47-10-08 LOCKHEED: (Was Mandatory Note 9 of AD-763-3.) Applies Only to Model 49 Serial Numbers 1975 to 1978, Inclusive; 1980; and 2021 to 2059, Inclusive.
Compliance required prior to August 9, 1946.
Rework the elevator booster shifter horn assembly by reducing the width of the teeth on 278488 gear. 0.120 inch should be removed from each end of all the teeth.
(LAC Service Bulletin 049/SB-19 covers this same subject.)