What was found
SIG EVENT - PILOT REPORTED THAT ON FINAL WITH TORQUE SET AT 300, INCREASED TORQUE TO 1000, LEFT ENGINE BEGAN TO CYCLE IN AND OUT OF FEATHER. MAINTENANCE PERFORMED TESTS OF THE AUTOFEATHER SYSTEM AT ALL TORQUE SETTINGS, IAW MM 61-21-00, AUTOFEATHER SYSTEM OPERATES NORMALLY, OK FOR CONTINUED SERVICE.