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The english translation is not great but am I right in the assumption that the paper claims that the plane took off and sometime during climb one of the aft pax/service doors opened?. was it an A300B4/-600 or A320 airplane?. I have worked on all these types for many years and never heard of one of these doors opening in flight. they will creak and groan a bit like every Airbus Pax door will do but generally speaking very reliable and no problems with tis design which came from the BAC 1-11.