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Autoland saves King Air, everyone reported safe

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Re: Autoland saves King Air, everyone reported safe

#191

Earlier quoted context omitted.

I've worked with a startup in the medical device space. Well funded. They were indistinguishable from most other startups, except in one detail: they did everything right. They made some extremely high tech stuff, very lightweight, and technology wise they were closer to watchmakers than to software and hardware people. I loved working with them and helped them to improve their yield (their QA was so strict that of t…

What you describe sounds nothing like most, safety-critical development I've heard of. Whereas, I've heard the other person's story countless times when I studied high-assurance systems. Very slow, top-down, process-heavy, paperwork-heavy, and outdated tools. On the other hand, it sounds like the company you mentioned is worth imitating where possible. They sound awesome. Are you allowed to name them? Is there any wr…

> Are you allowed to name them?

Unfortunately not. But the devices they make are absolute life savers and I found it one of the most interesting jobs I did in the last couple of years because I think I learned more from them than they learned from me. I was just focusing on a handful of details, they had to keep the broader picture in mind all the time and educate me to the point that my knowledge became useful to them.

You are probably right that they are uncommon, but the fact that the company was led by a scientist who was very much involved in the process and the mission and offloaded as much of the non-essentials of the CEO job to others made me feel I had gone back in time to be near HP when they were just founded. In the longer term I expect them to dominate the space.

Re: Autoland saves King Air, everyone reported safe

#192

Earlier quoted context omitted.

> he had not identified the stall Thank you. I had not seen the transcript before. Is it possible that 40/60 kts indicates a stall? Nevertheless, the drop in altitude while the nose was up should also indicate a stall. I know that designing avionics, and accounting for all possible scenarios is a difficult job, and we learn from the failures. But I don't buy that it was impossible/impractical for the avionics to figu…

Consider the inputs the avionics had: 1. 40/60 kts on pitot tubes - could that be showing a flat spin? 2. rotating compass - flat spin? 3. altitude drop - stall 4. attitude - level, no bank 5. engines - operating normally 6. GPS - no forward progress Does that add up to a stall?

I agree that comparing the various sensor data points could allow a reasonable conclusion: e.g. IAS is variable across sensors therefore IAS is unreliable, so what additional information could allow a reasonable diagnosis?

The flight system could identify a stall and prominently alert the pilots. That's one of the recommendations from the report: to implement a dedicated stall warning. The stall warning was actually active, but disregarded/unrecognised by the pilots because of the number of other simultaneous alarms and extraneous information, including an intermittent recommendation from the Flight Director system to pitch up at 12°.

In general, Airbus aircraft don't have a dedicated AOA indicator visible to the pilots; instead AOA is visualised to the pilots by proxy via the airpeed indicator.

For AF447 the flight avionics probably had enough information to bring the aircraft back to straight and level flight without pilot input.

On the other hand the 737 Max crashes were attributed to MCAS overriding the pilot input and lowering the nose, in response to incorrect/faulty AOA sensor data.

Both were extreme examples, and the recommendations probably coalesce somewhere in the middle: better information (and alert prioritisation) for pilots and redundancy in sensors and logic.

Air Astana Flight 1388 also comes to mind. I'm not sure how a flight control system would deduct cross-connected aileron controls and adapt accordingly (without introducing other risks or failure modes). Given the glacial pace of change and approval in aviation, we're probably 20–50 years away from that level of autonomy.

Re: Autoland saves King Air, everyone reported safe

#193
post #96

This is Garman SafeReturn, and this is its first real save. Here's a demo.[1] It's been shipping since about 2020, originally on the Cirrus Vision Jet. There's a lot going on. The system is aware of terrain, weather, and fuel, but not of runway status. So it gives the ground a few minutes to get ready, sending voice emergency messages to ATC. If you watch the flight track, you can see the aircraft circle several time…

This was crew decision and there was no pilot incapacitated...

"Garmin Autoland Activation Was Crew Decision" - https://avweb.com/aviation-news/garmin-autoland-activation-c...

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