Kikapu wrote:It has been 5 days now since flight MH370 has disappeared under the noses of ALL the world's surveillance equipment, both here on Earth and ALL those in Space. How can a Boeing 777 aircraft which is very big and very modern, can just vanish into the thin air or into the sea without a trace? We are no longer in the era of Emelia Earhart when her small plane vanished without a trace over the Pacific more that 75 years ago. Personally, I don't think it is possible for it to happen without anyone helping to do just that. So why would anyone want to make the B-777 plane disappear with 239 souls aboard? A good place to start is to find out what this aircraft was carrying in its cargo hold. Were there billions of Dollars worth in Gold Bullion or was it diamonds that would take a team of criminals to hijack this aircraft and fly it below radar coverage almost at sea level and then land at a remote airfield somewhere in Asia? I know it all sounds very “Hollywood” and there was such a movie made called "Airport '77" (
http://www.youtube.com/watch?v=gZUkfmBCsrE ), where such an attempt was made. Is Life imitating Art here? Well, just maybe!
So, what do you think happened to flight MH370?
The key to this puzzle is why the
Transponder Signal was lost?
A Transponder pings the position and location of the Aircraft to Secondary Surveillance Radar. Aircraft are given a unique 4 digit code which allows Radar to interrogate the aircraft and the Transponder provides information such as IDENTITY (registration and Flight Number - MH370), True Air Speed, Indicated Air Speed and Flight Level referenced to 1013 hPa on the altimeters.
Transponders also allow the pilots to Squawk Emergency Codes such as Complete Loss of comms = code 7700, or Hijacking which is code 7500 or loss of radio comms which is code 7600. These codes notify Air Traffic Control of the nature of the emergency. For example, if code 7500 is selected, then Air Traffic Control will cease communications to the aircraft so that it would appear to the hijackers that everything is normal and that they are unaware of the hijacking. In the back ground, Clearances will be given to the aircraft even when it deviates off course and or crosses into other Flight Information Regions and Sovereign Airspace as well as other measures such as possible Military Interception and that could even mean that the Airliner will be shot down if it begins to descend over populated areas as a last resort. When intercepted, comms will be established on Frequency 121.50mHz since it would be difficult not to notice the F18s outside the window.
Some feasible explanations are that this Transponder was placed in STANDBY mode. This effectively switches it off. It is common practice to switch the Transponder in the Standby Mode in order to change the code so as to not cycle through hundreds of codes confusing Air Traffic Control. However, that is for older generation aircraft. In the B777, the Transponder can remain on whilst changing the code because they can simply change the STANDBY code and switch (just like flipping between different radio frequencies on separate radios), but sometimes, pilots do switch to STANDBY (commonly seen in simulators from new First Officers during Endorsement Training particularly if the last equipment they had flown was older generation). STANDBY is not ideal for the following reasons and probably not within Malaysian Standard Operating Procedures:
1) they may forget to switch it back on and within an FIR. ATC will not necessarily tell you to switch it on until cleared to descend or be transferred to Radar or Approach, and
2) it disables the Traffic Collision Avoidance System which relies on all aircraft Squawking a Transponder Code.
So what may have caused the crash? Well, it is very difficult to know without the Flight Data Recorder. But some possible scenarios include:
1) a major catastrophe such as an explosion (a bomb for example),
2) a total on board electrical systems failure,
3) A Transponder malfunction for whatever reason,
4) the Pilot or someone else (possible hijacking) switches the Transponder to the STANDBY position.
So why would a pilot switch to STANDBY? On the Ground, the Transponder is switched to STANDBY. It is turned on whenever on the Runway. In the air, it is something rarely done, and it is outside procedures for all modern Airliners because it does have safety implications. Which is why things like Hijacking and catastrophic explosion can't be ruled out.
That is all I have to say until the Flight Data Recorder is found, because there really is nothing more that I can add.
The Flight Data Recorder, Cockpit Voice Recorder will be found. It's only a matter of time.