As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWA - FLT 14487 - AIRCRAFT WOULD NOT PRESSURIZE ABOVE 10,000 FT CABIN SHOWED 300 WITH 1500 FT MIN CLIMB, OUT FLOW VALVE FULL CLOSED. CLEANED AND LUBED OUTFLOW VALVE LINKAGE AND ASSEMBLY. REMOVED ICE FROM OUT FLOW VALVE. PERFORMED OPS OF PRESSURIZATION. SYSTEMS OPS GOOD IAW DC-8 GMM 21-31-00. (M)