As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 42408 THE FLIGHT ATTENDANT REPORTED A LOUD SQUEAL FROM THE MAIN CABIN DOOR AND COULD SEE LIGHT THROUGH GAP IN DOOR SEAL. SAME NOISE WAS HEARD FROM FLIGHT DECK. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED SECURITY STICKERS FROM PASSENGER DOOR/FRAME INTERFACE. DOOR FRAME SEAL APPEARS OTHERWISE SOUND AS PER EMB AMM 53-21-01. THE AIRCRAFT WAS RETURNED TO SERVICE.