What was found
AFTER TAKEOFF, THE AIRCRAFT EXPERIENCED A LOSS OF HYDRAULIC PRESSURE, DURING LANDING GEAR RETRACTION. THE CREW RETURNED THE GEAR TO THE EXTENDED POSITION AND DECLARED AN EMERGENCY WITH ATC. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INVESTIGATION REVEALED A CRACK IN THE BODY OF THE RT MLG RETRACT/EXTEND ACTUATOR. THE ACTUATOR WAS REPLACED WITH A SERVICEABLE UNIT, AND A SATISFACTORY OPERATIONAL CHECK WAS PERFORMED. ALL MAINTENANCE AND CHECKS WERE PERFORMED IAW MM. (K)