47-32-12 BELL: (Was Mandatory Note 12 of AD-1H-1.) Applies to Models 47B and 47B3 Helicopters.
Compliance required not later than the next 25-hour inspection after September 15, 1947.
In order to provide more strength in the lateral cycle control system, the disc links should be replaced with forward and aft links, 47-725-047.
(Bell Service Bulletin 47C35 dated June 18, 1947, also covers this same subject.)