This standard is supplementary to AS 41 'Propeller Shaft Ends, Single Rotation', and AS 91 'Propeller Shaft Ends, Dual Rotation (Propeller Supplied Bearing)'. It is applicable to all engines that incorporate two-speed propeller reduction gears.
This Aerospace Information Report (AIR) is written as an aid for locating and identifying various fitting designs and configurations that are designated as standard parts.
The specification covers the requirements for locked-in studs. The method of locking in the stud is by means of a serrated collar and an accessory lockring with matching serrations installed within the parent material to prevent rotation.