Missing dependency

The creator has a username of Jerusalem_Is_1. He/She has never posted in these forums nor has he/she ever uploaded anything to the DLS.

A Google search returned only your post asking for its whereabouts. So it seems that not even that notorious Russian Pirate web site has it.
I found it. It's in the misc section on Wig Wag Simulations. Download "GE AC traction motor sounds".
The next thing to consider is what happens if you use this asset in something that you upload to the DLS? Anyone who downloads it will have the same problem and frustration as you just had.