I don't know if it was the same elevator, but it probably works the same as the extra traincars the Ishimura has that you have to bring up to the rails at the start of DS1. The unitoligists might also have fixed it, as there was a unitologist send on a mission to retrieve something. Her audio log is close to the elevator, she is lying dead at the top, so she must have used the elevator to go up.
Sorry to double post, but I just got some extra information. It seems it is highly likely that the female I was talking about is Karrie Norton, the unitologist engineer that is the playable character in Dead Space Mobile. She would be very able to repair the elevator. The woman in the log refers to herself as Norton and is a unitologist on a mission.