What was found
ON FLIGHT 3205 LANDING GEAR WOULD NOT RETRACT. ATTEMPTED 3 TIMES ON DEPARTURE. AIR RETURN TO MSP. MAINTENANCE FOUND LT MAIN GEAR STRUT UNDERSERVICED. STRUT WAS HANGING UP AND NOT MAKING WOW SWITCHES, SERVICED LT STRUT PER MM 12-30-32, PERFORMED GEAR SWINGS, ALL OPS CHECK GOOD.