47-02-07 CULVER: (Was Service Note 1 of AD-778-2.) Applies to Models V and V2 Aircraft.
Inspection required after each 100 hours of operation.
Inspect landing gear retraction system to determine that adjustments are as follows:
(1) With the landing gear extended and no load on the wheels, the push-pull rod adjustments should be such that the center joint of the retraction links attached to each shock strut will withstand a minimum upward pressure of 25 pounds without movement.
(2) The length of the push-pull rods in the wing should be so adjusted that the retraction links attached to both main gear struts are under equal pressure.
(3) The down limit switch should be adjusted to cut off when the gap between the down stop and the horn on the actuating mechanism is 0.015 inch to 0.020 inch. Maintenance of these adjustments is necessary to prevent damage to the retraction system.
(Culver Service Memorandum No. 12 dated November 27, 1946, covers this same subject.)