What was found
FLT 4463 - DURING CRUISE FROM ATL-MDT, AT APPROXIMATELY 27,000 FEET THE FIRST OFFICERS WINDSHIELD SHATTERED FOLLOWED BY A SMALL GLOW AT THE BASE OF THE RIGHT WINDSHIELD. THE CREW THEN RECEIVED A R WSHLD HEAT CAUTION MESSAGE. THE QRH WAS COMPLIED WITH AND AN EMERGENCY WAS DECLARED. THE AIRCRAFT LANDED SAFELY IN MDT. MAINTENANCE REMOVED AND REPLACED THE NR 3 WINDSHIELD. OPERATIONAL AND LEAK CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)