Real time operating systems are expensive to develop for and require laborious system validation. That's why we decided to use a custom version of Android Jelly Bean running on the latest MediaTek quad core processors featuring Arm Mali gpus. Sensor communications are handled wirelessly with BlueTooth. Be sure to turn off all electronic devices before the flight. :)
All development was offshored to a lowest bidder. Thanks to this, all our critical flight control software is now developed by a single intern aided by Copilot (sic!) We are now looking for a way to optimize the intern away.
Pilot of Boeing flight says he lost control after instrument failure
261–270 of 302 posts
Re: Pilot of Boeing flight says he lost control after instrument failure
#262Earlier quoted context omitted.
This is worthy of reporting. 50+ people were injured, one is in severe condition.
Flight control incidents that cause injuries are not hard to find on avherald. I guess I'm not saying it isn't worth reporting. Before the Boeing Narrative set in, these kinds of stories did get reported! But now they're tied into this long-running Boeing arc, and it's frustrating because there isn't enough in the story to know what's really going on.
I’m reminded of another thread on this site a few months back. One commenter talked about an incident where their flight circled in a holding pattern unable to land for whatever reason. The pilot got on the PA and informed the passengers that they might have to divert as they about 30 minutes of fuel. Around half an hour later, the plane made a desperate run for a nearby airport.
As the story was told, all the flight attendants were white as ghosts. The plane’s engines ran out of gas and shut off, but to the commenter’s existential relief they managed to just make it to the runway.
Of course this is ridiculous. The pilot’s announcement was either grossly misunderstood or very poorly chosen. The plane had plenty of fuel, they had thirty minutes before they would be forced to divert, not thirty minutes total. No cockpit crew with functioning self-preservation instincts would patiently circle around a pattern while their plane inevitably runs out of gas. The engines didn’t run out of fuel; they were brought to idle or low for the descent just like every other landing.
If the plane had truly run out of fuel, the cabin crew would have had the passengers brace for landing. There would have been emergency crews with flashing lights all along parallel taxiways. The plane would have come to a halt on the runway and been unable to taxi. An NTSB report would have been filed. The news would have reported on it.
People replied pointing all of this out, but to my (probably faulty, after all, I’m an eyewitness) recollection they remained steadfast in their telling of events.
And very timely, 737 Gear just published a video discussing Tucker Carlson’s retelling of an incident where his plane crashed[1]. By Tucker’s telling, there was an explosion and the wing broke off mid-flight. The plane crashed into the sand. In reality, the plane’s landing gear collapsed during landing. The plane rolled off the runway.
In short, a passenger’s recall of stressful events is generally worse than useless.
Re: Pilot of Boeing flight says he lost control after instrument failure
#263Earlier quoted context omitted.
https://avherald.com/h?article=51212eb5 https://avherald.com/h?article=515c54c7 https://avherald.com/h?article=5153c289 https://avherald.com/h?article=514dd2cc https://avherald.com/h?article=51474192 https://avherald.com/h?article=50a9fa9f https://avherald.com/h?article=512e34e3 Only three are "anywhere near", but you get the idea, that's just browsing the first page with the accident filter on.
None of those are "flight control issues".
I have heard a lot of passengers recount events from incident flights. I have seen vanishingly few where there was much overlap between what actually happened and what they believe happened.
Re: Pilot of Boeing flight says he lost control after instrument failure
#264Re: Pilot of Boeing flight says he lost control after instrument failure
#265In the Air France flight 11 [0] situation the pilots thought they were having instrument and control issues, they had to go around, and there was much panic in the cockpit. It turned out the entire thing was pilot induced and the aircraft was fine. Because of Boeing's massive failures on the minds of everyone it'll be interesting to see if this was truly an instrumentation failure or something else. [0] https://simpl…
If you read the final incident report[1] from BEA, you'll see that there was a hardware failure - the control yokes got desynchronised from one another which isn't supposed to happen, and the pilots were therefore unaware of conflicting inputs. Worst of all, Boeing doesn't warn in any way if that happens, because why would they? Airbuses (which don't have synchronised sticks) have "dual input" warnings audio and visu…
the control yokes got desynchronised from one another which isn't supposed to happen
No, that's precisely what's supposed to happen. Seriously. On an Airbus with sidesticks opposing inputs get you a dual input warning and have a button to lock out the other set of controls, and the computers just average the inputs. On a Boeing with yokes (e.g. the 777 in question) the way you overcome opposing inputs is simply to pull harder. Past a certain point (I want to say about 50 lb of force), the torque tube linking the controls "breaks" and the controls are desynchronized. If memory serves that means each pilot gets control of the elevator on one side. Worst of all, Boeing doesn't warn in any way if that happens, because why would they?
This is also wildly inaccurate. The yokes are mechanically connected up until you apply enough force to break the connection. The feedback you get as a result serves as a warning. Airbus uses the aural and visual warnings because their sidesticks aren't backfed and you'd otherwise have no idea what the other pilot is doing.There was no hardware failure. Air France simply trains their pilots to a very low standard compared to other airlines.
Re: Pilot of Boeing flight says he lost control after instrument failure
#266Earlier quoted context omitted.
None of those are "flight control issues".
“Flight control issues” is a passenger’s retelling of what they remember a pilot saying. I have heard a lot of passengers recount events from incident flights. I have seen vanishingly few where there was much overlap between what actually happened and what they believe happened.
Re: Pilot of Boeing flight says he lost control after instrument failure
#267Re: Pilot of Boeing flight says he lost control after instrument failure
#268On Dec 2nd 2016 the FAA had issued their airworthiness directive AD 2016–24–09 summarizing: "We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 787–8 and 787–9 airplanes. This AD requires repetitive cycling of either the airplane electrical power or the power to the three flight control modules (FCMs). This AD was prompted by a report indicating that all three FCMs might simultaneousl…
Re: Pilot of Boeing flight says he lost control after instrument failure
#269Earlier quoted context omitted.
How do you suppose a half a trillion dollar market is not a "huge industry"? I am definitely aware of the cultural issues at Boeing, but boiling it down to "sometimes things are simple" is just a lot of ignorance on your part.
I just meant that there are only two companies in the industry at all - the industry being “commercial passenger flight”, or what they seem to call “airliners” (?): Still, in the large commercial aircraft market, there are just two major players: the U.S.-based Boeing (BA) and the Airbus Group (EADSY), formerly known as the European Aeronautic Defense and Space Company (EADS). I totally understand your pushback again…
Btw, people bragging about having lots of common sense are usually the ones that have the least of it.
Re: Pilot of Boeing flight says he lost control after instrument failure
#270Earlier quoted context omitted.
Ask the pilot ?
Can't do that: the pilot can't be allowed to control, or even know about MCAS, because that would affect Boeing's ability to claim the plane is "just another" 737 and that the pilots don't need retraining. Giving the pilot the ability to control MCAS means the pilots all need retraining.