48-11-04 REPUBLIC: Applies to Model RC-3 Aircraft.
Compliance required by April 15, 1948.
To provide security for the hydraulic pump handle attachment, the four self-locking nuts now used should be replaced by three AN 310-4 and one AN 310-5 castle nuts and cotters. The fulcrum bolt is already drilled for a cotter. The present clevis bolts may be drilled for the cotter or may be replaced by two AN 24-17 and one AN 24-13 clevis bolts.
(Republic Service Bulletin No. 22 covers this same subject.)