As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 1394 - AT FL 270 LOST CABIN PRESSURE. MANUAL PRESSURIZATION DID NOT CONTROL CABIN. PASSENGER OXY COMPT DOORS OPENED AUTOMATICALLY. FLIGHT DIVERTED TO ORD. AIRCRAFT FERRIED TO STL FOR CORRECTION. CHANGED CABIN PRESSURE CONTROL AMPLIFIER, RESEALED SEVERAL SMALL LEAKS IN AIRCRAFT FUSELAGE, AND REPLACED SPLIT FLEX HOSE BETWEEN PRESSURIZATION CONTROLLER AND FILTER. (M)