What was found
(CAN) 1 HOUR INTO RETURN LEG, MOTOR LIGHT STARTED TO ILLUMINATE MORE OFTEN, FINALLY RUNNING CONTINUOUSLY BEFORE 60 AMP BREAKER IN FLOOR OPENED. PILOT PERFORMED NORMAL GEAR BLOW DOWN AND LANDED. - MAINTENANCE FOUND GEAR SYSTEM ACCUMULATION PRESSURE LOW.- SYSTEM SERVICED AND RUN, RELEASED FOR FLIGHT. AGAIN FOUND SYSTEM LOW AFTER RETURN TO BASE. SYSTEM SERVICED, AGAIN SAME PROBLEM. SWAPPED ACCUMULATOR WITH ANOTHER AIRCRAFT. BOTH ARE RUNNING FINE. HOLDING PRESSURE.