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-   -   Malaysian Airlines MH370 contact lost (https://www.pprune.org/rumours-news/535538-malaysian-airlines-mh370-contact-lost.html)

GarageYears 14th Mar 2014 18:45

FDR 25 hours
CVR 2 hours

wiggy 14th Mar 2014 18:48

orfeas


have the bbc managed to get inside information from inmarsat?
Or maybe they've simply got somebody watching Skynews (see the comment about a page back).

porterhouse 14th Mar 2014 18:50


The Chinese appear to have other resources to confirm the impact.
I am amazed that one can be so naive putting so much value in the Chinese data. And their satellite image showing the "debris" most likely was a total poppycock, probably some sort of political posturing to brag about their satellites. Also witnesses are notoriously wrong - this includes "Michael" working on an oil rig. I rather believe in "electronic" evidence than 100 witnesses. We know from TWA 800 what witnesses are worth.

overthewing 14th Mar 2014 18:51

At this rate, passengers will soon be required to switch their phones ON during flight, and de-select Flight Mode.

MG23 14th Mar 2014 18:53


Originally Posted by Winston-Smith (Post 8375684)
Is it possible the Inmarsat pings continued to be sent after a crash, or successful ditch at sea attempt?

Possibly, provided the satellite terminal still had power and the antenna was pointed in approximately the right direction. I could imagine that being true for a while after ditching, but it seems unlikely in a crash.

LASJayhawk 14th Mar 2014 18:55

Airspeed and pressure altitude both come from the air data box. Would be 429 data between the air data and instruments and transponders.

Mode S sends altitude out 2 different ways the mode C reply in 100' increments and in mode S in 25' increments. If they agree ( say 35,000 and 35,025) the reply is considered valid. If they disagree ( 35,000 and 31,475) the reply is invalid.

EngineeringPilot 14th Mar 2014 18:56


At this rate, passengers will soon be required to switch their phones ON during flight, and de-select Flight Mode
haha! some hectic Airworthiness Directives are gonna come out soon after this MH370 mystery is gonna be solved. Pretty sure they gonna put in place some sorta GPS transponder that is disable-proof!

djlynch 14th Mar 2014 18:56


It was a moonlit night so a change of course would be obvious from the half moon.
Per the US Naval Observatory's calculator, moonset in KL was 0039 local, well before 370 reached IGARI and the possible course change. Anyone wanting to navigate by the sky would have had to use stars.

Tourist 14th Mar 2014 18:57

CaptainJim

Pitot tubes do not feed altimiters.
Pitot tubes always feed separate systems. That is why you have more than one.
Towed array sonar does not do what you think it does.

Aside from that, sounds like you know what you are talking about, Captain....

PC767 14th Mar 2014 19:01

Cabin crew.
 
Whilst we may consider the actions and motives of the flight crew, what about the cabin crew - have they been considered.

I'm cabin crew, with a ppl, and an interest in aviation. I know the basics of flight. I believe I would be capable of altering the auto pilot coordinates. I'm certain that I could not land a B777 without considerable training. Maybe one of the crew thought they could?

Importantly, as a third party hijacker, I know exactly how to enter the flight deck and would my request would not raise any suspicion. Particularly if I'm equipped with two cups of tea at the top of climb.

Just, another, thought

777JRM 14th Mar 2014 19:01

Further to the moon set times etc, most passengers are not aware of any of that, far less the flight plan route. A turn is just that, a turn on a route, and they do not question it. Turns happen when you are holding, even on airways at higher than normal holding altitudes.

LASJayhawk 14th Mar 2014 19:04

Oh captinjim on #4 if nothing is sent from the air data the mode C will only send out the framing pulses with no data giving an invalid not 0'

CommanderCYYZ 14th Mar 2014 19:06

Question for T7 Drivers
 
Since I have no operating knowledge of the bird, is it, or is it not, possible to disengage SATCOM from the flight deck?

Assuming a hostage/hijack scenario, I'm wondering if it was not possible to shut down the SATCOM, if it was overlooked, or perhaps left on deliberately by the crew.

All conjecture I know, but still an interesting line of thought.

