58-08-04 HAMILTON STANDARD: Applies to all Models 23260, 24260, 34D50, 34D51, 34E60, 43E60, and 43H60 Propellers Incorporating Pitch Locks.
Compliance required at first propeller overhaul after May 15, 1958, if not already accomplished.
Two cases have been reported wherein the dome cap of propellers incorporating a pitch lock become partially disengaged in flight, resulting in complete loss of propeller control.
To preclude additional failures of this nature, reduce to 0.013 or less the clearance between the dome cap and stop lever sleeve bushing by conducting the necessary inspection rework, and/or replacement.
(Hamilton Standard Service Bulletin No. 496D covers this same subject.)
This supersedes AD 58-02-02.