Depressurisation causing electrics to fail
 

My theory is from the knowledge from what I know flying the 737.

If the cabin depressurises the cooling fans warning lights in the electric bay will go on ,as the thin air struggles to keep the temperatures cool in the electronics bay. This could result to systems shutting down or CBs popping due to over heating. Could result in the transponder failing

Just an idea anyone also think the same or disagree be good see

Saturn, wasn't aware there was a radar.

Ref depress, it's on our jet, the idea is you create as much flow from the packs though the outflow to suck out the nasties. As well as the option of opening up various bits n bobs which again assists with smoke extraction. Obviously his is less of an option for civil liners.

And the VHF coverage would be even less the further below 30,000 feet the aircraft was.

Good point. If all comms are out then get within range and make a telephone call. If there was gradual loss of cabin pressure resulting in a hypoxic event then they would be none the wiser and the aircraft would follow its assigned course. If it was a sudden event that damaged systems then how come altitude and heading changed in a seemingly controlled manner? Acars must have useful information that would answer many of these questions. I only suppose that there is something the Malaysians havent come to terms with yet.

RR must receive many thousands of ACARS per day and only irregularities would be flagged up.
Do RR actually know which airframe the engines are fitted to or does it just send the serial number followed by mx message?
If this is the case then assuming the engines were functioning normally then nothing would have appeared abnormal and maybe RR have only just been asked for data?

News Conference on in 30mins

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Watch the #Malaysia news conference on missing #MH370 live on @skynews & Sky News - Latest News From The US And Around The World in 30 mins.

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Actually, the data may indeed be logged on some enthusiast's computer. I've logged ACARS in the past, was amazed what was sent in the clear to and from my own planes, crew lists with passport and employee numbers, APU oil needs servicing and, yes automatic engine readings with lat longs and altitudes. These messages were formatted but not encoded, no harder to read than NOTAMS or WX.

Also, HFDL is easily logged thousands of miles away, there is a small user group on Yahoo. I've logged it with free software, the traffic was similar to ACARS.

Hobbyist ADS-B receivers are all over Asia, they form the basis for the networks that feed Flightradar24.com - Live flight tracker! and RadarBox24.com - Airspace Live . The initial transponder loss was tracked by FR24 as noted here.

One would have thought rr would have process in place the minute an aircraft is missing or goes in to lock down all data related to the engines fitted. I can't imagine they would risk losing valuable data that could prove or disprove any engine related faults.

Any connection or inference that can be drawn:

Malaysian plane search revives Sri Lankan tycoon?s missing jet mystery | The Sri Lanka Reporter

Vinrouge,

Air Operations

Aerial of the runways.
http://map.vbgood.com/diego%20garcia/diego_garcia2.jpg

An airliner going AWOL is about as irregular as it gets. Taking four days to request/gather possibly elementary data would constitute a monumental negligence.

As has been said, there must be MUCH more to this disappearance than is publicly known. Time will tell.

MAS official disputes RR data showing MH370 flew on for four hours | Malaysia | The Malay Mail Online

No; for this reason:

"At 9:02 pm the aircraft suddenly shattered the speed of sound, traveled at 1,352 km/h"

And regarding "MAS official disputes...":

These guys need communication coaching. Surely they must be in a position to state clearly whether the engine ACARS signals are transmitted only to themselves, or not.

Day 6 Press Conference in 5 minutes...
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Given that anyone can receive and decode ACARs, even if MAS think they are the only source of truth about its reception, they clearly are not.

Just saying, given the fact that RR received engine data for 5hrs of flight, while Malaysia Airlines presumably assumed it's B777 flew for only about an hour, I can assure you that those real-time engine data are obtained/accessible to both Malaysia Airlines engine's department of engineering as well as RR.

It is just unclear how, on the 5th day of searching, that they decided to check engine data, both from RR and Malaysia Airlines (who are apparently opposing that 5hrs engine flight data that RR is saying to have obtained). All I am saying is, there is a lot not being told.

p.s. What are they saying at the press conference? I don't have access where I am..

Everyone is speculating about why RR and/or Boeing didn't report the ACARS messages right away. Please consider the likely possibility that they did report it right away to their national security services in the UK and/or US. When these security services were notified, they must have considered the very real scenario that a plane has gone completely missing and has flown for several hours without any communication. Their primary interests at that point are going to be to quietly ascertain as much information as possible about that plane and its intentions/possibilities/potential whereabouts and act accordingly. They would want to do so prior to telling the world that they have acquired all this data.

I bet if the ACARS showed a normal looking descent or shut down event (i.e. a landing), we won't know about it for some time. It leaves the baddies thinking we still don't know if they survived or where they might be. Not to mention telling the world there's a plane in rogue hands could spark false alarms and panic.

Briefely:

* Engine data is 'inaccurate'
* Chinese satellite photo was released by 'accident' and nothing found in that area.
* Malaysia is accepting all help from any one offering, they are not hiding anything.
* Military radar data released to China and USA
* Last ACARS transmission at 1.07am local time, nothing else after that.
* Boeing and RR have not recieved any data.

Is that really a "fact"?

The idea that RR would leak engine information seems difficult to credit.

That a "Malaysian Airlines executive" who's lost a large airplane can know more about engine data transmission than RR is preposterous.

The report in a post above that RR received two bits of information from the aircraft at take off and top of climb smells much more realistic.

They said categorically no ACARS transmissions after 1.07 local.