Clevis Pins

[Bcone1381]

I am uncertain what the industry best practices - acceptable methods for using Clevis Pins (aka flathead pins in AC43.13). I like Ceivs Pins, simple, light weight, easy to assemble/dis-assemble. I always use the proper length, with a washer and cotter pin, applied when no tension forces are present. Rather than a yes/no input on this example, do you have some general rules for use of clevis pins (flathead, AN392)?

Is it prudent to use a clevis in the positions shown? Note; hardware not specified on plans. (Aileron Bellcrank, Patrol Plans p.8)
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[Chris In Milwaukee]

Well, as a specific use case, all the control surfaces on my Maule use clevis pins in the hinges, so they're certainly durable enough. Ailerons, elevators, rudders -- all of them. Knowing that, I don't think I could find a reason not to use them there. Only reason I could think not to is if you had to have some sort of pressure on the fastener from the end that only a bolt/nut combo could provide, just like you said.

But, like you, this is from inexperienced observation. Just what I've seen used on my plane.

[Mark Goldberg]

I would consult AC 43.13. MG

[Bcone1381]

AC43.13 is pretty silent. It showed me a drawing of a clevis pin and not much more.

[spinningwrench]

Clevis pins are allowed where there is no tension force as you have indicated, washers are a good practice although that is sometimes violated even by commercial airplane manufacturers flying wires in the tail being a typical example. If you are using a bolt instead realize that the threaded portion should not be within the grip range of the connection. I remember this one from my A&P school exams.