As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DECLARED EMERGENCY, DEPARTING OUT OF BWI CLIMBING THROUGH 180 TO FL190 BOTH ENGINE REVERTED TO AUTO THROTTLE ENGINE CONTROL. AUTOPILOT (B) BY REVERTED TO CONTROL WHEEL STEERING ROLL AND PITCH. FIRST OFFICER'S INSTRUMENT BECAME WILDLY ERRATIC AND UNUSABLE WITH LARGE SWINGS OF ALTITUDE AND AIRSPEED. R&R AIR DATA INERTIAL REFERENCE UNIT PER AMM.