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Software bug at Alaska Airlines caused 2 tailstrikes

提交時間：12天之前

This is what led to the FAA issuing temporary ground holds for all Alaska Airlines flights. (gizmodo.com) 更多...

Ichiro Sugioka

14 個會員評論

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belzybob 12天之前 17

Note the date that the article was published: "Published February 24, 2023"

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linbb 12天之前 -2

After trying to read everything, so did the one hour deal occur yesterday as reported or not? I sometimes miss things but tried to find a current date and didnt.

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linbb 11天之前 0

Ok found the article about yesterdays deal.

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btweston 11天之前 -2

You sometimes miss things… anyone else laugh at this?

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Bill Overdue 12天之前 9

Why are "we" relying on 3rd party vendors for weight & balance calculations? Old news, but relevant information.

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avionik99 12天之前 6

"the tailstrikes occurred largely as the result of a bug in a program sold by a Swedish firm called DynamicSource."

And I bet they will even stay with this vendor who sold them this crap software. Hopefully they will sue Dynamic for all their losses!

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Gary Kendall 12天之前 5

I'm the first to admit, I'm not too smart, but taking over a year to publish this article? Must be a slow news day.

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Brian Chandler 10天之前 1

Its related but it's not. The tail strikes in 2023 were due to the same weight and balance software upgrade that was bugged caused bad weight data and/or giving bad VSpeed data that caused early rotations and tail strikes.

That was 2023, and this week they tried again and failed to implement the same software, which caused the ground stop.

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sparkie624 12天之前 4

A Tail Strike in a 737... that is a Pretty Good software Glitch!

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victorbravo77 11天之前 4

Well, they really are low-riders.

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Arjan Hulsebos 11天之前 2

Sounds more like incorrect input data than a bug, to be honest.

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Mike Heberling 10天之前 0

Unfortunately, pilots seem to be taught to pull the airplane off the runway when they rotate. ROTATE means raise the attitude to a safe AOA (7.5 degrees) and wait for the airplane to lift off. No tail strike.

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N710VE 9天之前 1

Not these airplanes. You’re trained to pitch to the TOGA line in the HUD or if you’re the FO, pitch to the pitch attitude bar in the PFD which corresponds to the FMC generated TOGA line in the Captain’s HUD. A flaw in the FMC data will produce a flawed TOGA pitch attitude, and that was the issue here.

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Mike Heberling 9天之前 1

The TOGA line is not going to command a tail strike attitude. It is only going to command a rotate attitude of approximately 6.8 to 8.0 degrees in the 737 900 or Max9 depending on flap setting. These airplanes were over-rotated (more than 10 degrees = tail strike). Stab trim setting would affect over-rotation more than weight error.

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