What was found
#4HYD SYSTEM FLUID LOSS RETURNED TO HIKFOUND RUPUTRED HYDRAULIC ON RT WING GEAR FOR EXTENTION AND RETRACTION CYL. R&RD LINE, CKD CASE PRESSURE AND RETURN FILTER MODULES, DIFF PRESS INDICATORS FOR POPPED CONDITION. CHD CASE DRAIN FILTER MAG PLUGS, NO METAL FOUND. SERVICED #4 HYD SYS FULL. OPERATED GEAR DOOR OPS CKD NORMAL NO LEAKS NOTED.