What was found
CLIMBING OUT OF 5,000 FEET, F/O'S ALTIMETER FLAGGED AND STOPPED NUMBER 2 TRANSPONDER FAIL LIGHT ON. AIR TURNBACK TO MKE. REMOVED AND REPLACED F/O'S ALTIMETER AND CHECKED OUT NUMBER 2 TRANSPONDER.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CLIMBING OUT OF 5,000 FEET, F/O'S ALTIMETER FLAGGED AND STOPPED NUMBER 2 TRANSPONDER FAIL LIGHT ON. AIR TURNBACK TO MKE. REMOVED AND REPLACED F/O'S ALTIMETER AND CHECKED OUT NUMBER 2 TRANSPONDER.