[Dave at Pelican Parts]

Well, you can take the plastic cover off the top... That won't completely dismantle the AFM, but it may give you access to one of the pivot points. You may be able to clean it up and lube it that way.

The flap in the AFM may also be warped, causing it to stick. That is a known failure mode for them, and it is usually caused by a big backfire.

--DD