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unixronin: Galen the technomage, from Babylon 5: Crusade (Default)
Unixronin

December 2012

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Monday, March 23rd, 2009 02:53 pm (UTC)

I have to call them today or tomorrow to see what non-options remain for me to get my laptop.

I have a feeling I'll be inserting this incident somehow into the conversation.

Mockingly.

Monday, March 23rd, 2009 05:24 pm (UTC)
Ack, the crew did not get out. What the hell on that approach?
Monday, March 23rd, 2009 05:30 pm (UTC)
damned if I know. Looks like they came in nose down and just forgot to flare. Altimeter error, perhaps? Though you'd think they'd have noticed the ground was closer than the altimeter said it should be. Possibly a control failure at low altitude? We probably won't know until the accident investigation publishes a conclusion.

Once she started to go over, that really wasn't survivable.


Side note: I read once in Aviation Leak that the most common last words on cockpit flight recorders are "Oh shit."
Monday, March 23rd, 2009 05:46 pm (UTC)
damned if I know. Looks like they came in nose down and just forgot to flare. Altimeter error, perhaps? Though you'd think they'd have noticed the ground was closer than the altimeter said it should be. Possibly a control failure at low altitude? We probably won't know until the accident investigation publishes a conclusion.

An incorrect barometer setting can cause that but you expect that under instrument conditions.

Once she started to go over, that really wasn't survivable.

That crash in Witchita, KS? (Cornfields) apparently rolled and broke up and had survivors at least towards the front of the aircraft. EAS 401 broke up but also had survivors.
Monday, March 23rd, 2009 06:06 pm (UTC)
Well, yeah, there's always exceptions. My brother-in-law was working the tower in Sioux City when United 232 came in.
Monday, March 23rd, 2009 06:29 pm (UTC)
Ah, Sioux City. That's the one I'm thinking of. First time I saw that footage I was amazed anyone got out.
Monday, March 23rd, 2009 10:10 pm (UTC)
I'm still amazed. That crew did an incredible job.
Monday, March 23rd, 2009 06:31 pm (UTC)
Re-examining that footage of that plane cartwheeling down the runway...ack...
Monday, March 23rd, 2009 09:24 pm (UTC)
The accident aircraft almost certainly had a radar altimeter, which is what drives the altitude callouts (not the baro altitude). Regardless, the landing sight picture is primarily driven by visual references, not instrument indications -- ILS category 3 landings (without visual reference to the runway environment) require autoland.

From what little we can see in the very beginning of the clip (look at the first frame), the approach appears normal until the nose drops sharply. The landing seems to definitely be nosewheel-first, with subsequent overrotation leading to a tail strike.

Lots of possibilities here.
Monday, March 23rd, 2009 10:09 pm (UTC)
I didn't pick that up. I thought the bird started out nose-low. There's a big freeze-and-jerk at the start of the video ... I had to replay it about a dozen times to actually see the first second or so of video. But yeah, looking at it again, attitude looks normal in the first few frames, then she suddenly pitches nose-down, then as far as I can tell from blurry pixelated video: nose gear hits first, nose rebounds, LOOKS like roll to left begins there, main gear and left wing hit together with nose still rising, tail strikes as left wing starts to dig in, airframe begins to roll hard over to left, fuel ignites as left wing tears off just inboard of the left engine pylon, roll continues, right wing appears to fail just outboard of the right engine pylon as the bird rolls past about 120°-130°, nose impacts the ground again pretty much cockpit first as roll goes through about 150°, airframe commences sliding somewhere between there and completely inverted.