69-11-02 BELL: Amdt. 39-769. Applies to Bell Model 206A Helicopters, Serial Numbers 4 through 408, having the cyclic stick balance spring installed.
Compliance required prior to the next flight after the effective date of this AD, unless already accomplished.
To prevent a possible restriction of the cyclic control system, accomplish the following one time inspection and readjustment, if necessary:
A. Remove the co-pilot's seat, P/N 206-031-141, to expose the cyclic control left pivot and yoke.
B. Inspect and readjust, if necessary, the balance spring clip, P/N 206-001-391, for proper mounting on the yoke, left hand, P/N 206-001-322, in accordance with paragraph (C) below.
C. The clip, P/N 206-001-391, must be mounted on the left hand outboard side of the clevis of the yoke, P/N 206-001-322, with the .38 by .16 inch tang of the clip against the top surface of the yoke pointing inboard.
(Figure 1 in Bell Helicopter Company Service Letter No. 206A-104, Revision B, dated January 17, 1969, and Bell Helicopter Company information letter dated May 16, 1969, pertain to this subject).
This amendment becomes effective to all known owners of Bell Model 206A Helicopters upon receipt of this AD and to all others on May 28, 1969.