What was found
MKE/CMH - WHILE CLIMBING THROUGH FL 120, THE CAPTAIN'S WINDSHIELD CRACKED. THE CREW NOTIFIED ATC, DECLARED AN EMERGENCY AND RETURNED TO MKE. AFTER MAKING A SAFE LANDING, MAINTENANCE REPLACED THE WINDSHIELD AND RETURNED AIRCRAFT TO SERVICE. THE CRACK WAS FOUND IN THE OUTER PLY OF THE WINDSHIELD; WITH CRACKING IN THE OUTER PLY, CONTINUED FLIGHT IS ALLOWED. (X)