What was found
FLT 4739 - DURING CLIMB-OUT FROM LEX-DFW, WITH THE LEFT PACK DEFERRED THE CREW RECEIVED A RIGHT PACK HIGH PRESSURE MESSAGE. THE QRH WAS COMPLIED WITH BUT THE RIGHT PACK WOULD NOT RESET. SOME PASSENGERS WERE REPORTED AS FEELING ILL AND DIZZY WITH THE COCKPIT BECOMING VERY HOT. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO CVG, LANDING SAFELY. MAINTENANCE RESET THE RIGHT PACK AIR CYCLE MACHINE. OPERATIONAL CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)