That bolt is in a Heim joint, and it does not move inside the part. Move the flap, and you will not see the bolt spinning with the movement. Now, I am not saying that the rule does not apply here, I just don't think that it does. Anyway, I used castle nuts on mine also, just to be sure.
See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2009 - KR Gathering in Mt. Vernon, Ill There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC -----Original Message----- confirmed in AC 43.13 par7-64a, "DO NOT use self-locking nuts on parts subject to rotation." I saw many aircraft both experimental and certified that used locking nuts in situations that I thought would have called for a castellated nuts and cotter pins. http://www.kr-2s.com/images/krnet/tecnam1_800.jpg