What was found
DIVERSION, WHILE CRUISING AT FL 390 CABIN ALTITUDE RATE OF CHANGE WENT TO 4000 FPM CLIMB. R & R AFT OUTFLOW VLV ASSEMBLY IAW AMM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DIVERSION, WHILE CRUISING AT FL 390 CABIN ALTITUDE RATE OF CHANGE WENT TO 4000 FPM CLIMB. R & R AFT OUTFLOW VLV ASSEMBLY IAW AMM.