This document describes: a. the preparatory steps to test experimental Type II, III, and IV fluids according to AMS1428; b. the recommendations for the preparation of samples for endurance time testing according to ARP5485; c. a short description of the recommended field spray test; d. the protocol to generate draft holdover time guidelines from endurance time data obtained from ARP5485; e. the protocol for inclusion of Type II, III, and IV fluids on the FAA and Transport Canada lists of fluids and the protocol for updating the lists of fluids; f. the role of the SAE G-12 Aircraft Deicing Fluids Committee; g. the role of the SAE G-12 Holdover Time Committee; h. the process for the publication of Type II, III, and IV holdover time guidelines. This document does not describe laboratory testing procedures. This document does not include the qualification process for AMS1424 Type I fluids.
Some changes have been made to the way holdover times are obtained for AMS1428 fluids. The purpose of this update is to update the standard to reflect the latest process.