As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RIGHT HAND MAIN DUCT PRESSURE REDUCING SHUTOFF VALVE FAILED IN THE CLOSED POSITION. MAINTENANCE INSPECTED AND REPLACED THE MAIN DUCT PRESSURE REDUCING SHUTOFF VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 36-11-03. FUNCTIONAL CHECKS WERE COMPLETED AND THE AIRCRAFT RETURNED TO SERVICE.