What was found
AFTER TAKEOFF, RECEIVED AP FAIL AND PITCH CONTROL DISC EICAS MESSAGES. A/C THEN BEGAN UNCOMMANDED ROLL TO THE RIGHT. FLIGHT CONTROLS REQUIRED CONTINUOUS LEFT INPUT FOR LEVEL FLIGHT. CONDITION CONTINUED THROUGH TOUCHDOWN. DIVERTED. EMERGENCY DECLARED. LANDING UNEVENTFUL. REMOVED FROM SERVICE. C/W FIM TASK 27-03-00-810-82H-A, VISUAL INSPECTIONS. NO DEFECTS NOTED. CHECKED CONTROL COLUMN DISCONNECT DEVICE ELECTRICALLY, REF E175 AMM TASK 27-31-06-840-801-A, FOUND DEVICE DISCONNECTED. RECONNECTED PER SAME TASK. PITCH CONTROL DISCLIGHT & AP FAIL MESSAGES EXTINGUISHED. REMOVED & REPLACED DISCONNECT DEVICE PER E175 AMM TASKS 27-31-06-000-801-A/400-801-A AS PRECAUTIONARY MEASURE. OPS CHECKS GOOD. OCF SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.