As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 561 - HNL - CABIN ALTITUDE INDICATES BELOW SEA LEVEL WHEN CABIN PRESSURE CONTROL IS SET TO SEA LEVEL. CABIN PRESSURE CLIMB RAPIDLY ON TOUCH DOWN. REMOVED AND REPLACED CABIN PRESSURE CONTROLLER, PRESSURIZATION AND LEAK CHECK GOOD. (M)