AD 82-06-07

82-06-07 BELL HELICOPTER TEXTRON (BHT): Amendment 39-4340. Applies to Model 214B series helicopters, Serial Numbers 28001 through 28060, certificated in all categories (Airworthiness Docket No. 81-ASW-58).

a. To prevent fatigue failure of tail rotor yokes, Part Numbers 214-010-702-001, - 105, and -107, accomplish the following:

(1) Inspect the tail rotor yoke by magnetic particle inspection in accordance with Bell Helicopter Textron Alert Service Bulletin No. 214-81-18 dated September 18, 1981, or FAA approved equivalent, at the next flapping/pitch change bearing replacement following the effective date of this AD or, in any case not later than July 12, 1982. (The inspection is not required if the applicable Bell Helicopter Textron Alert Service Bulletin has previously been complied with.)

(2) If any inclusions are detected, the yoke shall be rejected and replaced with a like serviceable part.

b. Any equivalent method of compliance with this AD must be approved by the Chief, Aircraft Certification Division, Southwest Region, Federal Aviation Administration.

c. In accordance with FAR 21.197, flight is permitted to a base where the inspection required by this AD may be accomplished.

This amendment becomes effective April 12, 1982.