What was found
AFTER TAKEOFF, SHORTLY AFTER GEAR RETRACT, RECEIVED A FIRST EICAS MESSAGE ALT DISAGREE,THEN AIRSPEED DISAGREE, THEN RUDDER RATIO, MACH/SPEED TRIM, THEN BOTH LT & RT EEC STATUS MESSAGE, ELEVATOR ASYM. EMERGENCY DECLARED. LANDING WAS MADE. TAXIING IN, WITH EXCEPTION OF EEC MESSAGES, THE ABOVE EICAS MESSAGES WERE NO LONGER DISPLAYED. TROUBLESHOOTING FOUND RIGHT ADC AT FAULT. R & R IAW MM 34-12-01-024-001. ALSO PERFORMED TEST 30. NO FAULTS AT THIS TIME