PPRuNe Forums

PPRuNe Forums (https://www.pprune.org/)
-   Rumours & News (https://www.pprune.org/rumours-news-13/)
-   -   Malaysian Airlines MH370 contact lost (https://www.pprune.org/rumours-news/535538-malaysian-airlines-mh370-contact-lost.html)

sterion75 14th Mar 2014 21:12

I consider this to be a fairly important point

Last radar contact at 2.15 in malacca strait. The position being suggested could quite easily have been UAE405 or UAE343 which would have been pretty much on top of this location at that time. They would have seen it or is the military mixing up this blip as it is also a 777?

Just my 2 cents

Robbie

Ian W 14th Mar 2014 21:13


Originally Posted by SeenItAll (Post 8376026)
Agreed that the "triangulation" that would be used would likely not be based on signal strength because the difference in power attenuation would be miniscule between satellites, the atmospheric fade would be different, and because power is measured not to an adequate level of precision. But time can be and is measured to exquisite levels of precision. Differences in time of receipt of signal from satellites is how GPS works. To the extent that location can be inferred, it would be inferred from the difference in time that each satellite received the signal from the aircraft. But unlikely that more than two satellites received a signal, so you would not be working with triangulation, which can resolve to a point on a plane. You would be working with biangulation (is that a word?), which can only resolve to a line. But that would still be extremely useful.

Looking at the INMARSAT footprint maps the aircraft if flying west would be in overlapping cover from two satellites. Add in a secret squirrel with a capability on the same frequency and triangulation might be feasible.

TwoHeadedTroll 14th Mar 2014 21:14

If it is an act of piracy, I don't see that they would need to land the plane on a runway. They could land it on the sea, particularly if they were indifferent to the risk of a water landing. If they then had a reception committee to collect any diverted cargo, they would still have accomplished their mission.

That still presumes some kind of valuable cargo of course...

SQGRANGE 14th Mar 2014 21:15

Moving ahead
 
"Whatever happens I can see a mandated introduction of GPS location reporting for all long haul aircraft relaying constant position reports via a secure sat comms link with no access or control function from from flight deck"


^^^^^^^This, or something along those lines.


Other factors highlighted from MH370 include poor check-in procedures that need to be redressed (not only at KUL but many airports).


There have been concerns expressed by many pilots, that theoretically it is possible to exclude a fellow pilot from the flight deck, how this can be combatted is another issue.


Personally I have pushed for greater psychological evaluations in the past, rather than the odd questions, "so any problems at home" (and I am not inferring anything regarding this flight crew).


And the basics of noshos and procedures highlight the fact unless all procedures are followed to the book, then we increase the risk of an incident.


Sadly we are put under pressure to meet your timeslot to avoid delay (for numerous reasons).


Above all it requires better internal auditing of crews and their procedures, and this includes every facet of the operation.


I am not saying any reasons above caused this incident or could have prevented it, but it does show we have cracks in our systems (and this is systemic throughout the industry).


The reasons for this disappearance will not be known until we find the T7 and when the reason is known, we can implement new or improved checks in. That said, sometimes our worst enemy is complacency or "she'll be right mate".

brika 14th Mar 2014 21:15

Mention has been made that although the flight was not full (with 50 or more unoccupied seats) there were passengers who flew standby. The reason given for this in this thread was that cargo uplift may have limited passenger capacity.

Question - how often does routine cargo on a passenger flight displace this much passenger uplift capacity?

If it was revealed that the cargo included a heavy valuable substance weighing as much as 50 passengers and their baggage, how many reading this thread would change their mind as to likely cause?


Pax list also contained some 30 odd state of the art cyber warfare techies and execs from 5 global organisations, many with direct links to China. Coincidence?

D.S. 14th Mar 2014 21:17

The plotted path
 
as it is best understood


https://pbs.twimg.com/media/BirwabjCIAACtVF.png:large

as provided by
Disparition du Vol MH370 : la zone de recherche étendue à l?Océan Indien | Air Info

This is the path before adding on the new statement from the US/Malaysia team, which indicates around the end point of the plotted path one of two directions were taken - one in the SW direction toward MEMEK and one nearly due north toward SANAR

According to CNN, the US and India have basically determined one of those directions is where the plane will be found, and that is where the two Countries will be looking headed froward

Ailinpictschas 14th Mar 2014 21:17

Has there ever been a Case that Autopilot does 'weird' things after electrical failure, and Crew being unable due to any reason.

