What was found
DURING CRUISE AT FL350, THE RED CABIN PRESS ANNUNCIATOR LIGHT ILLUMINATED. CREW COMPLIED WITH COM AND PERFORMED AN EMERGENCY DESCENT AND DIVERTED TO A NORMAL SAFE LANDING AT DFW. MASKS DID NOT DEPLOY. MAINTENANCE BITE OF THE SYSTEM SHOWED NR 2 CONTROLLER FAULT CODE 5 AND FOUND A LOOSE SENSE LINE TO THE RIGHT FLOW CONTROL VALVE. LINE WAS SECURED AND PRESSURIZATION WAS CHECKED WITH AN ENGINE RUN-UP. ALL CHECKS WERE GOOD AND THE AIRCRAFT RETURNED TO SERVICE.