De-icing Process at YUL From an Aircraft Window Aviation Winter Safety Pre-Takeoff Procedure 🇨🇦 2023

Watching the deicing and anti-icing process through window of an ‪@airbus‬ A220 on an ‪@aircanada‬ flight to LAX (Los Angeles) at Montréal-Pierre Elliott Trudeau International Airport operated by ‪@aeromag.official‬ (Aero Mag 2000).
Today we are looking at de-icing process, through the Window of an Airbus A220 of an Air Canada flight, I was on recently. We are in Montreal heading for Los Angeles on a very light snowy morning. For an efficient take off of an aircraft, it needs to be free of ice buildup, especially on the critical surfaces as the wings. The pilot or an engineer decides if the de-icing is needed based on many factors of winter operations. The Montreal international airport has a state-of-the-art deicing facility that can accommodate up to 8 aircrafts simultaneously.
Several de-icing technicians work on one aircraft at a time to ensure rapid service and minimize delays of flights. Transport Canada has strict guidelines, on winter operations of aircrafts. It is imperative not to attempt takeoff until all of the control surfaces are free of frost, ice or snow contaminants. The fluids used in the process is glycol. Made of ethylene, diethylene or propylene. There are four categories of fluid used on aircrafts for deicing - Types I to IV.
Type I is a mixture of glycol and water with orange dye, heated to a certain degree. This solution is used for cleaning out the contaminant already buildup on the aircraft. If the captain has requested a tactile test, or if the deicing operation deems needed, they will conduct a sweep on the surface to determine that the surface is contaminant free.
If there is no precipitation, just type I application is used according to guidelines. The other types are used after the Type I application. Type II is being replaced by Type IV; therefore, mostly Type IV is applied. This solution is 100% glycol with a green dye and a thickening agent to increase viscosity.
By the way, type III is only used on smaller aircrafts, with slower takeoff speeds like 60 knots. This step is actually not deicing, it is an anti-icing, designed to keep the aircraft surfaces forming further contaminants until take off. It is also designed to shear off the surface of aircrafts once it reaches a certain speed about 100 knots.
By the way, the access glycol that gets drip to the ground during this process gets recaptured and recycled by a system of pipes that run under the deicing bays depending on the weather and atmosphere holdover time (HOT) can vary from 20 minutes to over an hour. HOT is how long an aircraft has for takeoff after anti-icing application is completed. if the HOT time has passed, then aircraft must go through the entire process again of de-icing and anti-icing.
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*TIMECODES *
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00:00 Intro
00:18 Montreal Airport
01:05 Deicing Bays
01:26 Deicing Process
02:13 Deicing Fluid Types
02:51 Application of Type I glycol mixture
03:37 Tactile Test
04:16 Type IV application
05:08 Recycling of glycol
05:24 HOT - Holder Over Time
05:52 Takeoff
07:21 Outro
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De-icing Process at YUL From Aircraft Window Aviation Winter Safety at 🇨🇦 2023
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[@tev3009]

Thanks for sharing

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