As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL370 BEGAN DESCENT TO FL350.GOT IAS DISAGREE, ALT DISAGREE, MACH SPEED TRIM, RUDDER RATIO, L ENG EEC, R ENG EEC EICAS MESSAGES. FOLLOWED CHECKLISTS AND DETERMINED CAPT ADC WAS AT FAULT. SWITCHED TO ALTN SYSTEM. DECLARED AN EMERGENCY AND CONTINUED INTO MEMPHIS. LANDED AT FLAPS 20 PER CHECKLIST INSTRUCTIONS. REMOVED AND REPLACED LEFT CADC AND RELAY K10802