59-15-02 COLONIAL: Applies to All Models C-1 and C-2 Aircraft.
Compliance required as indicated.
An incident has recently been experienced where the rivets fastening the aluminum throttle control handle to the steel bell crank have loosened and sheared. Accordingly these two rivets should be inspected immediately and replaced with the following hardware if any looseness is apparent: Two each AN 23-8 clevis bolt, AN 960D10L washer, and AN 364-1032 self-locking thin nut. In any case the rivets should be replaced with the foregoing parts not later than the next periodic inspection or December 1, 1959, whichever comes first.
In order to accomplish this modification it is necessary to remove the throttle from its supporting bracket to change the rivets to bolts. In addition the slot in the bracket should be widened to allow 1/8-inch minimum clearance between the end of the bolt and the edge of the bracket.
(Colonial Service Bulletin No. 14 revision A covers the samesubject.)