Is it possible that when it fell, it fell into the hole for the emulsion tube?
I know - a long shot, but take a look.
As Stan said, the throttle plates were closed, so if it fell into the throat you should see it sitting on top of the throttle plates. You had a counter weight on the linkage after the incident so they never opened so if it wasn't sitting on a throttle plate then it is somewhere other than the throat.
I'm in the camp of "it's somewhere else in the engine compartment".
It's Brass - Lane could probably help.
(or at least get you a looooooooooong thread!)