Malaysian airlines has lost a 777

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TangoJuliet

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Jul 2, 2006
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Kaido said:
Part of it too is that we don't have a lot of confirmed information. They can't confirm that the plane was actually reprogrammed before the call (or at all), it's just speculation until they find the plane and look at the black box.

Um wasn't it reported last night that the ACARS transmission at 1:07 contained the information that someone had entered a new route in the FMS?

If that is correct then the plane's route was amended anywhere from 12:37 am to 1:07 am. The signoff with ATC came at 1:19 am with no mention of diverting the plane from its original route
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Um wasn't it reported last night that the ACARS transmission at 1:07 contained the information that someone had entered a new route in the FMS?

If that is correct then the plane's route was amended anywhere from 12:37 am to 1:07 am. The signoff with ATC came at 1:19 am with no mention of diverting the plane from its original route

Hadn't read that, is that confirmed?
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Some good reading on how the ACARS system works:

http://www.washingtonpost.com/blogs...o-satellites-after-its-other-comms-went-dark/

http://www.abc.net.au/news/2014-03-19/tracking-flight-mh370-acars-and-transponder/5331124

So basically, it's a 2-level system:

1. ACARS on the plane
2. Satellite pings

You can turn off ACARS on the plane, but it will still respond to pings from satellites. Regarding the pings:

Could the plane have crashed someplace and kept responding to pings anyway?

Probably not. The pings tell us two things: 1) that the plane has power; and 2) that because it had power, it was likely intact. That still doesn't answer the biggest question of all, however: What happened after the pings stopped?

The final satellite detection was at 8:11am, approximately 7.5 hours after takeoff. They had enough fuel for 8 hours of flight, or about 30 minutes after that. Per the quote above, that would mean that the airplane had power & was likely intact 30 minutes before the fuel ran out.
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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I thought you posted it last night??

Do you have a link to the post? Last I read, they were only (strongly) guessing that it was reprogrammed before the goodnight call. I think the ACARS only gives engine maintenance data, I don't know if it talks to the flight mapping stuff or not.
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Interesting rebuttals to Wired's Chris Goodfellows theory:

http://www.reddit.com/r/MH370/comments/20sasb/very_concise_debunk_of_chris_goodfellows_theory/

http://www.slate.com/blogs/future_t...ellow_s_theory_about_a_fire_and_langkawi.html

It's interesting that the passenger oxygen mask supply mixes with the cabin's oxygen supply, and the pilots get different, better breathing systems (for obvious reasons). And the bottom line is that all we really know for sure is that the airplane stopped communicating, turned off course, and then disappeared.
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Is there any position component with the last sat ping?

Not really, it was too broad. The faint ACARS signal at 8:11am suggests that the airplane was still airborne (responding to ping requests typically means it was still intact) & was "somewhere" over the Indian Ocean. They've broken it down into 2 arcs:

http://www.slate.com/content/dam/sl...ocation map.jpg.CROP.promovar-mediumlarge.jpg

A chart released by the Malaysia government showed the aircraft’s range of possible positions based on the distance traveled by an electromagnetic ping detected by a satellite over the Indian Ocean at 8:11 a.m., at which point, apparently, the plane was still airborne but nearly out of fuel. It consists of two arcs (shown here in red), the northernmost of which goes from the northern border of Vietnam through western China to the eastern portion of Kyrgyzstan and includes the Chinese province of Xinjiang, heartland of the Uyghur ethnic minority.

http://www.slate.com/blogs/future_t...airliner_apparently_flew_to_central_asia.html

Unfortunately, the data is not more specific than that. As of 8:11am, the plane would have only had 30 minutes of fuel remaining, so that limits the search field somewhat, but it's still an enormous area to sift through. Unless it was hijacked & landed, my guess is that we'll never find it.
 

TangoJuliet

Diamond Member
Jul 2, 2006
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This, no?

Here is more on that
http://www.nytimes.com/2014/03/18/world/asia/malaysia-airlines-flight.html?_r=0
http://www.cnbc.com/id/101501652

I think the ACARS only gives engine maintenance data

No, not really. I used to work for the company that developed and hosts the ACARS system. I routinely sent ACARS messages to flight crews that would range from simple ATC instructions to something like hey you left your wallet at home. Its basically a text messaging service.

It would really depend on what ACARS service the airline subscribed to. From the news reports it would seem as though they were getting routine status updates from the aircraft. Since they were over the ocean it would appear that those ACARS messages were being sent through INMARSAT (satellite) rather than over typical VHF/VOR frequencies. That would be the "pings" that they were able retrieve.

