CS 22.607  Locking of connections

CAA ORS9 Decision No. 1

An approved means of locking must be provided on all connecting elements in the primary structure and in control and other mechanical systems which are essential to safe operation of the sailplane. In particular, self-locking nuts may not be used in any bolt subject to rotation in operation, unless a non-friction locking device is used in addition to the self-locking device.