CS 22.902  Installation: sailplanes with retractable power-plants or propellers

CAA ORS9 Decision No. 1

Powered sailplanes with retractable power-plants or propellers must comply with the following: 

(a) Retraction and extension must be possible without risk of damage and without the use of exceptional skill or effort or excessive time.

(b) It must be possible to secure the retraction (extension) mechanism in the extreme positions. There must be a means to inform the pilot that this mechanism is secured in the fully retracted or extended position.

(c) Any doors associated with extension and retraction must not impair extension and retraction and they must be restrained against spontaneous opening.

(d) The installation must be so designed as to prevent the heat of the engine from causing a fire or other hazardous condition.

(e) Fuel or lubricant must not discharge in dangerous quantities from the engine, its components or accessories, when the power-plant is in the retracted position and during extension and retraction.