As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LOUD WHISTLING NOISE COMING FROM THE LT EMERGENCY OVERWING EXIT DURING FLIGHT. AN EMERGENCY WAS NOT DECLARED AND PLANE LANDED WITHOUT INCIDENT. MX REMOVED LT OVERWING EXIT HATCH, INSPECTED SEAL AND NO DEFECTS FOUND. MX FOUND DEBRIS IN THE DOOR FRAME AREA, REMOVED DEBRIS AND RESECURED HATCH IAW AMM. OPS CHECKED GOOD.