What was found
DFW - CREW REPORTED DURING CLIMBOUT CABIN ALTITUDE WARNING ALERT SOUNDED AND MASTER WARNING LIGHT. BOTH PRESSURE CONTROLLERS FAILED. ALSO HAD MULTIPLE ALERTS DURING DESCENT AND CABIN CHIMES COMING ON. EMERGENCY DECLARED FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND WIRE V129A10 AT TOP LEFT SIDE OF 110 RELAY PANEL CHAFED CAUSING DAMAGED TO WIRE BUNDLE. REPLACED WIRES. SYSTEM GROUND CHECK NORMAL OPERATION.