Airworthiness Directive · Amendment 39-9561 · Bell Helicopter Textron, Inc., Model 214ST Helicopters
Bell Helicopter Textron, Inc., Model 214ST Helicopters
Model 214ST helicopters, serial number (S/N) 28101 through 28132, with a tailboom assembly, part number (P/N) 214-031-003-111 or 214-031-003-277 and with an emergency float kit, P/N 214-706-120, installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to Bell Helicopter Textron, Inc. (BHTI) Model 214ST helicopters with certain tailboom assemblies and a certain emergency float kit installed, that requires initial and repetitive inspections of the tailboom for cracks until modifications of the tailboom are accomplished. This amendment is prompted by several reports of cracks in the lower aft skin of the tailboom assembly. The actions specified by this AD are intended to prevent cracks in the tailboom assembly, which could result in structural failure of the tailboom and subsequent loss of control of the helicopter.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
