When I worked for those jokers when the TSA first formed we were advised not have passengers remove their prostheses if possible so as not to humiliate them. Just search as best you can with a physical pat down, not like today's crotch grabbing. They have degraded into zero tolerance automatons. I blame TSA upper management for that.
I once had an old fellow in a wheelchair with an artificial leg. He had on a VFW hat and a Screaming Eagles pin I apologized to him before I searched him. He said he understood. In making conversation as I searched him I commented on his pin as in “101st Abrn?”. He replied yes and said “Houffalize” pointing at his prosthesis. I understood immediately. He did not have to remove his leg
As a post script I eventually resigned when it became apparent that the organization was becoming a giant welfare to work program/security theater that was managed by threats and intimidation and were hiring some of the dumbest people I had ever seen.