AMC1 27.1337(b) Powerplant instruments

• ED Decision 2023/001/R found in: CS-27 Amdt 10 - Small Rotorcraft (Feb 2023)

AMC1 27.1337(b) Powerplant instruments ED Decision 2023/001/R FUEL QUANTITY INDICATOR This AMC supplements FAA AC 27.1337 and relates to the susceptibility of the fuel quantity indication accuracy to water contamination. As provided in CS-27, the fuel system shall be designed to resist to different natures and levels of fuel contamination. For water contamination, [CS 27.951(c)](#_DxCrossRefBm8894011) assumes the presence of free water in fuel already saturated with water. To demonstrate compliance with [CS 27.1337(b)](#_DxCrossRefBm8894047), the applicant should take into account the potential water contamination as specified in [CS 27.951(c)](#_DxCrossRefBm8894011). It is expected that the fuel quantity indication should not be affected by water contamination as specified in [CS 27.951(c)](#_DxCrossRefBm8894011). The fuel level sensors should be designed to prevent an accumulation of water that could lead to an erroneous indication of the fuel quantity. [Amdt 27/10]