AMC 25.807(e) Emergency Exits Uniformity

• ED Decision 2017/015/R found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

AMC 25.807(e) Emergency Exits Uniformity ED Decision 2017/015/R FAA Advisory Circular 25.807-1 ‘Uniform Distribution of Exits’, dated 08/13/90 is accepted by EASA as providing acceptable means of compliance with CS 25.807(e). However, this Advisory Circular does not provide any guidance for those aeroplanes required to have no more than one pair of emergency exits. For those aeroplanes, ensuring that the seat-to-exit distance remains within acceptable limits as per the following criteria provides an acceptable means of compliance with CS 25.807(e). Each passenger seat approved for use during taxiing, take-off or landing should be located such that: (i) it is within 9.14 m (30 ft) from the nearest emergency exit on one side of the fuselage, and within 13.72 m (45 ft) from the nearest emergency exit on the other side of the fuselage; and (ii) the occupant of that seat has the possibility to move to an emergency exit, on the left side, or the right side of the fuselage, whilst at all points along the way remaining within 9.14 m (30 ft) from an emergency exit on one side of the fuselage and within 13.72 m (45 ft) from an emergency exit on the other side of the fuselage. When calculating the distance from a passenger seat, or from any point in the egress path of an occupant, to an emergency exit, this distance should be taken as the total longitudinal distance (i.e. as measured parallel to the aeroplane’s longitudinal axis) that the escapee should cover in order to get to the emergency exit in question (i.e. the distance calculated should take into account all required changes in direction of movement but measured only longitudinally). For the distance from a passenger seat, as the starting point, the front edge of the seat bottom cushion at the centreline, with the seat in the taxiing, take off, and landing position is to be taken for seats installed at any orientation. The end point in each case is to be taken as the nearest edge of the emergency exit opening in the fuselage. For aeroplanes with a passenger seating configuration of 19 or less, only one pair of emergency exits is required. However, such aeroplanes may have additional exits installed, which must then comply with CS 25.807(h) but not with the 18.3-m (60-feet) rule of CS 25.807(f)(4). The distance between each passenger seat and the nearest available emergency exit may be determined considering all available emergency exits, including the ones addressed by CS 25.807(h). [Amdt 25/19]