As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED ON CLIMBOUT A WHISTLING SOUND COMING FROM THE NOSE AREA. CREW ELECTED TO RETURN TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE GROUND POWER DOOR OPEN. MAINTENANCE SECURED THE DOOR CLOSED. NO DEFECTS OR DAMAGE NOTED AT THIS TIME. AIRCRAFT WAS RELEASED FOR SERVICE.