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Originally Posted by RGK Sorry to ask about this.
Is there any chance that an avid enthu guy would have experimented some new things on a live flight?
Will automated critical settings be allowed to override by pilots in a flight? |
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Originally Posted by saket77 To answer your questions, my opinion is that since it is all speculation, but yes, the pilot may have tried something out of the books and manual override can overrule autopilot. |
Just to be clear on this: In any plane the pilot can switch on or off or override the auto-pilot at anytime!
The autopilot provides vertical and lateral guidance. Which means it can fly the plane to a particle direction, a heading and an altitude. The auto throttle controls the engines/thrust and is required to maintain a certain speed or to add or reduce thrust when ascending/ descending. These two system can work together to fly more or less the whole flight, from take of landing. I.e. fly the complete track from a vertical/lateral and speed perspective.
At any point in time for any reason the pilots can switch between flying manual and using the auto throttle and or the autopilot. The use of these systems are largely dictated by company procedures and policies. But its up to the captain to ultimately decide what to do and how to deploy these capabilities during the flight.
Various systems are programmed to respond in certain ways, within certain ranges to inputs, either from the yoke, the throttles or other handles and levers. These sort of settings can not be changed by the crew. Or a flight SIM enthusiast for that matter.
There is one thing that this captain probably has done many times. He is a very experience captain and a very enthousiastic flight SIM pilot. He is most likely active on SIM forums, just like me. On some of those forums you will find very detailed discussion on various topics. In depth technical discussion and I have seen many cases where nobody could come up with the exact answer. In many cases the real pilots on those forums will chirp in and check out who certain things work on the real plane.
See for instance, this very detailed technical discussion, where it is an actual 777 pilot that tries something out.
Years ago I had question on how on Boeing 747-400 the position logic algorithm worked. I have several Boeing and Operator manual and they all said something different. Nobody could help, until a 747 pilot tried a few things out during a flight.
So, I would say real pilots that are also SIM pilots are very likely to be trying things out in their real cockpit. And it will actually be very beneficial, because with it comes a greater in-depth knowledge. They don't fiddle around with any critical automated parameters or anything as such. They just observing, very detailed normal responses and reaction of the system they are using everyday
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Originally Posted by srishiva Hopefully they will add transmitters which cant be switched off to relay identification and co-ordinates (then not everyone should be able to access this information).
Engines and some other equipment did send some satellite based pings to ground.
Regarding phones ringing, once the called party is identified in a location and notified of the call, the ring tone is given back to the calling party. There could be something buggy also  But the called party wouldn't have been at 30,000 feet mostly. |
Let me quote a friend of mine, a fellow Dutchman, also called Jeroen, who lives in the USA and works in the aviation industry as communication expert engineer:
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Much, not all, of the tracking and telemetry technology is there purely for commercial reasons only. The vast majority of ACARS is not for safety, but for dispatch management, some maintenance, and weather.
FANS-1/A and the upcoming LINK2000+ systems use ACARS for safety, mostly a combination of automatic 5-minute position reports over the oceans (i.e., outside any radar cover area) and limited textual air traffic control (CPDLC). These systems are widely used over the Atlantic and Pacific, and will be used over mainland Europe soon, but typically they are less well-represented in the Oriental area.
In all cases, there is little redundancy in these systems. One VHF radio, useless beyond 200 nm of a ground station. One SATCOM, mostly Inmarsat and more and more Iridium, which are not reliable if you disturb the plane. And one HF, even less reliable under good conditions. The system uses exactly one of these at a time to relay stuff and switching radio can take up to ten minutes.
In all cases, emergency stuff is done by voice, period.
The idea that it is simple to track all aircraft out there is quite misinformed. The aircraft know where they are, yes, but there is no global simple reliable cheap lightweight broadband communication system. It is all commercial, very few parts of the system are government/military (GPS comes to mind). Somebody needs to pay for this, and it is the passenger, not the tax payer.
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Regarding the ringing tones, see my earlier post. By the way, my professional field is Telecommunication and I have been rolling out and managing Mobile System for twenty years all over the world.
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Originally Posted by RSR What I find baffling is that in this day and age, when even a cheap Chinese white-box smartphone that is lost can be found, or even a wild animal can be precisely tracked with a simple collar, a large commercial airliner that costs a quarter of a billion dollars just vanishes into thin air without a trace  (as the Malaysians would want us to believe).
A humble hiker or mountaineer wandering off the beaten path can use a satellite-based tracker which would enable each and every step of his/hers to be tracked by family and friends, and locate him/her to a precise spot in most parts of the world, should the need arise. All this for a mere 179 EUR, which converts to 15k INR: http://www.findmespot.eu/en/index.php?cid=100
Why can't airlines have something much more sophisticated and capable than this humble device in each plane of theirs?
Even small local taxi and truck operators seem to have real-time GPS tracking for their fleet consisting of a handful of vehicles. Why wouldn't a large international airline want to secure it's very expensive assets (planes) and the lives of hundreds of its customers and employees?
Actually being able to spot something is a very different story though. All one sees is vast, empty stretches of water. In some places, cloud cover prevents one from viewing stuff on the surface of the ocean. Considering the huge expanse of ocean, it's difficult to spot any object (ship or boat), let alone MH370 or any debris. Still, crowdsourcing the search efforts by sharing those high resolution images online is a brilliant idea!  |
See my earlier quote from my friend Jeroen on some of this.
Being able to spot anything in an ocean and or sea is incredibly difficult. There are many stories from people lost at sea who saw ships and planes (that were looking for them) from very close by and they never got noticed.
Jeroen