What was found
MAIN (LEFT, RIGHT, AND CENTER) HYDRAULIC SYSTEMSC HYD QTY DECREASED TO ____. QTY STABLE WITH SYSTEM PUMPS OFF CENTER HYD QTY DECREASED TO .46. IT ROSE TO .54 AND IS STABLE. UPON INSPECTION OF CENTER HYD QTY LOSS WITH STABLE HYD PRESSURE FOUNDED THE MLG RETRACT ACTUATOR RETURN LINE LOOSE AND LEAKING HYD FLUID. TIGHTEN HYD LINE AS PER AMM 32-32-01. OPS AND LEAK CHECK GOOD. OK TO CONT. SERVICED THE CENTER HYD SYSTEM TO WITHIN LIMITS PER AMM 12-12-01-301. OK TO CONT.