As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - FLIGHT 2586 - LOUD NOISE HEARD FROM LOWER FLIGHT DECK AREA JUST AFTER TAKEOFF ON RIGHT SIDE. MAINTENANCE FOUND THE A/C POWER DOOR LEFT OPEN. INSPECTED DOOR AND FOUND NO DEFECTS AND CLOSED DOOR. CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.