74-12-04 R2 GRUMMAN AMERICAN AVIATION CORPORATION: Amendment 39- 1851 Applies to Grumman G-1159 airplanes certificated in all categories.
Compliance required within the next 100 hours' time in service after the effective date of this AD, unless already accomplished.
To prevent operation of the pitch trim at a greater rate when an additional signal in the opposite direction is selected, modify the Automatic Flight Control System junction box in accordance with Grumman American Aviation Corporation, Aircraft Service Change 143, or an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region.
This amendment becomes effective May 30, 1974.