COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Propellers - Fixed Pitch
AD/PFP/15 Sensenich Propeller - Engine Combination 6/89
All Sensenich model M76AM-2 or 76AM6-2 series propellers installed on Lycoming O-290-D2 engines.
Remove from service and metal stamp the word "UNSERVICEABLE" on the propeller hub.
M74DM or 74DM6 propellers may be installed as replacements.
Within 25 hours time in service after 25 April 1989 or by 31 May 1989 which ever occurs first.
Due to recurring tip failures, Sensenich issued SB No 3, dated November 1956, requiring M76AM-2 or 76AM6-2 propellers to be retired from service. This was advised via AD/PA-20/6 but due to a recurrence of this combination on other aircraft types it has now been extended to all installations involving this engine and propeller combination.