AMC 25.869(c) Fire Protection for Oxygen Equipment

• ED Decision 2003/2/RM found in: CS-25 Amdt 27 - Large Aeroplanes (Jan 2023)

AMC 25.869(c) Fire Protection for Oxygen Equipment ED Decision 2003/2/RM 1 High-pressure shut-off valves should be designed to provide effective slow opening and closing, so as to avoid the possible risk of fire or explosion. 2 Re-charging systems, if installed, should be provided with means to prevent excessive rates of charging which could result in dangerously high temperatures within the system. The charging system should also provide protection from contamination. 3 The compartments in which high-pressure system components, including source(s) are located should have adequate ventilation to ensure the rapid dilution of leaked oxygen. Such compartments should also provide adequate protection against contamination by liquids and other products which could result in the risk of fire. 4 Where in-situ charging facilities are provided, the compartments in which they are located should be accessible from outside the aircraft and as remote as possible from other service points and equipment. Placards should be provided, located adjacent to the servicing point, with adequate instructions covering the precautions to be observed when the system is being charged. 5 The installation of the system should be such that components and pipe lines – a. Are adequately separated from electrical and fluid systems, b. Are routed so as to minimise joints and sharp bends, c. Are clear of moving controls and other mechanisms, d. Are protected against grease or other lubricants, and are protected against the effects of vibration. In addition, joints should where possible, be assembled dry, but where compounds are used for sealing they should be approved for that purpose. 6 Where the oxygen is supplied from chemical generators, the effects of heat emission, during both normal and inadvertent operation, on both the installation and other adjacent equipment, should be taken into account.