What was found
HEARD LOUD NOISE FROM CABIN, LOST PRESSURIZATION, UNABLE TO CONTROL. DESCENDED TO 10,000 AT 10,000 MAX CABIN DIFFERENTIAL PRESSURE WAS 0.8, CABIN ALTITUDE 8,000. FOUND DUCT AT RIGHT HAND PACK WATER SEPARATOR DISCONNECTED. RESECURED DUCT, LEAK CHECKED GOOD. PRESSURIZED AIRCRAFT CHECKED GOOD AS PER B727 MM 21-10-0.