As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT THE LEFT PROPELLER SEEMS LIKE IT TRIES TO AUTOFEATHER FURING FINAL. MAINTENANCE R & R THE BETA ARM LEVER IAW BMM 61-20-00 STEP 2 PN:3054890-01, RR BETA ARM BRACKET BY REMOVING THE 2 NUTS & INSTALLED THE NEW ONE IN REVERSE ORDER PN:3111379-02 NSN REF TC 3.6.0. ITEMS 12-15.