What was found
CREW REPORTED RAPID DECOMPRESSION AT ALTITUDE PRECEEDED BY A LOW AIRFLOW INDICATION. PASSENGER O2 MASKS DEPLOYED AUTOMATICALLY EXCEPT FOR ROW 7 RT. AN UNSCHEDULED LANDING WAS MADE AT DEN. MAINTENANCE FERRIED AIRCRAFT TO MCI FOR CORRECTION. FOUND INSULATION HOLDING THE FORWARD CABIN PRESSURE RELIEF VALVE OPEN. REPLACED THE FORWARD, PN 103636-1, AND AFT PRESSURE RELIEF VALVES. THE PSU AT ROW 7 DEF WAS REPLACED FOR THE DEPLOYMENT MALFUNCTION, PN 5951092-537. SHOP TEST INDICATES THE PSU ELECTRICAL WIRING LEADING TO THE DOOR LATCH APPARENTLY HAS AN OPEN. CHECK-C 10-18-99 MCI. ---CLOSED---