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 COMING FROM THE NOSE AREA ON CLIMBOUT. CREW RETURNED TO MSY WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND EXTERNAL POWER DOOR OPEN. MAINTENANCE CLOSED DOOR AND PERFORMED OPERATIONAL CHECKS. NO DEFECTS NOTED. AIRCRAFT WAS RELEASED FOR SERVICE.