What was found
CREW REPORTED "MAIN HYD QTY LOW" WHITE CAS FOLLOWED BY "LEFT HYD PUMP LOW", FOLLOWED BY "RIGHT HYD PUMP LOW", FOLLOWED BY AMBER "MAIN HYD PRESS" CAS MESSAGES. CREW DECLARED EMERGENCY AND LANDED AT DESTINATION AIRPORT WITHOUT INCIDENT. AFTER LANDING FOUND HYD FLUID COVERING RT ENGINE COWL. MAINTENANCE FOUND HYD PRESS LINE IN CONTACT WITH RETURN LINE RESULTING IN CHAFFING AND SUBSEQUENT LINE FAILURE. LINES REPLACED AND OPS CHECKS PERFORMED SATISFACTORILY. SECOND INCIDENT OF IDENTICAL PROBLEM WITHIN ONE MONTH.