As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FROM COCKPIT THERE IS A LOUD RUSHING AIR NOISE COMING FROM MAIN CABIN DOOR. THE FAS, WHEN ASKED, STATED THAT ALONG WITH THE AIR NOISE THEY ALSO HEARD IT AS A HIGH PITCHED SQUEAL. NOISE BECAME EVIDENT CLIMBING THROUGH APPROX 4000-5000' AND CONTINUED THROUGHOUT THE FLIGHT. REPLACED SEAL. OPS CHECK GOOD. IAW AMM 52-11-28-000-801