What was found
SEA FLIGHT NR 2363: GROUND CREW UNABLE TO OPEN AFT CARGO DOOR. MAINTENANCE OPENED AFT CARGO DOOR AND FOUND DOOR SUPPORT ROD SWIVEL JOINT TO BE HITTING METAL TRIM PIECE ON THE FWD LWR DOOR SURROUND. ADJUSTED METAL TRIM PIECE FOR CLEARANCE FROM SUPPORT ROD SWIVEL JOINT. C/W OPS CHECK OF THE AFT CARGO DOOR IAW Q400 AMM TASK 52-31-00-710-801. OPS CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.