What was found
DEBRIS WAS DISCOVERED IN THE PRESSURE LINE TO THE EJECTOR PUMP. THIS CAUSED A LACK OF VACUUM TO THE OUTFLOW VALVES AND ALLOWED THE CABIN TO PRESSURIZE ON THE GROUND.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DEBRIS WAS DISCOVERED IN THE PRESSURE LINE TO THE EJECTOR PUMP. THIS CAUSED A LACK OF VACUUM TO THE OUTFLOW VALVES AND ALLOWED THE CABIN TO PRESSURIZE ON THE GROUND.