This standard specifies the list of test fluids to be used to demonstrate that components and sub-assemblies will not be adversely affected by contamination by fluids types that they may typically be exposed to. The fluids listed are representative of those commonly used and encountered in airborne and ground operations, and align with the requirements of fluids susceptibility of ISO 7137. This shall not be considered an exhaustive list and additional test fluids may be instructed in the product standard, against which compliance needs to be demonstrated. This standard, when used in conjunction with the test requirements defined in Clause 6 or the product standard shall be considered the starting point to test a component to determine its minimum performance capability when exposed to the fluids listed. Test results obtained from a number of sources over a considerable period of time have shown that, in many cases, widely varying results can be obtained when using fluids that are used in service. The practice of specifying fluids based on performance criteria rather than their constituents can mean variations in test results between batches of the fluid obtained from different manufacturers, or even from the same manufacturer. For this reason the EN 3909 Standard recommends the use of "standard test fluids" which are specified by their constituents and contain the chemicals that may be found in commonly used fluids.
EN 3909:2016 Referenced Document
ASTM D740-11 Standard Specification for Methyl Ethyl Ketone*， 2024-04-20 Update
EN 2349-405:2006 Aerospace series - Requirements and test procedures for relays and contactors - Part 405: Fluid resistance*， 2024-04-20 Update
EN 2591-315:2015 Aerospace Series - Elements of Electrical and Optical Connection - Test Methods - Part 315: Fluid Resistance
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EN 3745-411:2007 Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 411: Resistance to fluids
EN 3841-405:2004 Aerospace series - Circuit breakers - Test methods - Part 405: Fluid resistance*， 2024-04-20 Update
EN 4057-303:2005 Aerospace series - Cable ties for harnesses - Test methods - Part 303: Resistance to fluids*， 2024-04-20 Update
ISO 11075:2007 Aircraft - De-icing/anti-icing fluids - ISO type I
ISO 11078:2007 Aircraft - De-icing/anti-icing fluids - ISO types II, III and IV
ISO 1817:2015 "Rubber, vulcanized or thermoplastic - Determination of the effect of liquids"
ISO 7137:1995 Aircraft - Environmental conditions and test procedures for airborne equipment
SAE AMS1428G-2010 Fluid, Aircraft Deicing/Anti-Icing, Non-Newtonian (Pseudoplastic), SAE Types II, III, and IV