Please forgive the long-winded question:
We're in the process of rigging our 1969 E33 Bonanza/Debonair. None of the control surfaces were within spec, or even symmetrical. The elevators were especially bad. Our mechanic is trying to wade through various sources to figure out if the C shaped Elevator Rigging Pin (2") is required for setting the elevators to neutral, or if there's something different about rigging a Debonair vs everything else. There's no mention of it (not even an illustration) in the 33 shop manual. I can't even find it in the IPC.
At present, the elevators are neutral simply with the gust lock pin installed. If we try to use a 2" block of wood to emulate the C rigging pin, we find that there's not enough adjustment left in the elevator push-pull tubes to bring the elevator back into neutral (can't make it any shorter, running into the rod ends).
So unless there's another adjustment to bring more travel back to the bellcrank and push-pull tubes, it seems like the gust lock pin hole is where to find neutral (?). There was SI 0660-0155 from way back, but I see no indication in the logs that it was performed on this aircraft. I have to admit that I didn't look at the control column for physical evidence tho. Cable tensions have been set per the 33 shop manual.
Or, do we need the rigging pin after all, and need to reset the cable turnbuckles (one shorter, one longer by equal lengths perhaps?) to move the elevator bellcrank so that the elevator moves closer to neutral (nearly 2" worth) and within the adjustment limits of the push-pull tubes? Would this make setting tension impossible? It's very confusing. We're also seeing that the down travel limit is in excess of 20deg, book indicates 15 +/- 1deg.
It seems crazy that it is so out of rig, and so we're questioning everything.
Thanks for the advice.