What was found
DFAR - FLT EIA 912 - IN CRUISE FROM FSD TO FAR AT 22,000 FEET AND CABIN PRESSURE AT 7 PSI, HEARD A POP AND CABIN STARTED CLIMBING AT 1,500 FEET. DESCENDED TO 10,000 FEET AND CABIN STABILIZED AT 2 PSI AND 8,000 FEET. LANDED IN FAR. LOCATED BLOWN HOSE IN RT TAIL COMPARTMENT AREA. REINSTALLED AND PRESSURIZED AIRCRAFT TO 4.0 PSI. ALL SYSTEMS CHECKED NORMAL. (X)