Whenever a nut is subject to rotation, it is required to have a drilled bolt, castellated nut, and cotter key. In the top photo you can see that the proper bolt/nut combination is correctly used on the forward rudder cable link attachment, but not on the aft one. Similarly, in the bottom photo the nut on the control column, which uses a brass insert as a bushing, requires a castellated nut. If a bolt is used through a rod end bearing, the use of a fiber locknut is approved, as the bushing in the rod end bearing rotates instead of the bolt.
In Case You Missed it
What’s New
Sportairs Sirius LSA is available for demo flights, the Spider Tracks viewer allows you to track flights on your iPhone and MGL Avionics Second Generation EFISes debut. Edited by Mary Bernard
All About Avionics
Stein Bruch - 0
Stein Bruch reviews the airborne weather choices for the homebuilder, using technology undreamed of only 20 years ago.
Design Process: Vertical Tail Spin Considerations
Not every airplane is designed to perform intentional spins, but that doesn’t mean the...