• R-2 (1954) M76AM Propellers
• R-3 (1956) M76AM Propellers
• R-8-1 (1961) M74DM Propellers "A" or "K" S/N Prefixes
• R-11 (1966) M76EMM Propellers On PA-28-180 S/N 28-671 to 28-2336
• R-12A (1967) All Propellers with water-soluble decals
• R-13 (1969) M76EMM/76EM8 Series Propellers on hollow crank O-360 engines
• R-14A (1970--revised in 1995) Continuation of #R-13
• R-15A (1989) All Propellers--Corrosion Inspection
• R-16 (1988) 69CK Series Propellers--Improved Pitch Distribution
• R-17 (1999) Increase TBO of Sensenich Fixed Pitch Aluminum Propellers from 1000 to 2000 hours

Airworthiness Directives

• 54-05-02 (1954) M76AM Propellers
• 60-11-08 (1960) M74DM Propellers "A" or "K" S/N Prefixes
• 66-23-02 (1966) All Propellers with water-soluble decals
• 69-09-03 R3 (1969--revised in 1996) M76EMM/76EM8 Series Propellers on hollow crank O-360 engines