GM1 26.415(c) Underwater emergency exits

• ED Decision 2022/019/R found in: CS-26 Additional Airworthiness Specifications for Operations (No 2015/640) Part-26 (Mar 2023)

GM1 26.415(c) Underwater emergency exits ED Decision 2022/019/R A possible design solution for the provision of sufficient underwater emergency exits may be to use the passenger cabin windows as additional emergency egress means by including a jettison feature. The jettison feature may be provided by modifying the elastomeric window seal such that its retention strength is either reduced, or can be reduced by providing a removable part of its cross section, i.e. the so-called push out window. Exit designs with the following characteristics, when operated in an upright or any foreseeable floating attitude, would be considered to be compliant with point [26.415(b)(1)](#_DxCrossRefBm881534205) of Part-26 and [CS 26.415(c)](#_DxCrossRefBm881534206): (a) the use of only one hand is needed to operate the exit itself; (b) no part of the opening means (e.g. an operating handle or control) is located remotely from the exit (that requires the person to move away from the immediate vicinity of the exit in order to reach it); (c) any operating handle or control can be gripped using either a bare or a gloved hand; (d) the exit meets the opening effort limitations set by FAA AC 29-2C AC 29.809. The required test, demonstration or analysis may be conducted in a non-capsized attitude (i.e. dry) but considering obstructions that may be present when capsized. [Issue: 26/4] ##### GM1 26.415(c) Underwater emergency exits *ED Decision 2022/019/R* A possible design solution for the provision of sufficient underwater emergency exits may be to use the passenger cabin windows as additional emergency egress means by including a jettison feature. The jettison feature may be provided by modifying the elastomeric window seal such that its retention strength is either reduced, or can be reduced by providing a removable part of its cross section, i.e. the so-called push out window. Exit designs with the following characteristics, when operated in an upright or any foreseeable floating attitude, would be considered to be compliant with point [26.415(b)(1)](#_DxCrossRefBm783605614) of Part-26 and [CS 26.415(c)](#_DxCrossRefBm783605615): (a) the use of only one hand is needed to operate the exit itself; (b) no part of the opening means (e.g. an operating handle or control) is located remotely from the exit (that requires the person to move away from the immediate vicinity of the exit in order to reach it); (c) any operating handle or control can be gripped using either a bare or a gloved hand; (d) the exit meets the opening effort limitations set by FAA AC 29-2C AC 29.809. The required test, demonstration or analysis may be conducted in a non-capsized attitude (i.e. dry) but considering obstructions that may be present when capsized. [Issue: 26/4]