Wrong Rudder Cable Nut and Missing Cotter Key

Unairworthy.

4

Wherever a bolt is subject to rotation, it is required to have a castellated nut and cotter key. A typical mistake I see on amateur-built aircraft is the use of a heat nut or fiber nut on the rudder control horn. The second picture shows the proper bolt/nut combination; however, the cotter key is missing.

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4 COMMENTS

  1. Does the note about fiber nut apply to amateur-built? There’s A&Ps out there that say it doesn’t…Seems like best practice to me, but not sure what the FARs say specifically wrt amateur-built.

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