As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2044 - MKE-CWA - DURING FLIGHT, THE CAPTAINS ALTIMETER FLAG APPEARED IN FLIGHT. THE CREW MADE AN AIR-TURN-BACK AND AN UNEVENTFUL LANDING IN MKE. MAINTENANCE REPLACED THE CAPTAINS ALTIMETER, OPS CHECKED IT AND RETURNED THE AIRCRAFT TO SERVICE. (M)