ams6110

7 ms·

1.
by ams6110 7y ago
I do think the complacency issue might be a component here. Humans tend to quickly accept recent history as "normal" and over time forget the lessons learned by past disasters. "Those who don't remember history are doome
2.
by ams6110 7y ago
Read the narrative in the report. Why do you suppose that after they got the same initial signs of trouble that the Lion Air flight had (stick shaker on left side, disagreement in airspeed values, etc. immediately after takeoff) that the ca
3.
by ams6110 7y ago
The pilots didn't actually do that. They did not use electric stabilizer trim to "neutralize control column pitch forces before moving the STAB TRIM CUTOUT switches to CUTOUT" in fact the trim had been run markedly down by MC
4.
by ams6110 7y ago
Classic illustration of why conversations between geeky technology people and "normal" people usually and in awkward silence after about two minutes.
5.
by ams6110 7y ago
I see this playing out in a couple of possible ways. One is that it ends up like the DC-10. Public confidence is lost, even though the problem is fixed. The aircraft end up going into freighter service. The other is that they make a convinc
6.
by ams6110 7y ago
You're correct that the AD and runaway trim procedure does not instruct them to extend flaps. What I was addressing was the statement upthread that "Flaps out supposedly would have kept MCAS off but the pilots weren't expecte
7.
by ams6110 7y ago
At the very least it seems that some specific "differences training" on MCAS should have been included. I don't know at what point the differences are enough to require a new type designation.
8.
by ams6110 7y ago
Pilots should have known that MCAS is inactive with flaps extended, per information from Boeing.
9.
by ams6110 7y ago
Yes, pilots selecting "up" on the trim switch should stop and override MCAS. But it also "resets" MCAS so that it will pitch down again on its next cycle. So you'd have to be constantly correcting it, or switch the
10.
by ams6110 7y ago
Post Lion Air, they should have known that.
11.
by ams6110 7y ago
Interesting, that when they turned the electric trim back on, they only momentarily blipped the switches to trim up, and the stabilizer did move. Then five seconds later MCAS pitched down again and it was over. Wonder why didn't they t
12.
by ams6110 7y ago
tl; dr: the false positive rate is too high.
13.
by ams6110 7y ago
This story is disingenuous. For people with "simple" tax situations (no itemized deductions, etc) the forms are already very simple. The scenario they paint with chasing down form after form simply does not happen for most people.
14.
by ams6110 7y ago
Running with a minimalist shoe helps protect your knees. You learn to strike with your middle foot rather than flat-footed or heel first. The shock is absorbed by the muscles and tendons in your calf rather than by your knees.
15.
by ams6110 7y ago
I still don't get it. CGI scripts would run with reduced privileges. The CVE description says "code executing in less-privileged child processes or threads (including scripts executed by an in-process scripting interpreter) could
16.
by ams6110 7y ago
Giving everyone $10K/year would just inflate prices until $10K was the zero baseline for income.
17.
by ams6110 7y ago
If you look at communities where large portions of the population have their basic medical care, food, and housing all provided or paid for by the government, you don't see hotbeds of creative and entrepreneurial activity. You see cess
18.
by ams6110 7y ago
I'd phrase it as "massive taxation reduces the reward of doing business" and therefore, assuming equivalent risk, some number of potential entrepreneurs (and their investors) will decide it's not worth it.
19.
by ams6110 7y ago
Yes that is how human nature evolved. Competition for scarce resources so you and your offspring can survive. This extends to supporting society to the extent it helps your personal survival.
20.
by ams6110 7y ago
Exactly. Those are time killing activities to keep from staring out the window and losing your mind. Which is also a big problem for the elderly and unemployed.
21.
by ams6110 7y ago
You're presumably doing something productive for somebody who's willing to pay you $100K for it. Or do you work for the government?
22.
by ams6110 7y ago
Honestly I think about 5% of people will be motivated by that sentiment.
23.
by ams6110 7y ago
Maybe, if you extend that to free software in general. It's interesting to think about.
24.
by ams6110 7y ago
TFA is from an OpenBSD-oriented blog, and they tend to avoid gnu software if there is another way.
25.
by ams6110 7y ago
Companies that develop aircraft control software do. I read your comment as implying that they don't.
26.
by ams6110 7y ago
The software that runs safety-critical flight controls is actually developed nothing like typical ecommerce or social media. It is designed and developed to an engineering standard. You can review DO-178C requirements[1]. Not all software h
27.
by ams6110 7y ago
Agreed. Hard not to speculate though. I personally find this stuff fascinating from a technical and human factors perspective -- the deaths are tragic of course.
28.
by ams6110 7y ago
No, the working theory I've heard is that the hand-crank trim wheels may have been overwhelmed by the air load on the stabilizer given its "nose down" configuration, probable full "nose up" pull on the elevators, an
29.
by ams6110 7y ago
Turbine engines in theory can run on almost any flammable liquid. However in practice they would need substantial re-engineering. Also ethanol is less energy-dense than kerosene/jet fuel.
30.
by ams6110 7y ago
Combinatorial complextity. It's impossible to foresee every possible combination of failures. There are checklists for the ones that can be foreseen (and these have often been written in the blood of those who discovered them) and mayb

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