What was found
(CAN) WHEEL WELL FOUND SOAKED WITH HYDRAULIC FLUID , AFTER LAST FLIGHT OF THE DAY. FOUND BRAKE FLUID RESEVOIR DEPLETED. TOPPED OFF BRAKE FLUID RESEVOIR BUT WAS UNABLE TO DETECT LEAK UNTIL THE A/C WAS ON JACKS. WE HAVE HAD 2 PRIOR OCCURRENCES AND DETERMINED THAT WITH THE GEAR EXTENDED THE FLEX LINE IS TAUT. THIS IS REQUIRED IN ORDER TO CLEAR THE WHEEL WELL ON RETRACTION. THERE IS QUITE A LOAD JUST BEHIND THE LOWER FITTING.