Chicago, Illinois - PRELIM INFO FROM FAA OPS CHICAGO IL UAS INCIDENT 0921C CHICAGO TRACON REPORTED THAT ENVOY

PRELIM INFO FROM FAA OPS: CHICAGO, IL/UAS INCIDENT/0921C/CHICAGO TRACON REPORTED THAT ENVOY 3277, E145, GRAND RAPIDS, MI - ORD, REPORTED AN UNAUTHORIZED UAS WHILE ON 10 MILE FINAL FOR RUNWAY 22R AT 3,500 FEET. NO DESCRIPTION OF UAS PROVIDED. NO EVASIVE ACTION REQUIRED. FBI NOTIFIED.