47-32-09 BELL: (Was Mandatory Note 9 of AD-1H-1.) Applies to Models 47B and 47B3 Helicopters.
Compliance required not later than next 25-hour inspection after September 15, 1947.
Diagonal external brace, 47-267-036 or 42-267-037, as applicable, should be installed on the horizontal stabilizer, of all Model 47B Series helicopters. These braces will provide external support to the stabilizers.
(Bell Service Bulletin 47C21 dated June 11, 1947, covers this same subject.)