Airworthiness Directive · Amendment 39-21155 · Main rotor
Bell Textron Inc. (Type Certificate Previously Held by Bell Helicopter Textron Inc.) Helicopters
This AD applies to Bell Textron Inc. (Bell) Model 214ST helicopters, certificated in any category, with a spindle to yoke bolt (bolt) part number (P/N) 214-010-262-103 and serial number (S/N) BH179163, BH179164, BH179169, BH179170, BH179171, BH179175, BH179176, BH179178, BH224783, BH224751, BH224756, BH224764, BH224765, BH383851, BH383853, BH383855, BH383856, BH383857, BH383858, BH383860, BH383861, BH383862, BH383864, BH383865, BH383868, BH383872, BH383873, BH383878, or BH383879 installed.
The FAA is adopting a new airworthiness directive (AD) for Bell Textron Inc. (Bell) Model 214ST helicopters. This AD was prompted by the discovery of bolts with nonconforming external thread root radii. This AD requires removing the affected bolts from service and prohibits installing an affected bolt on any helicopter. The FAA is issuing this AD to address the unsafe condition on these products.
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
(1) Within 25 hours time-in-service, remove from service each bolt listed in paragraph (a) of this AD.
(2) After the effective date of this AD, do not install on any helicopter a bolt with a P/N and S/N listed in paragraph (a) of this AD.
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.
