As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1782 - MKE-MLI - AFTER TAKEOFF, THE RT N1 GAUGE BEGAN INDICATING IMPROPERLY. THE CREW MADE AN AIR TURN BACK TO MKE AND LANDING WITHOUT INCIDENT. MAINTENANCE REPLACED AND OPS CHECK THE N1 GAUGE AND RETURNED THE AIRCRAFT TO SERVICE. (M)