What was found
(CAN) AFTER GEAR RETRACTION ON #2 MLG R DOOR & RIGHT UNSAFE LIGHT ON FOR APPROXIMATELY 1 MIN, AIR TURN BACK CARRIED OUT - ALTERNATE GEAR EXT PERFORMED FAULT HISTORY ON FLT LEG: 01, 02, 12, 13, 16 RGUPLK AND RGDRCL FUNCTION TESTED L AND R MLG NEARLY SYNCHRON RETRACTED AND UPLOCKED REPLACED R/H MLG RETRACT ACTUATOR, REPLACED FILTER FITTINGS ON ALTN L/G SELECTOR VALVE, BLEEDING OF HYD SYSTEM #2 PERFORMED. FUNCTION TEST OK, A/C RTS (TC# 20190529015)