AMC VLA 807(a) Emergency exits
ED Decision 2009/003/R
Unless it is determined that a design is not susceptible to turnover,
the inverted position (turnover) should be considered probable. If escape in
an inverted position is not obvious or is questionable, provisions should be
made in the basic aircraft design to allow the occupants to make a rapid
escape from a turnover position. This may include the design of the emergency
exit or fuselage, the use of materials which are readily breakable or by
installing weak points in the fuselage or canopy.
As an alternative to provisions within the basic aircraft design, it is acceptable to install qualified escape equipment (e.g. crash axe) that would permit the occupant(s) to make a rapid escape from the inverted position. In order to qualify escape equipment, it must be shown by test or by similarity with previous tests, that the equipment can perform its intended function.
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