kayfox

67 ms·

331.
by kayfox 7y ago
Speed trim and the trim system in general.
332.
by kayfox 7y ago
A regime which finds all the defects would cost billions on its own, only one such piece of software has been subject to such a regime and that's the Space Shuttle guidance program. Every other piece of software is tested to levels s
333.
by kayfox 7y ago
I think the main thing we are seeing here is hundreds of smaller fixes that usually form the steady stream of Airworthiness Directives that an aircraft currently supported by the manufacturer sees turning into a news event every single time
334.
by kayfox 7y ago
Its been windy and rainy in the area all week.
335.
by kayfox 7y ago
It could also be that the most popular airliner in the history of aviation is out of production and so investors are reacting to that.
336.
by kayfox 7y ago
Screening of pilots for various issues, mental and performance wise, has increased substantially since 9/11 as well.
337.
by kayfox 7y ago
The problem with reporting around this issue is that its emotionally driven and done often by people who have little experience with how the aviation industry works. So while the exact details are accurately reported in aviation industry
338.
by kayfox 7y ago
The US military has a hundred or so 737 derivatives: https://en.wikipedia.org/wiki/Boeing_737#Other_variants
339.
by kayfox 7y ago
I think the issue is that they have now changed this risk classification of a number of systems and now have to think of stuff like "well, if the variable tag gets bit flipped, what should happen?" Its not really a sign that they
340.
by kayfox 7y ago
in 2018.
341.
by kayfox 7y ago
There's a steady stream of airworthiness directives from plane manufacturers. Old parts get discontinued, new parts have to be used, issues are found and corrected, more inspection is needed, sometimes less inspection is needed. Mo
342.
by kayfox 7y ago
It cant, the forces have to linearly increase per FARs, so MCAS has to be a thing, same type certificate or not.
343.
by kayfox 7y ago
Its a stable design. The force MCAS is correcting is a lightening of control forces near a stall. This is not allowed per FARs, so they added MCAS to force some extra force. It will fly just fine with the computers turned off.
344.
by kayfox 7y ago
Until planes are fully automated, which I don't think will happen anytime soon, pilots are going to be part of every accident. To improve the safety of flying, pilot actions should be considered after every accident and if there are
345.
by kayfox 7y ago
Boeing had an approach to this issue: Your either running the correct version of the CAD software, or you can't check in designs. This also meant that every time it was updated there was a rush to get engineers who's update did
346.
by kayfox 7y ago
Like electric motors controlled by the pilots?
347.
by kayfox 7y ago
Heres what happens when that happens: https://en.wikipedia.org/wiki/Qantas_Flight_72 Television special about that flight: https://www.youtube.com/watch?v=0cS1SMptlnQ
348.
by kayfox 7y ago
The discovery that there's a gulf between what the Boeing engineers (many of whom are pilots) and the FAA previously thought of as runaway trim, uncommanded trim movement, and what they now know about this behavior not being recognized
349.
by kayfox 7y ago
The blade containment is part of the engine itself, which is made by CFM. CFM has had some issues with the generation before LEAP and blade failure, but the last I looked at the reports it appears the blades were contained on the accident
350.
by kayfox 7y ago
That article was published exactly one year after the introduction, at the time about a third of all delivered aircraft to date were delivered, theres some lag from delivery to first revenue flight, so its plausible that less than 100 had b
351.
by kayfox 7y ago
Correction on the Ethiopian flight: They activated the trim cutout, were able to regain most control, and then deactivated it, presumably to adjust the trim, tested that they had trim controls, and then something happened to distract them
352.
by kayfox 7y ago
Ground handling equipment for most of the 737 operators is designed around the low clearance. So if they were to make it sit higher, operators would have to remove a significant amount of equipment. Also the 737-10 does sit higher: https
353.
by kayfox 7y ago
A300: https://airbus-h.assetsadobe2.com/is/image/content/dam/chann... It has trimwheels.
354.
by kayfox 7y ago
On #1. No-one has, other than speculating, confirmed the option is cost difference (there are hundreds of options for the 737 series, many of which are just configuration differences). In the case of the indicator, there would need to be
355.
by kayfox 7y ago
Electronic gremlins that resulted in the temporary loss of flight control responsiveness. In a fly by wire aircraft.
356.
by kayfox 7y ago
On the other hand, the 737 MAX can be flown relatively safely with the computers turned off.
357.
by kayfox 7y ago
Boeing was looking to do a clean sheet design, the airlines wanted to keep the same type rating. The presentation micharacterizes that bit of history, but that's what was going on. This follows what made the A320neo popular, Airbus
358.
by kayfox 7y ago
There is: https://en.wikipedia.org/wiki/Qantas_Flight_72 Edit: To be clear, while this was 10 years ago and noone died, this incident seems to me to be a bit worse than the issues with the 737 MAX in that with the A330
359.
by kayfox 7y ago
They are suspending production of them to avoid various issues: 1. Cash flow issues, since they have hundreds sitting around they haven't been paid for yet. 2. Storage issues, since they have hundreds sitting around. 3. To make it clea
360.
by kayfox 7y ago
Boeing, like many successful businesses these days, is a customer focused company. So ultimately the customers made that decision. You don't spend billions of dollars developing a product that wont sell... unless your Airbus with t

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