As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 2822, CREW REPORTED NR 2 ENGINE N1 SURGING IN CRUISE FLIGHT. AFTER LANDING EICAS MESSAGE WAS E1/E2 SHORT DISP/ E2 NO DISP. THE AIRCRAFT WAS REMOVE FROM SERVICE. TROUBLESHOT, REMOVED AND REPLACED RIGHT 2B FADEC IAW EMB 145 AMM 73-22-01. OPS CHECK GOOD ON GROUND IAW EMB 145 AMM 73-22-01. THE AIRCRAFT RETURN TO SERVICE.