As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT FROM ATL, CABIN ALT CONT TO CLIMB AT 400 FT / MIN TO APPROX 9800 FT. A DESCENT WAS INITIATED AT 27000 FT TO AN ALTITUDE OF 16000 FT WHERE PRESSURIZATION COULD BE MAINTAINED. CARGO VALVE INDICATOR CLOSED THE ENTIRE FLIGHT. CHANGES TO BLEED SOURCES HAD NO EFFECT. PRIMARY OUTFLOW VALVE INDICATOR CLOSED ENTIRE FLIGHT ALSO. REPLACED VALVE, CHECKS GOOD.