What was found
THE RED (CABIN PRESS) WARNING LIGHT ILLUMINATED AND THE CABIN DIFFERENTIAL INDICATED OVER 1000. THE AMBER (CABIN PRESS AUTO FAIL) LIGHT DID NOT ILLUMINATE AND THE MASKS DID NOT DEPLOY. CREW PERFORMED A RAPID DESCENT TO 9000 FEET. BOTH PACKS WERE OPERATING NORMAL THROUGHOUT AND AUTO PRESSURE CONTROL APPEARED TO WORK AT THE LOWER ALTITUDE. LANDING WAS UNEVENTFUL. MAINTENANCE FOUND BROKEN CLAMPS AND A DISCONNECTED DUCT ON THE LT WATER SEPARATOR INLET. THEY RECONNECTED THE DUCT, REPLACED THE CLAMPS, LEAKED CHECKED THE SYSTEM, AND RETURNED THE AIRCRAFT TO SERVICE.