777JRM 14th Mar 2014 19:11

It can be disabled by a check-box in an on-screen menu.

EngineeringPilot 14th Mar 2014 19:11

CaptainJim
 

The fact that the transponder is instantaneously reporting zero while the a/c is 7 miles high in the sky is a key piece of information. The lack of radio reports while the transponder is still working would indicate an in-cabin event which precluded a radio report. Then over a three minute period the transponder ceases reports all together.
It looks like this geographical area is where transponder updates become sketchy as some historic tracks lose data up to a point just short of reaching the Vietnam coast.
All of this points to a rapidly deteriorating electrical system in the aircraft.
The oil rig observation is interesting. The observer is over 300 nm away but it is a dark, cloudless night. His observation of a burning plane would be down near the horizon. But his comment that, from his vantage point, he could percieve no lateral motion lends credibility to his report as we know the plane had just turned more in his direction, head on along with the indication that the event took place much further away than it appears.
If one of those US destroyers in the area is ASW equipped they should run their towed array sonar along 060 to 075 from LKP. The idea it was still in the air for 4 hrs lacks any published data... same as the "military radar" theory.
I think CaptainJim makes a few very good points here. Indeed the B777 flying for 5hrs lacks data, and they have been agreeing and denying this over the past few days. Looks very suspicious to me, not to say the least that a lot of information is not being released to the public.

I would love to see more published data that they obtained.

However, what about the predicted flight path put together by the US military published earlier that suggests the missing plane was heading towards Andaman Islands?

DaveReidUK 14th Mar 2014 19:11


I have noticed differing posting of the last 10 or so flight data points. The original postings in the early days of this event display the last 2 updates with a flight level of zero(0). The recent postings and news reports I've seen in the media seems to fill in those two values with the same 35,000ft as the rest of the 10 updates rather than the original reports of zero.
This maybe a key oversight. And why so many "experts" are focusing on other areas. I believe the last two reports of zero for altitude along with a constant reading for air speed may provide insight.
There is no evidence that the aircraft sent erroneous data for altitude (i.e. zero), speed or position, nor at this stage any reason to believe that it might have done.

I thought we had disposed of this nonsense about 3,000 posts ago. :ugh:

simon001 14th Mar 2014 19:14

Inmarsat
 
One would think the statement that deserves the most attention at the moment is from Inmarsat, when they confirmed receiving signals from the aircraft:

Inmarsat statement on Malaysia Airlines flight MH370 - Inmarsat

The lack of any detail, given the magnitude of the event and the lack of other leads, is surprising. It is as if to say "Hey, we've seen the missing aircraft!" then, well, nothing.

The fact that they did say "...and the details have been passed on to Malaysian Airlines" is a responsible thing, given that Malaysian (Or technically it seems, the Malaysian transport minister) is the official mouthpiece. But the fact that after all this, that Malaysian is tight lipped, is incredible.

I think of the family members, who must be longing for closure, hearing "We've seen the aircraft", but then NO acknowledgement from Malaysian. I can't imagine how frustrating this is.

How about some details? When did you hear from the aircraft? What did you hear? Do you have any position, speed or altitude information? Give us some parameters on the error factors? I mean, give the people something to go on.

Rory166 14th Mar 2014 19:18

oil rig email
 
Ramjet

I read earlier on this forum that the email had been shown to be fake. Is that wrong?

UnderDriven 14th Mar 2014 19:21


Local Moonset in KL was 00:40am, coinciding with takeoff time. As the aircraft was initially eastbound, it is safe to say the entire flight was conducted in darkness, only stars could have provided some directional info to the initiated.
The altitude of the plane would affect the moonset time for those aboard, no?

LASJayhawk 14th Mar 2014 19:25


BobM2
There is no "speed" input to the transponder. ATC gets groundspeed on the target from their own computer.
it the mode S transponder has enhanced surveillance it sends out more data than you might be comfortable with including:
Airspeed
Ground speed
Vertical speed
Track
Bank angle
Desired altitude ( yes it rats out what you've dialed in or have in your flight plan)
Heading

Bout the only thing it doesn't spit out is if the pilot had the turkey on white or the ham on rye for lunch.


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