As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A LOUD NOISE OUTSIDE OF AIRCRAFT UPON INITIAL CLIMB. CREW RETURNED TO MSY AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE GROUND POWER DOOR OPEN. MAINTENANCE CLOSED AND SECURED DOOR. NO FURTHER DEFECTS NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.