As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/AEXTREMELY LOUD SQUEAL EMANATING FROM FORWARD ENTRY DOOR. IT BEGAN IN THE CLIMB PASSING 19,000 FEET (7 PSID) AND STOPPED AT 29,000 FEET (8 PSID)FOUND NO DAMAGE TO DOOR SEL OR FRAME CLEANED DOOR SEAL PER AMM 52 09 02 NO NOISE ON GROUND DURING PRESSURE CK