amendment requires the same inspections as the superseded AD, but would eliminate pilot checks, expand the areas of inspection, and require the application of slippage marks on each M/R blade root fitting lug and related bushings. This amendment is prompted by additional reports of cracks in the M/R blade root fittings, lugs, and adjacent blade skin, and movement of the root fitting bushings. The actions specified by this AD are intended to prevent failure of a M/R blade assembly or a M/R hub lead-lag link assembly, loss of a M/R blade, and subsequent loss of control of the helicopter.