Mark in CA 14th Mar 2014 21:18

Sharp Changes in Altitude and Course After Jet Lost Contact
 
This just released by the NY Times:

http://www.nytimes.com/2014/03/15/wo...14&nlid=145194

me myself and fly 14th Mar 2014 21:20

Quote 'live chat on channel 5 in uk currently, not sure how credible panel is...

Correction...after listening to the pilot on there its channel 5 fodder, hardly surprising i guess.' End Quote

Oh my, some dozy 'whatever' just put across a 'cyber hijack' as a credible theory

Righto

shawk 14th Mar 2014 21:20

Via CNN:

A classified analysis of electronic and satellite data, conducted by the United States and Malaysian governments, calculates Malaysia Airlines Flight 370 likely crashed into the Indian Ocean on one of two possible flight paths, CNN has learned.

One flight path suggests the plane crashed into the Bay of Bengal off the coast of India, and the other has it traveling southeast and crashing in the Indian Ocean, according to the analysis.

777JRM 14th Mar 2014 21:20

TAS is the speed relative to the air.
If you want to get somewhere fast, it's GS (groundspeed) that's relevant.

slamer. 14th Mar 2014 21:21

1 August 2005 - A Boeing 777-200 operating as Malaysia Airlines Flight 124 departed Perth for Kuala Lumpur. Climbing through 38,000 feet a faulty accelerometer caused the aircraft's Air Data Inertial Reference Unit (ADIRU) to command changes of altitude. The flight crew overrode the ADIRU and manually returned to land the aircraft at Perth. Subsequent NTSB investigation led the US FAA to issue emergency airworthiness directive 2005-18-51 on the fly-by-wire software.

D.S. 14th Mar 2014 21:22

Gulliver78,

The Chinese "seismic activity" was just that:


The U.S. Geological Survey (USGS) did locate an approximately 2.7 magnitude earthquake off the west coast of Sumatra at the time of the "seismic event" noted by the Chinese, said Harley Benz of the USGS National Earthquake Information Center in Denver.

dmba 14th Mar 2014 21:22


This just released by the NY Times:

http://www.nytimes.com/2014/03/15/wo...14&nlid=145194
I saw a shockingly stupid youtube video of someone attempting to fool people in to believing his montage of various moments and various flights was the MH370 flight.

However, his crazy video did have the aircraft ascending to 45,000 ft...

I fear the author of the article in the NY Times may have been duped and is quoting sources but the source is that poorly made youtube video...

ianwood 14th Mar 2014 21:24


Originally Posted by dmba (Post 8376092)

I fear the author of the article in the NY Times may have been duped and is quoting sources but the source is that poorly made youtube video...

It is very rare the NYTimes gets duped.

kenjaDROP 14th Mar 2014 21:24

@SeenItAll


Differences in time of receipt of signal from satellites is how GPS works.
You are basically right with your explanation about time-measured signal location, but I know Inmarsat works on even more complex system architecture than this and the fundamentals of geo-location of transmissions within their system is somewhat more complex.

I will leave it to someone more qualified than me to explain, but I know that analysis of spot beam coverage and the transmission on particular spot beams comes into the reckoning.

glenbrook 14th Mar 2014 21:24


Originally Posted by VinRouge (Post 8375967)
Glen brook, Not impossible using the Doppler info on the signal from each satellite (frequency shift).

With geostationary satellites, the transmitter and receiver would be stationary relative to one another (excepting the motion of the a/c) and the Doppler effect would give no information on location no?

chris weston 14th Mar 2014 21:24

etudiant 3335
 
Agreed

Jet fuel v Ship Diesel have utterly different Mass Spec signatures screw the Mr Av similarities

With the right kit, the work of a moment to differentiate

Just a chemist

MitrePeak 14th Mar 2014 21:26

slowly but surely..
 
As we are slowly been fed information by various sources, are we being prepared from something they already know ?...disgruntled F/O ? Colleagues/company may have been aware of this ..?
If you log out of acars, then turn off the transponder, then head west via known waypoints, you are either doing this willingly or with, as the expression goes..."a gun to your head ".....

acad_l 14th Mar 2014 21:27

45000 feet?

With the fuel load they had at that point, how high could they go without stalling?

Other interesting question would obviously be: did it first climb and then change direction, or the opposite, or at the same time?


All times are GMT. The time now is 09:45.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.