The earliest reference to passengers being trapped in an elevator we've found is in the rather flamboyant 1918 testimony of survivor James Leary. His 1915 account, although exactly matching the story outline of his testimony, is considerbly less shrill and does not mention the elevators:
" I didn't realize the danger and went to my stateroom for a life preserver, but couldn't get one in the dark. I searched for two but couldn't find any so got one from a member of the crew. I then found Mr. King, Thos. B. on A deck and said to him that “we'd got it” meaning that we'd been struck by a torpedo. He assented calmly; there seemed to be no excitement. The staff captain announced from the bridge “lower no more boats” and said that he could reach port before the vessel sank. Officers and crew carried the same word to the passengers. In less than 5 minutes there was another explosion. Mr. Alfred Vanderbilt's suite was full of black smoke and wall dust.
"Then the ship took a list and the passengers got excited and not more than two or three minutes afterwards the ship went down. I lost Mr. King.
(1915)
"When I came from this entrance where I went out to look at the hole in the side of the ship, I looked at the ventilators (elevators) and looked up and noticed that they were between the two floors, filled with passengers screaming, and evidently they could not go up or down because the boat was on such a list, and I imagine that is the way they died.
" I started to look in the different rooms for a lifebelt; they were all gone. My room was so far forward and the boat was on such a list that I thought it would be impossible for me to get to it, so as I went along I saw an officer coming along with a lifebelt in his hand…everybody was running around and screaming and looking for a belt; so I saw him I met him in the companion (way) going towards this room and I was trying to get the lifebelt. I had exhausted every place and could not get a belt, and saw him with one in his hand. I asked him for it, and he said “you will have to go and get one for yourself; this is mine.” I said “I thought according to law passengers come first.” He said “Passengers be damned; save yourself first.” I tore it away from him, and I said “you can find one quicker than I can, and if you want this one you will have to kill me to get it.”
(1918) Sure, James, sure.....
We've found....oh....two or three dozen accounts dating to May 8-May 14 1915 in which survivors specifically describe ascending or ascending the main staircase, and not one mentions the jammed elevator. The central motif of the staircase stories is that there was a lot of jostling in the first few minutes but that the crowd thinned out very quickly and that the stairs were soon easily navigated in either direction. The elevator was in an open-cage shaft around which the stairs wrapped, anyone in it would have been plainly visible to anyone who passed up or down, and it is unlikely that every one who survived failed to notice a car with trappped passengers in it.
And, to expand upon Kent's:
>*if* the cars were in operation when the power went down, and people were subsequently trapped inside the lifts, then it was not because the lift attendants were foolishly attempting to operate them.
I don't know if the Lusitania's elevators had safety devices installed to prevent operation by amateurs, but I went to a college that as of the 1980s still had vintage ca. 1916 manual elevators.
In order to make them run, both the outer door and inner cage had to be locked sequentially. There was a lock-release built into the floor which had to be depressed before the outer door or cage could be moved, and which- like a clutch- had to be kept depressed in order to make the up or down lever move.
It was not all that complex, but the thing is it required some training to do. Which, of course, was the entire point. IF such a system was in place on the Lusitania's elevator, then when the attendant abandoned the car it is likely that whoever entered them would have difficulty getting it to move.