Thomas on Warpcast

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https://warpcast.com/~/channel/aviation

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Kent Babin pfp

Thoughts on this one @aviationdoctor.eth? https://www.aljazeera.com/news/2025/2/17/at-least-eight-injured-as-delta-plane-flips-upon-arrival-in-toronto-airport

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Thomas pfp

@aviationdoctor.eth

I’m bit rusty on regulations but I don’t think it’s supposed to do that

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@aviationdoctor.eth

Joke aside, the Flight Radar 24 data seems to show a normal approach but in windy conditions (28–35 kt as per METAR) and possibly gusty on landing, which could lead to a wingtip touching the ground and a subsequent flip. Speculating of course but that would explain one wing being sheared off

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@aviationdoctor.eth

Update: I've now seen the video of the landing taken from a security camera. The aircraft didn't flare / pitch up and just kept descending with a level attitude into the ground at an excessive vertical speed. It was also not banking, so it looks like we can rule out a wingtip touching the ground first. So, it was presumably a very hard landing that caused gear collapse and wing separation on one side, and then rolling over due to the asymmetry of the other wing still being attached and generating lift. My bet is on sudden windshear just before the flare causing the aircraft to slam into the ground. The weather looked terrible in YYZ. Windshear at landing is really the one edge case that we can't do much about safety-wise. As much as we have windshear detectors on the ground and on the aircraft, if it happens at that exact sweet spot just before the flare, there isn't enough time to spool up the engines and go around. At least in those rare occasions, the height is so little that the accident is survivable

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Kent Babin pfp

Thanks for this! I'm going to read up on windshear. I remember a particularly hard landing in Kyiv nearly 20 years ago. Felt like we were dropped onto the runway. Airbus A320, iirc. One of those landings that actually moved things in the overhead compartments.

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CarCulture.eth🎩 🔵 pfp

CarCulture.eth🎩 🔵

@carculture.eth

Wind shear is invisible madness. It comes out of nowhere and there’s nothing you can do about it. I once got caught in a mountain wave caused by wind shear over the Sierras. It was all I could do to hold the wings level while altimeter spun like a second hand. Cut power. Up and down. Finally made it to a valley where I was able to land.

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maurelian pfp

so, what went wrong? Should YYZ just have been closed to arrivals?

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artlu 🎩 pfp

so should we invade Canada or nah

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aerique pfp

No link to the footage?

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Kent Babin pfp

My dad (former bush pilot) had this to say: I’m sure the plane ran into the wingtip vortices of a larger plane that had just landed. They are very dangerous and will easily flip planes. Wingtip vortices can pose a hazard to aircraft, especially during the landing and takeoff phases of flight. The intensity or strength of the vortex is a function of aircraft size, speed, and configuration (flap setting, etc.). The strongest vortices are produced by heavy aircraft, flying slowly, with wing flaps and landing gear retracted ("heavy, slow and clean"). Large jet aircraft can generate vortices that can persist for many minutes, drifting with the wind.

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matthewb.eth pfp

thank you for this analysis

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Fei pfp

I landed YYZ nearly 24h prior so this event really gave me a scare… But reading your analysis helped me realize how rare the conditions for this are, so thanks for your in-depth analysis! So cool to find people like you here ☺️

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johann pfp

awesome, thanks for sharing!

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