What was found
PAX DOOR POPPING NOISE AT FL 310. PRESSURIZED CABIN ON GROUND TO 4.0 COULD NOT DUPLICATE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PAX DOOR POPPING NOISE AT FL 310. PRESSURIZED CABIN ON GROUND TO 4.0 COULD NOT DUPLICATE.