As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2186, PIT-BOS. (AIRCRAFT DECLARED AN EMERGENCY INTO BOS). 'AT FL 370 MO 78 SIGNIFICANT VIBRATION IN CONTROL YOKE. SUSPECT IN ROLL AXIS PSHMABAY APPROX 60HZ "SHAKER ANTICIPATED EICAS MESSAGE APPEARED. QRH CHECKLIST EXECUTED, ADDITIONAL INFO LIGHT ICING ENCOUNTERED IN CLIMBOUT. SPS TRIGGERED; REMOVED AND REPLACED AIOP 1B MODULE IAW AMM 31-41-10. NO FAULTS NOTED PERFORMED RTS WITH NO FAULTS NOTED A/C OK FOR CONTINUED SERVICE.'