Airworthiness Directive · Amendment 39-19354 · Emergency flotation section
Bell Helicopter Textron Inc., Helicopters
This AD applies to Bell Helicopter Textron Inc. Model 212, Model 412, and Model 412EP helicopters, certificated in any category, with an emergency flotation system (EFS) tube assembly part number (P/N) 412-073-820-101 with a date of manufacture before July 28, 2016, or an unknown date of manufacture installed.
We are adopting a new airworthiness directive (AD) for Bell Helicopter Textron Inc. (Bell) Model 212, Model 412, and Model 412EP helicopters. This AD requires replacing the emergency flotation system (EFS) tube assembly. This AD was prompted by a report of an EFS tube assembly failure. The actions of this AD are intended to address an 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 300 hours time-in-service:
(i) Remove the EFS tube assembly from service.
(ii) Lubricate the shoulder of the sleeves, threads, and seat of each mating fitting with anti-seize compound.
(iii) Install an EFS tube assembly not listed in paragraph (a) of this AD.
(2) After the effective date of this AD, do not install an EFS tube assembly listed in paragraph (a) of this AD on any 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.
