What was found
PILOT REPORTED THAT AFTER EXTENDING THE LANDING GEAR DURING APPROACH, A RT MLG UNSAFE INDICATION WAS OBSERVED. BROKE OFF APPROACH TO TROUBLESHOOT THE UNSAFE INDICATION. PERFORMED THE LANDING GEAR UNSAFE INDICATION CHECKLIST IAW THE QRH AND STILL HAD AN UNSAFE INDICATION; COMPLETED LANDING GEAR EMERGENCY EXTENSION IAW THE QRH CHECKLIST, STILL HAD THE UNSAFE INDICATION. PERFORMED A FLY-BY OF THE TOWER, AND TOWER AND MECHANIC REPORTED THE LANDING GEAR APPEARED TO BE DOWN AND LOCKED. DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. INSPECTION OF THE RT MLG REVEALED THE INBD LANDING GEAR ACTUATOR HOUSING WAS SHEARED FROM ATTACHMENT PIN. MX REPLACED RT MAIN GEAR INBD ACTUATOR.