What was found
CAPTAIN'S AIRSPEED FAILED AND ALTITUDE FAILED ON TAKEOFF ROLL-CYCLED C.B. FOR ADC, MACH, AIRSPEED-NO HELP, ALT WARNING SYSTEM INOP ALSO. (RAIN DURING LOADING WATER IN E & E). FOUND WATER IN E & E COMPARTMENT (HEAVY RAINS DURING LOADING) REMOVED AND REPLACED AIR DATA COMPUTER PER MM 34-12-11. PERFORMED PITOT/STATIC TEST IAW 34-11-0 OPS CHECKED NORMAL, A/C DOWNGRADED TO NOT CAT II, CK A CK B, MOCC NOTIFIED.