AMC 31HB.46(b) Pressurised fuel systems

• ED Decision 2009/005/R found in: CS-31HB Amdt 1 - Hot Air Balloons (Dec 2011)

AMC 31HB.46(b) Pressurised fuel systems ED Decision 2009/005/R Connecting parts such as manifolds (including T-pieces) and hoses, between fuel cells should be designed so that they are not subject to pulling forces by significant deformation of the basket during a hard landing. Rigid extensions should be avoided in the design. If rigid extensions are used and could be broken in any likely impact situation they shall be protected. Abuse loads likely to occur, such as the grabbing of a fuel hose by a passenger during landing or the abrasion of a fuel hose by a control line, should be considered. Hoses should be suitably reinforced (e.g. steel braiding) to withstand these conditions. Note: Commercially available brass fittings for LPG systems should not be used as they have been shown not to have the required level of robustness. For fuel system parts extending outside the protected area of the load frame and basket, it should be considered that they might be impacted by obstacles or abuse loads.