Separately, Rolls Royce provided a similar service that would send status reports of the engines. Again, from the news reports, it would appear that Malaysia declined that service since they were getting status updates through ACARS. It would also appear that RR was still able to retrieve the "pings" from that service although it did not contain any information - they were just able to determine that the engines were on. (sort of like roaming on a cell phone)
 

TangoJuliet

Diamond Member
Jul 2, 2006
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The faint ACARS signal at 8:11am suggests that the airplane was still airborne

Why would it have to still be airborne? It would just suggest that the aircraft still had power.

As of 8:11am, the plane would have only had 30 minutes of fuel remaining

Thats not true either. The plane had the capability of flying up to 8 hours but that would depend on how the fuel was consumed. Climbing to 45,000 feet and descending to 23,000 would consume more fuel than flying at their optimal cruise altitude of 35,000. If you believe the flying under the radar theory then the plane would consume way more fuel dropping the range of the aircraft dramatically.
 
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Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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This, no?

Here is more on that
http://www.nytimes.com/2014/03/18/world/asia/malaysia-airlines-flight.html?_r=0
http://www.cnbc.com/id/101501652



No, not really. I used to work for the company that developed and hosts the ACARS system. I routinely sent ACARS messages to flight crews that would range from simple ATC instructions to something like hey you left your wallet at home. Its basically a text messaging service.

It would really depend on what ACARS service the airline subscribed to. From the news reports it would seem as though they were getting routine status updates from the aircraft. Since they were over the ocean it would appear that those ACARS messages were being sent through INMARSAT (satellite) rather than over typical VHF/VOR frequencies. That would be the "pings" that they were able retrieve.

Separately, Rolls Royce provided a similar service that would send status reports of the engines. Again, from the news reports, it would appear that Malaysia declined that service since they were getting status updates through ACARS. It would also appear that RR was still able to retrieve the "pings" from that service although it did not contain any information - they were just able to determine that the engines were on. (sort of like roaming on a cell phone)

Keyword in the articles being "most likely programmed". But the plot is getting weirder thanks the flight simulator & deleted information from the files.

Nice information, thanks! Sounds like a pretty mixed jungle of services & information out there. Hard to nail down anything as conclusive since the publicly-released information keeps changing. Regarding ACARS, does it submit identifying information for the airplane? Can they spoof it if they want to dive-bomb a city somewhere for a terrorist attack?
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Why would it have to still be airborne? It would just suggest that the aircraft still had power.



Thats not true either. The plane had the capability of flying up to 8 hours but that would depend on how the fuel was consumed. Climbing to 45,000 feet and descending to 23,000 would consume more fuel than flying at their optimal cruise altitude of 35,000. If you believe the flying under the radar theory then the plane would consume way more fuel dropping the range of the aircraft dramatically.

Assuming it was over the Indian Ocean, as the satellite data suggests. But the arcs are pretty broad, so being on land isn't out of the question. Has anyone confirmed that it was actually flying low under the radar yet?
 

TangoJuliet

Diamond Member
Jul 2, 2006
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Regarding ACARS, does it submit identifying information for the airplane? Can they spoof it if they want to dive-bomb a city somewhere for a terrorist attack?

In the US, every flight has a registration number. For example, American Airlines Flight 69 (AAL69) is a flight from Madrid to Miami. Any one of AA's fleet could fly that route so to tell what plane it was you would get their registration. So on any particular day N12345 is operating as AAL69.

If I wanted to send an ACARS message I would have to identify its location and find a VOR to send the message. If the plane took a route over the atlantic ocean then the best place to send a message would be over Bermuda's VOR. The time the flight passes over the VOR is short like 15-25 minutes so you have to be quick if you do it that way.

If that did not work, then I would look the plane's registration up in our company database. It would provide us with a code and we used INMARSAT to transmit the message. If it was really urgent we could use INMARSAT to place a SATCOM phone call and speak with the pilots. It was always fun doing that because it wasn't commonplace to get a sat phone call. Most of the pilots had no idea there was a phone that would ring up there. It was also costly, at $7/m (at the time) and most airlines opted out of being able to use SATCOM.

I'm not sure if that answered your question or not.
 
Jul 10, 2007
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I would think that would be too much work - slipping a mickey into the pilot's coffee would do the trick without anyone suspecting anything. Rolls-Royce said the plane flew for at least 5 hours, which would be a long time to have the cabin door locked without any communication from the pilot to the crew or passengers. Plus the satellite picked up a faint ACARS transmission at 8:11am, about 30 minutes before the plane would have run out of fuel, so that would have been nearly 8 hours of flight time of hiding the pilot from the crew. I think it boils down to 4 scenarios:

1. Malfunction
2. Suicide
3. Missile takedown
4. Theft

Malfunction makes the most sense to me right now - say the smoke kills everyone onboard & the autopilot flies until it runs out of fuel. Suicide also makes sense, based on the current information that the plane was reprogrammed before the goodnight call was made. Nobody saw or has claimed a missile attack or other takedown method, so I'd lean towards ruling that out. Theft is a possibility, although the coordination would be somewhat difficult, but if the plane was reprogrammed ahead of time & they did low-flying radar-avoiding maneuvers, then it's possible.

so you're saying... there was a fire big enough to knock out crew + passengers but not big enough as to allow the plane to continue flying for 7 hours.
 
