As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESS DIFF JUST BELOW THE RED AT FL330. PER CAPTAIN DEBRIEF, NOTHING PHYSICALLY FELT BY PAXS OR CREW. CPC BITE TESTED WITH NO FAULTS ON 1 & 2. PRECAUTION REPLACED CABIN PRESS CONTROLLERS 1 & 2, CABIN PRESS INDICATOR PANEL & REMOTE DIFFERENTIAL SENSOR.