Board Thread:Questions and Answers/@comment-26462356-20160923014710/@comment-26462356-20170111061152

Now I have read the link you provided. The answer is that they wanted to lock the outer door open, so they needed someone in a space suit to do that. Then that person, whoever it was, would have to egress along the ship to the next airlock, because the inner door could not be opened if the outer door was locked open.

OK, makes at least some sense. Thanks.