What was found
(CAN) RUDDER LIMIT FAULT STATUS FOLLOWED BY STALL FAIL CAUTION, AS WELL AS, EFIS COMP MON/IAS LEAD 2 MACH TRIM CAUTION MSG. FOUND P3 DRAIN TUBE 2/3 FULL WITH WATER. WATER DRAINED AND LEAK TEST CARRIED OUT, IAW MM 34-11-00-790-803. CHECKED SERV. CREW REPORTED THAT F/O AIRSPEED WENT TO ZERO IN FLIGHT, MDC ALSO SHOWS MULTIPLE FAULTS RELATED TO NR 2 ADC. NR 2 ADC REPLACED AND TESTED, IAW MM 34-13-01-400-801. CHECKED SERV RUDDER TRAVEL LIMIT CHECKED SERV, IAW MM 27-25-00-710-802. SPC CHECKED SERV, IAW MM 27-35-01-710-801. ALL OTHER MESSAGES MENTIONED BY CREW HAVE CLEARED IN MDC AND EICAS. ALSO HAD THE CABIN PRESSURE CONTROLLER FAIL 4X WHILE TROUBLESHOOTING, B CODE=006158. REPLACED AND TESTED CONTROLLER, IAW MM 21-31-04-710-801, CHECKED SERV STILL UNDETERMINED CAUSE WAITING FOR TEARDOWN ON ADC TSR 10348 CSR 5444 DSR 1241. (TC# 20180530012)