Ignition cylinder lock keeps pulling out of my steering column

[55Mach1 10]

I have a 70 tilt column and replaced the cylinder two years ago with a repop from NPD. I recently rebuilt the tilt mechanism again and had the worst time ever trying to remove the cylinder. I inserted the pin and turned with the key but it was always jammed. All of a sudden the past few days when i pull my key out the cylinder wants to come with it. I havent the slightest idea why or if this can be fixed or if something is broken or missing in the recess in my steering column. All i have are these two springs which the cylinder slides into to engage.

 

Any suggestions and should I try to find an NOS cylinder set with keys? What exactly keeps the cylinder locked in place?

[LoneWolf2U 136]

key cyl must be installed in the acc position so ears on end seat.

once it is turned to off position insure the release pin has returned to lock position, or you will have the key cyl slide out problem.

[55Mach1 10]

Looks like my cylinder is defctive or broken because mine does not have that tiny pin it looks to be missimg or broken off somehow this is why the cylinder isnt locking into place. Time to order a new one

 

Is this pin fixed to the cylinder or its a tiny pin that could actually fall out? I dont have my original any longer to compare