48-07-02 DOUGLAS: Applies to DC-6 Serial Numbers 42854 Through 42896; 43000 Through 43024; 43035 through 43064; and 43105 Through 43110. \n\n\tTo be accomplished not later than the first engine change after March 1, 1948, but in any event not later than June 1, 1948. \n\n\tTo prevent failure in the engine supercharger control actuator when shifting from low to high blower and vice versa, it is necessary to provide overtravel in the engine supercharger control linkage by installing a new Geneva-Loc supercharger actuator lever, a new Bendix link-supercharger actuating link and a new four-hole mounting support bracket. \n\n\t(Douglas Service Bulletin DC-6 No. 127 covers this same subject.)