As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 360 CABIN PRESS BEGAN TO RISE, SLOW BUT STEADY, TO EXTENDED LIMITS. HAD TO DESCEND TO 10000 FT. DEFERRED PRESSURIZATION CONTROL SYS M PROCEDURES COMPLIED WITH REF 21-18. PERFORMED OPERATIONS CHECK OF MANUAL PRESSURIZATION IAW AMMM 21-31-00. OPERATIONS CHECKED GOOD IAW ITEM 3 FOR AUTO MODE. MEL REMAINS OPEN. R & R ELECTRO PNEUMATIC OUTFLOW VLV IAW AMM 21-31-03. OPERATIONS CHECKED GOOD, MEL RESTORED IAW NRWC 900-DFW-02107.