Gust lock

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Gust lock on a rudder.
Gust lock on a rudder.

A gust lock on an aircraft is a mechanism that locks control surfaces in place preventing random movement and possible damage of the surface from wind while parked. Gust locks may be internal or external.

[edit] References

(1971) "Gust lock", The Illustrated Encyclopedia of Aviation and Space 6. A.F.E. Press, pp. 1043. LCCN 68-14013.