What was found
SUSPECTED AUTOFEATHER EVENT, UPON APPROACH, PILOTS REPORTED THAT RT AUTOFEATHER ACTUATED (AS IT NORMALLY DOES DURING TESTING) ON APPROACH AFTER A MINOR POWER INCREASE. MAINT REMOVED AND REPLACED THE OVERSPEED GOVERNOR IAW MM 61-20. OPS CHECK WAS GOOD, HOWEVER, IT DID NOT FIX THE DISCREPANCY. MAINT REMOVED AND REPLACED THE PRESSURE SWITCH PN 50-389121-4 IAW MM 61-21. SWITCH OPS CHECK GOOD, BUT DID NOT FIX THE DISCREPANCY. MX FOUND LOOSE SOCKET ON PCB A123 CONNECTOR. SECURED SOCKET, SYSTEM OPERATIONALLY CHECKED GOOD IAW MM 61-20. OPS CHECK FLIGHT WAS PERFORMED AND WAS SATISFACTORY. (K)