What was found
(CAN) THE RT, CO-PILOTS, AIRSPEED INDICATOR WAS BEING REPLACED DUE TO A LIGHTING ISSUE. A NEW INDICATOR WAS INSTALLED AND PITOT/STATIC TEST PERFORMED. A MASSIVE LEAK WAS DETECTED AND AN INVESTIGATION WAS INITIATED. AN INSPECTION OF THE NR 2 PITOT/STATIC SYS REVEALED A CRACKED BULKHEAD FITTING DUE TO CORROSION. THE BULKHEAD FITTING WAS REPLACED AND A SUCCESSFUL PITOT/STATIC TEST PERFORMED. SYS WAS CHECKED SERVICEABLE.