What was found
LOSS OF CABIN PRESSURIZATION DURING CRUISE. CABIN CLIMBED TO 10,500 FEET AT FL290 WITH ANTI-ICE ON AND STEADY CRUISE POWER. FLIGHT DIVERTED TO GRB, REQUESTED CFR BECAUSE OF EXPECTED OVERWEIGHT LANDING CONDITION AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE CABIN PRESSURE CONTROLLER, SECURED A CLAMP AT THE DIVERTER VALVE, AND ONE AT THE RIGHT DUCT BOOT. ALL CHECKS WERE GOOD AND AIRCRAFT RETURNED TO SERVICE.