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Listening to the media pretend to understand how a 777 works hurts my ears.
All this talk about programming, or pre-programing a turn is based on what? I can use the FIX page to install a LAT/LONG or a Published Intersection and then use heading select to steer to that point. I can also just use MCP heading select to simply steer, no FMC input required. Did this flight use CPDLC/ADS, FANS 1/A? Did the flight's FMC downlink a changed route via ACAARS (and if so why don't they look at the last waypoint in that downlink)? If CPDLC was used, there is the ability to uplink a new route, and if the crew accepted and executed an upload the aircraft would fly that route (on AP). Just curious how sure they are of a pilot installed/uplinked a FMC flight plan vs. a heading select course on AP. PS. To the media cursing this thread for info, please stop embarrassing yourselves. |
Originally Posted by Mesabah
(Post 1604756)
See, I think the 777 flight computer became self aware, and rebelled against its human opposition.
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Originally Posted by abelenky
(Post 1605651)
On this point, I disagree. Once data has been overwritten once, it becomes very difficult to recover; essentially you'd just be looking for a weak "shadow" signal of the previous magnetic bit.
Once data has been overwritten 4 or more times, it is absolutely impossible to figure out what was there before. And most off-the-shelf data wiping tools will do multiple overwrites. If there is any source/evidence that a government agency can recover data that has been specifically wiped, I'm willing to listen. But short of that evidence, the idea goes against everything i know about hardware, software, and physics. After many wipes you lose the ability to identify discrete data quanta and then get into probabilities. Advanced software can attempt to rationalize those probabilities (akin to a dictionary attack). Wouldn't work for pure random numbers, saying a crypto key but apparently is useful where the source data has some degree of predictability. Also heard that each write cycle may write in a very, very slightly different location which helps isolate "layers" of over-written data (the are mechanical devices after all). |
Originally Posted by CRM114
(Post 1605675)
Did this flight use CPDLC/ADS, FANS 1/A? Did the flight's FMC downlink a changed route via ACAARS (and if so why don't they look at the last waypoint in that downlink)? If CPDLC was used, there is the ability to uplink a new route, and if the crew accepted and executed an upload the aircraft would fly that route (on AP). Just curious how sure they are of a pilot installed/uplinked a FMC flight plan vs. a heading select course on AP. PS. To the media cursing this thread for info, please stop embarrassing yourselves. |
Originally Posted by abelenky
(Post 1605651)
On this point, I disagree. Once data has been overwritten once, it becomes very difficult to recover; essentially you'd just be looking for a weak "shadow" signal of the previous magnetic bit.
Once data has been overwritten 4 or more times, it is absolutely impossible to figure out what was there before. And most off-the-shelf data wiping tools will do multiple overwrites. If there is any source/evidence that a government agency can recover data that has been specifically wiped, I'm willing to listen. But short of that evidence, the idea goes against everything i know about hardware, software, and physics. |
Originally Posted by Softpayman
(Post 1605688)
I'm thinking a lot of this info is coming off the ADS-B. It looks like among the info it sends is a sort of Position report including next waypoints. If you had reprogrammed your 2nd and 3rd next fixes it would appear here. And it sounds like it was there 12 mins prior to the final ATC transmission.
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Originally Posted by abelenky
(Post 1605651)
On this point, I disagree. Once data has been overwritten once, it becomes very difficult to recover; essentially you'd just be looking for a weak "shadow" signal of the previous magnetic bit.
Once data has been overwritten 4 or more times, it is absolutely impossible to figure out what was there before. And most off-the-shelf data wiping tools will do multiple overwrites. If there is any source/evidence that a government agency can recover data that has been specifically wiped, I'm willing to listen. But short of that evidence, the idea goes against everything i know about hardware, software, and physics. And Edward Snowden has said that properly implemented "encryption works". The folks who seem to think that the NSA has divine powers don't know anything about computers or forensics. The way law enforcement "breaks encryption" is to depend on keyloggers or sticky notes with passwords on them. They "recover data" when people hit the "delete" key, not when they deliberately overwrite data. I, too, am willing to listen to evidence to the contrary. I haven't seen any. |
Originally Posted by rickair7777
(Post 1605634)
Unless the HDDs were melted down, government agencies can probably recover the data if they want it bad enough.
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Originally Posted by Ftrooppilot
(Post 1605784)
Could be the deleted files are "bathing suit models ??????" :eek: on the home computer / simulator.
Maybe even pre-typed thread postings and responses to APC forums? :eek: |
Originally Posted by RhinoPherret
(Post 1605624)
Yep. I can see it now. Feds mandate GoPros on every flight deck with auto upload to YouTube. That will surely solve any future dilemmas of this nature. :rolleyes:
A possible grand idea hatched from a hoot that was forced to resign suddenly becuase he was so inept and despised by just about everyone but possibly Vlad Putin. |
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