SAE ARP5945B

The purpose of this ARP is to provide the sample selection criteria and endurance time test procedures for SAE Type I aircraft deicing/anti-icing fluids required for the generation of endurance time data of acceptable quality for review by the SAE G-12 Holdover Time Committee. A significant body of previous research and testing has indicated that all Type I fluids formulated with conventional glycols, as defined in 3.1.1 of AMS1424, perform in a similar manner from an endurance time perspective. This applies to Type I deicing/anti-icing fluids formulated with propylene glycol, ethylene glycol, and diethylene glycol only. As a result, Type I deicing/anti-icing fluids containing these glycol bases no longer require testing for endurance times. The methods described in this ARP shall be employed, however, if endurance time testing of a conventional glycol-based Type I deicing/anti-icing fluid is desired or requested by a fluid manufacturer, operator, or other organization. Fluids formulated with non-conventional glycol, as defined in 3.1.1 of AMS1424, and all non-glycol Type I deicing/anti-icing fluids must be tested for endurance times using the methods described in this ARP (as appropriate). This document has been updated to reflect current practices for conducting endurance time tests with SAE Type I fluids. Notably, updates have been made to test materials used, and the section describing the criteria for conducting repeat tests in simulated freezing precipitation has been clarified. Additional revisions have been made to meet the document harmonization and quality criteria issued by the SAE G-12 Steering Committee in October 2023. Specifically, the spellings of various technical terms have been revised to conform to the preferred spellings put forth by the committee. Finally, a page numbering issue in the previous version of the document has been corrected.