As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A ON DESCENT PAST 8500' MSL 3.5 DIFFERENTIAL PRESSURE & CABIN ALTITUDE BELOW 1,000' THE LEFT CREW ENTRY DOOR MADE CONSTANT HIGH PITCH SOUND. ACCOMPLISH REPAIR ON THE BOTTOM OF THE CREW DOOR SEAL IAW EO A300-5210-20334-C. LEAK CHECK IS GOOD.