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This supplement forms a part of the Aerospace Recommended Practice ARP4737, Aircraft Deicing/ Anti-icing Methods. It shall be used to identify SAE Types I, II and IV fluids holdover time guidelines.

The purpose of this SAE Aerospace Standard (AS) is to provide guidelines for the components and configurations that define the four versions of the Weather Support to Deicing Decision Making (WSDDM) winter weather nowcasting system.

The purpose of this SAE Aerospace Standard is to provide guidelines for the components and configurations that define the research and commercial versions of the Weather Support to Deicing Decision Making (WSDDM) winter weather nowcasting system.

This document establishes the minimum criteria for ground based aircraft deicing/anti-icing with fluids to ensure the safe operation of aircraft during icing conditions. This document does not specify requirements for particular airplane models.

This document establishes the minimum criteria for ground based aircraft deicing/anti-icing with fluids to ensure the safe operation of aircraft during icing conditions. This document does not specify requirements for particular airplane models.

This document establishes the minimum requirements for ground based aircraft deicing/anti-icing Methods and procedures to ensure the safe operation of aircraft during icing conditions. This document does not specify requirements for particular airplane models.

This document establishes the minimum requirements for ground based aircraft deicing/anti-icing Methods and procedures to ensure the safe operation of aircraft during icing conditions. This document does not specify requirements for particular airplane models. NOTE: Particular airline or aircraft manufacturers’ published manuals, procedures, or methods supplement the information contained in this document.

This document establishes the minimum requirements for ground based aircraft deicing/anti-icing methods and procedures to ensure the safe operation of aircraft during icing conditions on the ground. This document does not specify the requirements for particular aircraft models. The application of the procedures specified in this document are intended to effectively remove and/or prevent the accumulation of frost, snow, slush, or ice contamination which can seriously affect the aerodynamic performance and/or the controllability of an aircraft. The principal method of treatment employed is the use of fluids qualified to AMS1424 (Type I fluid) and AMS1428 (Type II, III, and IV fluids). All guidelines referred to herein are applicable only in conjunction with the applicable documents. Due to aerodynamic and other concerns, the application of deicing/anti-icing fluids shall be carried out in compliance with engine and aircraft manufacturer's recommendations.