As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT ROTATION, CAPTAINS STICK SHAKER ACTIVATED. CREW ALSO RECEIVED AN ALPHA SPEED INDICATION ON LOWER LEFT HAND CORNER OF CAPTAINS ADI AND BOTH FLIGHT DIRECTORS WERE INOPERATIVE. FLIGHT RETURNED TO FIELD AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE LEFT AIR DATA COMPUTER, THE LEFT INERTIAL REFERENCE UNIT, AND THE LEFT AOA VANE.