Anti-crash method and system, an undercarriage, and an aircraft

摘要

An undercarriage ( 2 ) for an aircraft ( 1 ) includes anti-crash elements that are specific to a second stage of a crash after the end of a first stage. The undercarriage includes: a device for blocking a retraction actuator ( 6 ); a device for retaining the actuator ( 6 ) functionally separated from a landing gear leg ( 9 ); and a device for applying controlled braking to the pivoting of the leg ( 9 ) by irreversible lengthening of a deformable member ( 25 ).