47-22-03 PIPER: (Was Mandatory Note 4 of AD-780-3.) Applies Only to PA-12 Aircraft Serial Numbers 12-1 and Up to 12-249 Except Serial Numbers 12-221, 12-236, 12-239 and 12-244.
Compliance required prior to August 1, 1947.
Reinforce the upper end of the tie strap on the landing gear with a 0.125 x 1 1/2 x 4 1/2, 4130 steel plate. Bend and trim to fit and install over end of strap by edge welding.
(Piper Service Bulletin No. 93 dated August 8, 1946, covers this same subject.)