What was found
AFTER GEAR EXTENSION ON FINAL, DID NOT GET A GREEN LIGHT ON THE RIGHT MAIN. WENT TO FLAPS 15 AND HAD GEAR HORN. RAN THE CHECKLIST AND DID A MANUAL GEAR EXTENSION. THIS WORKED, RECEIVED A GREEN LIGHT AND LANDED. JACKED A/C. CYCLED GEAR, RT MAIN DOES NOT FULLY RETRACT OR EXTEND. SUSPECT TRANSFER CYLINDER OR MAIN ACTUATOR DEFECTIVE. SWAPPED THE LT & RT TRANSFER CYLINDERS, NO HELP. SWAPPED CYLINDERS BACK, LEAK/OPS CHECK OK REF MM 32 32 71. REMOVED & REPLACED THE RT MLG ACTUATOR AND RT MLG BEAM HANGAR. OPS/LEAK CHECKED OK. PERFORMED MAIN LANDING GEAR OPERATIONAL TEST. TEST PASSED GEAR RETRACTS/EXTENDS NORMALLY AND ALL INDICATIONS ARE NORMAL. DE JACKED A/C. REF MM 32 32 11, MM 32 32 93, MM 32 32 00.