71-12-03 GRUMMAN AIRCRAFT: Amdt. 39-1224. Applies to Model G21A aircraft certificated in all categories.
Within the next 25 flight hours after the effective date of this AD, unless already accomplished, visually inspect, replace or repair P/N 7190Y-OA-1408 (flexible drive shaft, elevator tab control) in accordance with the procedure of Grumman Customer Bulletin G21A No. 71-1 dated 3 March 1971 or with equivalent method.
Equivalent methods or parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region.
This amendment is effective June 10, 1971.