WEST916.LE-14, inspection and repair of locking failure with key

"I can't lock it with a key"

From about a week ago, it seems that it has become more frequent to spin when unlocking.It seems that they decided to ask for an inspection because they could not lock it.

Judging from the symptoms of spinning, I wonder if it's worn out somewhere.If it is a disc tumbler cylinder, there is a possibility of wear.

As soon as I saw it, I felt uncomfortable. It was a WEST916.LSP cylinder, but it protruded considerably.The cylinder was wobbly.I disassembled it and reassembled it using the locking screw.

It was a defective work by the contractor who replaced it when I moved in about half a year ago.