Malaysia Airlines Flight 370 is Missing

Re: Malaysia Airlines Plane is Missing

Quickie said:

It's not my guess but from a news source (I can't remember which one off the top of head) . In the system's communication protocol, the technical data is always transmitted whole, to a maximum of a few hundreds characters, as far as I can remember. Even if some information are transmitted in different packets and time , it doesn't really matter because we're talking about a working communication system that is already transmitting the jet engine data.

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The engines themselves may have their own independent transmitter and proprietary data protocol solely for use by the engine manufacturer for the purposes of maintenance logging and performance monitoring. These would not need to be tied into the communication or data network of the rest of the aircraft.

Re: Malaysia Airlines Plane is Missing

From the fuitless seach for wreckage I had a hunch the aircraft didn't crash for a substantial amount of time after transponder signal and normal communication was lost.

I don't buy the theory that the aircraft has been hijacked to land somewhere else for later use in other purposes. If the hijacker needed a plane for crashing into buildings or other such purposes, they needn't bring such scrutiny onto the process of acquiring the aircraft by hijacking a recent vitage commercial jumbo jet with 230 passengers aboard. They could have stood a much better chance of acommplishing this under the radar, so to speak, by going after an older aircraft in freight service, or scavenged one of the many older but still airworthy airframes that lay semi-derelict on world's many lesser airports.

Re: Malaysia Airlines Plane is Missing

chuck731 said:

The engine may have its own independent transmitter and proprietary data protocol for use of the engine manufacturer, not tied into those of the rest of the aircraft.

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The article never mention about different transmitter but why would they need one. It would take a split second to transmit the few hundreds characters of information. The data that's transmitted is separate and independent of the system's data communication protocol, which should be the case because you want to transmit all kinds of information from the technical to the more mundane like passenger's request for services.

Re: Malaysia Airlines Plane is Missing

Quickie said:

The article never mention about different transmitter but why would they need one. It would take a split second to transmit the few hundreds characters of information. The data that's transmitted is separate and independent of the system's data communication protocol, which should be the case because you want to transmit all kinds of information from the technical to the more mundane like passenger's request for services.

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Because they engine data may be proprietary, and its handling system would be self-contained. It would add maybe $1000 dollars to the cost of a 12 million dollar engine to add a independemtn satellite data down link to its manufacturer.

Re: Malaysia Airlines Plane is Missing

chuck731 said:

Really? Then we must have sleep walked to 19,341 feet when my party and I put our names in the summit registery of Kilimonjaro. One symptom of gradual decrompression is actually headache and inability to sleep.

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If the 777 system is in anyway similar to the 737 system (reference Helios Airways Flight 522), then the deployment of passenger oxygen masks probably wouldn't affect what the pilots are doing, since the pilots' oxygen masks do not belong to the same system (i.e. they don't auto deploy the way passengers' do). The pilot might not have recognized a cabin decompression even if the passenger oxygen masks have deployed.

Of course the 777 might have a totally different system. Everything is really just speculation right now.

Re: Malaysia Airlines Plane is Missing

SampanViking said:

If it did manage to fly that way unnoticed, then you may as well scrap every 5th gen aircraft on the books as clearly you do not need them!

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Yup... and Unless they have taken a page from the Swiss Air Defence Manual and closed down after 5pm and the weekends ,they also need to review their air defence systems.

Re: Malaysia Airlines Plane is Missing

I was watching Nightline last night and they were reporting conspiracies theories. The way out kind. I guess that comes with no one knowing anything of what happened.

Re: Malaysia Airlines Plane is Missing

Rolls Royce and Boeing denying the news report themselves.



Published: Thursday March 13, 2014 MYT 9:53:00 PM
Updated: Thursday March 13, 2014 MYT 9:58:11 PM
Missing MH370: No data received after 1.07am, says MAS

SEPANG: Both Rolls Royce and Boeing have denied receiving any data transmitted by the missing flight MH370 after it went missing on March 8, said Malaysia Airlines.

Group chief executive officer Ahmad Jauhari Yahya emphasised that media reports that the engine data was transmitted beyond its last contact at 1.07am on Saturday were untrue.

"We have contacted both possible source of the data, Rolls Royce and Boeing. Both had said they did not receive the data.

"I confirm once and for all that the last Aircraft Communication And Reporting System (ACARS) was at 1.07am Saturday," he told a press conference Thursday.

He was responding to a report in the Wall Street Journal that data routinely downloaded from MH370's engines showed it flew on for four hours after disappearance.

Department of Civil Aviation director-general Datuk Azharuddin Abdul Rahman said the last contact between the aircraft and Malaysia's radar was during the transfer of air traffic control from Malaysia to Vietnam.

"We lost the aircraft from the radar at the point we transferred the air traffic control from Malaysia to Vietnam, specifically, at an area called Igari," he said at the press conference.

The Beijing-bound aircraft with 239 passengers and crew members on board, disappeared from radar screen, about an hour after taking off from the Kuala Lumpur International Airport at 12.41am on March 8.

Re: Malaysia Airlines Plane is Missing

chuck731 said:

Because they engine data may be proprietary, and its handling system would be self-contained. It would add maybe $1000 dollars to the cost of a 12 million dollar engine to add a independemtn satellite data down link to its manufacturer.

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$1000? The cost would be more like installing a second transponder together with its own antenna.

Re: Malaysia Airlines Plane is Missing

They are now expanding to the Indian Ocean

Also the satellites in use are mainly civilian satellites not military satellites the US military satellites are concentrated much North than this keeping a close eye on North Korea not the South China Sea