Jul 10, 2007
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Did you see his flight simulator? He did it himself. Dual 7970 Radeon cards, at least 5 or 6 monitors, etc.

i was putting together pc's since I was 10. doesn't meant shit.
and shit was a lot harder back then with interrupts and non-PnP.
 
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Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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so you're saying... there was a fire big enough to knock out crew + passengers but not big enough as to allow the plane to continue flying for 7 hours.

Yup. Smoke kills or knocks everyone out. The passenger oxygen masks only work for 15 minutes and mix cabin air in, so they're not much good in a fire. The pilots have the better masks, which would enable them to change course. Or the plane could have depressurized. Happened to a Learjet back in 1999:

http://en.wikipedia.org/wiki/1999_South_Dakota_Learjet_crash

That plane lost cabin pressure and knocked everyone out, but continued flying for hours until it crashed.
 

CZroe

Lifer
Jun 24, 2001
24,195
856
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Unfortunately, the data is not more specific than that. As of 8:11am, the plane would have only had 30 minutes of fuel remaining, so that limits the search field somewhat, but it's still an enormous area to sift through.
Even without assuming it was flown for maximum fuel economy, it can glide for quite a distance when fuel runs out. I don't think the area is as limited as we'd like to believe.
 

PG

Diamond Member
Oct 25, 1999
3,426
44
91
possible debris:

http://www.deccanherald.com/content/393063/pieces-aircraft-found-floating-andhra.html

Pieces of what is suspected to be an aircraft were seen washed up on Andhra coast Wednesday, a Telugu television channel reported.

Fishermen, who saw them floating at Kutta Gouduru beach in T.P. Gudur mandal of Nellore district in south coastal Andhra off Bay of Bengal, informed the police.

According to a channel, the authorities alerted the top officials. However, there was no confirmation from any official if the objects seen floating were indeed pieces of an aircraft.
 

MaxFusion16

Golden Member
Dec 21, 2001
1,512
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http://edition.cnn.com/2014/03/19/world/asia/malaysia-airlines-plane/index.html?hpt=hp_t1

Investigators looking at the flight simulator taken from the home of Malaysia Airlines Flight 370 Captain Zaharie Ahmad Shah have discovered that some data had been erased from it, Malaysia's acting transportation minister said Wednesday.

Hishammuddin Hussein didn't say what had been deleted, but simulation programs typically store data from previous sessions for later playback. He also did not say who might have deleted the data.

The deletions are not necessarily evidence of ill intent: Removing files from a computer is usually an innocent act repeated millions of times a day around the world.

But experts consulted by CNN said it's relatively unusual to delete such data from a simulator: The files are extremely small and are often kept by desktop pilots to gauge their progress, said Jay Leboff, owner of HotSeat, a simulator manufacturer.

"It would be suspicious to me, because there's no need to do it," he said.
 
Jul 10, 2007
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Yup. Smoke kills or knocks everyone out. The passenger oxygen masks only work for 15 minutes and mix cabin air in, so they're not much good in a fire. The pilots have the better masks, which would enable them to change course. Or the plane could have depressurized. Happened to a Learjet back in 1999:

http://en.wikipedia.org/wiki/1999_South_Dakota_Learjet_crash

That plane lost cabin pressure and knocked everyone out, but continued flying for hours until it crashed.

so it also knocked out all comm and redundancies?
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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Even without assuming it was flown for maximum fuel economy, it can glide for quite a distance when fuel runs out. I don't think the area is as limited as we'd like to believe.

One thing I read was that an airliner can glide about 30 miles if it the engines were to crap out at 30,000 feet. That'd be a pretty significant range to search in...
 
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Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
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so it also knocked out all comm and redundancies?

1. If there was an electrical fire, that could have taken out the electronics. Thailand said the UFO they tracked had an intermittent signal. ACARS & transponders were turned off, but the second-level ACARS (ping from satellite) was still functioning 7.5 hours into the flight, indicating that the plane still had power.

2. It sounds like standard procedure is to shut everything off in the event of a fire (reboot!). Plus you can turn off a lot of the communications systems right from the cockpit as demonstrated in one of the news videos linked above, which is standard procedure when you land so you're not constantly pinging the tower from the ground.

But what's weird is:

1. They think the flight path was reprogrammed prior to the goodnight call

2. One of the pilots had a serious flight simulator at home, apparently with flight path history files that had been recently deleted
 

Zee

Diamond Member
Nov 27, 1999
5,171
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777 pilots are chiming stating you cant have a undetected fire in the wheel for over an hour.
 
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