Revised faa approved deicing program updates winter 2018 2019

Holdover time (HOT) guidelines for de-icing and anti-icing aircraft

revised faa approved deicing program updates winter 2018 2019

The secrets behind De-Icing!


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Airline cancellations were mounting, with some flights on Monday already off the books. In total, more than 2, flights had been canceled from Friday through Monday. That number was likely to grow as the storm moved into the Northeast. All big U. Icy conditions were reported in Omaha Friday afternoon, but it was not immediately clear if that was related.

The successful treatment of ice and snow deposits on aeroplanes on the ground is an absolute necessity to the safety of winter operations. Requirements and guidance can be found in the following ICAO documents:. Part I, Appendix 2, 5.
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From Transport Canada. The holdover time HOT guidelines provide estimates of how long aircraft anti-icing fluids will be effective. They help aircraft flight crews make decisions when de-icing and anti-icing an aircraft on the ground. We update and reissue HOT guidelines every year. Sometimes we publish a revision in the same year.

Aircraft Ground Deicing/Anti-Icing

See the beauty of Winter / De-Icing timelapse at Frankfurt Airport 2018

8900.478 - Revised FAA-Approved Deicing Program Updates, Winter 2018-2019

Cold weather operations, snowy environments and the related issues always pose special challenges for operating pilots. Test data indicate that ice, snow, or frost formations having a thickness and surface roughness similar to medium or coarse sandpaper on the leading edge and upper surface of a wing can reduce wing lift by as much as 30 percent and increase drag by 40 percent. Of course, thicker or rougher frozen contaminants can have increasing detrimental effects on lift, drag, stall speed, stability and control, with the primary influence being surface roughness located on critical portions of an aerodynamic surface. These adverse effects on the aerodynamic properties of the airfoil may result in sudden departure from the commanded flight path and may not be preceded by any indications or aerodynamic warning to the pilot. Therefore, it is imperative that takeoff not be attempted unless the PIC has ascertained, as required by regulation, that all critical surfaces of the aircraft are free of adhering ice, snow, or frost formations. This forms the basis for 14 CFR Critical aircraft surfaces, which must be clear of contaminants before takeoff should be described in the aircraft manufacturer's maintenance manual or other manufacturer-developed documents, such as service or operations bulletins.

Are you ready for snow and ice? Our Winter Operations module reviews operations in ground icing conditions including anti- and deice fluids, deice procedures, holdover times, and pre-takeoff contamination checks. Braking action report, cold temperature altitude corrections, and contaminated runways are also presented. Many Part operators include the module in the initial training as well as have crews complete it each October as a Winter Operations refresher. The IS-BAO standard is for flight crewmembers to complete the training during initial and every two years thereafter.


Aircraft Ground Deicing




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