What was found
DURING CLIMB, THE CABIN ALTITUDE WARNING LIGHT ILLUMINATED, FOLLOWED BY THE CABIN ALTITUDE WARNING HORN. CREW DECLARED AN EMERGENCY AND ATC CLEARED THE AIRCRAFT TO A LOWER ALTITUDE AND THE CLOSEST AIRPORT, KCRP. REPLACED THE CABIN ALTITUDE CONTROLLER WITH REPAIRED UNIT. PERFORMED REQUIRED GROUND OPERATIONAL CHECKS OF THE CABIN ALTITUDE CONTROL SYSTEM. ALL WORK PERFORMED IN ACCORDANCE WITH THE DASSAULT FAN JET FALCON MAINTENANCE MANUAL. AIRCRAFT WAS TEST FLOWN AND RETURNED TO SERVICE.