What was found
ON AIRCRAFT CLIMB OUT THE AIRCRAFT EXPERIENCED A CABIN DEPRESSURIZATION, AIRCRAFT RETURNED TO DEPARTURE FOR MAINTENANCE. FOUND MAIN ENTRANCE DOOR FLAP, CATCH PLATE OUT OF ADJUSTMENT. CLEANED, LUBRICATED, AND ADJUSTED FLAPR SEAL AND CATCH PLATE. PRESSURIZED CABIN, LEAK AND OPS CHECK GOOD. WORK PERFORMED IAW MM 52-10-00-720-801, AND 21-32-00-710-801.