A parking brake operating device includes: a lever body; a pole pivotally arranged inside a proximal end portion of the lever body, and restricts pivoting movement of the lever body; and a release rod pivotally connected to the pole, and causes the pole to disengage from the ratchet when a release knob is pushed, the operating portion being provided with a slit being provided with a wide portion into which a pivot connecting portion for the release rod and the pole is introduced, the wide portion being provided in a part of the slit; the wide portion having parallel portions; and the release rod and the pole fitted at positions in the lever body by introducing the release rod and the pivot connecting portion into the operating portion through the slit, and moving the release rod and the pivot connecting portion in this state toward the proximal end portion.

An aeroengine control device comprising a mount, having pivotally mounted thereon a code wheel together with a main lever and a secondary lever, both for turning the code wheel, each lever being movable between a rest position and a maximum actuation position, the secondary lever being mounted to pivot on the main lever. A connecting rod connects the secondary lever in permanent manner to the code wheel and the main lever is provided with a connection member arranged to co-operate with a portion in relief secured to the code wheel and with a portion in relief secured to the mount in such a manner that the connection member attaches to the code wheel when the main lever is moved while the secondary lever is in its rest position and attaches to the mount, thereby releasing the code wheel to turn, when the secondary lever is moved while the main lever is in its rest position, while movement of either lever is prevented when the other lever is away from its rest position.