I'm assuming you are somewhere that doesn't have access to the Commander manuals? I would probably first call the service center you have been using, and ask them to send a copy or help the shop where you are, and if that doesn't work (or you don't have a service center that you have a relationship with), call Twin Commander tech support. I don't know if they are available on weekends, though.
I don't have access to my Maintenance Manual right now... this does make me wonder if I should carry a copy in the baggage compartment in the future, though.