As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW WAS UNABLE TO PRESSURIZE THE AIRCRAFT AFTER DEPARTURE. NR1 & NR2 AUTOMATIC CABIN PRESSURE CONTROLLERS INOPERATIVE. CREW SWITCHED TO MANUAL. MANUAL SYSTEM UNABLE TO CONTROL CABIN PRESSURE. NR1 AUTO PRESS SYS DEFERRED IAW MEL. REPLACED FWD OUTFLOW VALVE PER MM 21-31-12-04. PLACARD REMOVED. D382069 CLEARED.