Avionski udesi i nesreće

[ducca]

http://mondo.rs/a673939/Info/Svet/Malezijski-avion-snimljen-nad-dzunglom.html

 

[Muwan]

Još jedna ekskluziva™ iz neimenovanih izvora je demantovana:

 

 

During the press conference the Malaysian authorities also dismissed a report that the plane was programmed to change course before the co-pilot issued the “all right, goodnight” sign off.

[gone fishing]

a izraelci su podigli nivo uzbuđenosti, nakon ove otmice, kada je njihov glavonja upitan zbog čega, reče kako oni imaju svoje satelite i satelite svojih saveznika, kako avion može preleteti njihovu teritoriju za 1:30 min, možda oni znaju nešto više

[Indy]

Još jedna ekskluziva™ iz neimenovanih izvora je demantovana:

Ja prestao da pratim zbog toga

[Roger Sanchez]

Avioni zaista tako izgledaju uslikani odozgor, nađe ih se sila na Google Earth imađriju, s tim da im je uvijek u blizini sjena. Ali to je nevažno.

[Muwan]

Ja prestao da pratim zbog toga

 

Prvih nedelju dana su bili potpuna katastrofa. U poslednjih par dana su Malezijci uspeli da uspostave kakav-takav zvaničan kurs istrage koji je konzistentan sa informacijama koje su proverene i potvrđene (okret na zapad, let do waypointa IGREX, odatle na sever ili jug, avion još uvek bio "živ" u 08:11am na jednoj tački duž Inmarsat koridora). Malezija je od vikenda naovamo uredno demantovala sve teorije, špekulacije i ekskluzive koje nisu uklopive u ovaj zvanični kurs (npr. one urođenike sa Maldiva koji su šatro videli avion u niskom letu). Iz podatka da je Tajlandu trebalo deset dana da potvrdi da je njegova vojska imala MH370 na radaru naslućuje se ne samo nivo opuštencije u regionu već i nivo (ne)saradnje između suseda. Juče sam pročitao da Indonezija još uvek nije izdala dozvole izviđačkim avionima iz spasilačke misije da preleću njenu teritoriju.

 

Ja sam "optimista", u smislu da verujem da će se nešto konkretno pojaviti na kraju. Ali javnost ne može da dobije instant odgovore koje želi, pa ih zato mediji izmišljaju. Seci me ako ne bih svim mogućim zakonima zabranio medijima da prenose bilo šta iza čega ne stoji neko sa imenom, prezimenom i funkcijom. Ovi neimenovani izvori su zlo. Ne samo u ovom slučaju nego inače.

Edited March 19, 2014 by beowl

[Muwan]

Inače, Kina je saopštila da je proverila svoje radarske zapise i da na njima nema MH370. Ako je ovo zvanično saopštenje onda se sa severnog kraka Inmarsat ose može precrtati Kina. Ostaju samo Kazahstan, Kirgistan, Uzbekistan i pola Indijskog okeana

[Roger Sanchez]

Burma?

[Muwan]

Može i Burma ali da bi tamo završio u 08:11am morao se prethodno 6 sati vrteti negde između waypointa IGREX i Burme. Ili leteti negde drugo pa se vraćati ka Burmi.

[MancMellow]

Može i Burma ali da bi tamo završio u 08:11am morao se prethodno 6 sati vrteti negde između waypointa IGREX i Burme. Ili leteti negde drugo pa se vraćati ka Burmi.

 

Osim ako nije sleteo mnogo pre toga, a motore imao upaljene ko zna zasto...wishful thinking, znam...

Edited March 19, 2014 by MancMellow

[Prospero]

-sa pprune-a, pojašnjava neke stvari
 

I am a 777 pilot and have waded painfully through all these pages.

Just a few points:

To be pedantic the 777 transponder cannot be turned off in flight from the flight deck. ie depowered with digits blank. There is no off switch, however there is a standy position which will stop it radiating. You would have to pull the circuit breaker to totally depower it. In flight on the 777 you never go to standby if you are given a change of squawk.

The suggestion of taking off with main tank fuel pumps off is not a valid possibility. The electronic checklist would not tick itself off, and there are clues on the eicas screen. If you did take off like that and the engines failed in cruise you would get low pressure fuel warnings first and your radios would still be working normally.

As to who made the last radio call. If the Captain is handling pilot the copilot would normally make the radio calls. However for various reasons i.e. the copilot out of the flight deck, copilot on the intercom to cabin crew , the Captain may have made the call. So role is not definitive proof.

In the event of a fire you do not climb to snuff out flames.

The 777 does not have a mach trimmer.

Can a 777 get to FL450? In true mythbuster spirit we put this to the test in a 777-2 simulator. A 777 with a full load of passengers has a zero fuel weight of between 170 and 180 tonnes, say 175 tonnes. 8 hours of fuel is approximately 52 tonnes. So a takeoff weight of approx 227 tonnes minus a bit of taxi fuel. At that weight the FMS says Max Alt FL409. The plane will climb easily to FL410.

Now it gets interesting. At FL410 There is a very small gap on the airspeed tape between the VMO and the yellow which is minimum manoeuvring speed. If you disconnect the autothrottle and firewall the thrust levers, then wait until the speed is about to trigger the VMO warning and then disconnect the autopilot and raise the nose you can do a zoom climb. Although into the yellow pretty quickly there is still a long way before you get to the red digits on the airspeed which is the point at which the stick shaker activates.. The elevator gets incredibly heavy as it is made artificially heavier as the Boeing 777 really doesn't want you to do this. With P2 pulling with all his might he still could not raise the nose to anywhere near 10 degrees. Putting the flight controls into direct mode made it easier. We got it to FL 443 at which point the stick shaker activated and P2 gratefully reduced the back pressure. This sim had GE engines. RR are a bit more powerful and if they had used an hour more fuel than our simulation I think it would have been feasible. Interestingly at FL440 the cabin alt was still at 8000 feet as per normal, so it must have used a higher diff than normal but still had not reached the max diff where the relief valve opens.

As regards the possibilities:

I believe the event probably started with the flight deck door opening and either a pilot exiting or someone else entering. I suspect someone with knowledge then deliberately disabled transponder, acars and satcom.

As for the gradual depressurisation theory. I cannot buy that because the normal cabin alt is 8000, if it gently depressurised it might not be noticed but at 10,000 feet cabin alt there is a very loud horn and red "cabin Alt" warning. No pilot should be unconscious by this point, the passenger masks don't even drop until a cabin altitude of 14000 feet so they would have seen the warning at 10,000 feet and taken action.

The rapid depressurisation theory and the pilots unconscious due to either failing to put masks on or failure of the oxygen system. This might have been a possibility except the transponder stopped radiating. In an emergency descent you do not touch the knob of the transponder switch. I have never put a 777 transponder to sby in flight and it would be totally alien. The transponder selector knob is not part of the emergency descent checklist.

A massive electrical failure or smoke in the flight deck? Possible but extremely unlikely for it to all happen at once with no chance to get even a radio call out. Also flying for 5 more hours. Would it not be better to head for land then circle and get attention?

A great mystery.

[Caligula]

.... o boze, greska

Edited March 19, 2014 by CowBoy

[Muwan]

Oglasila se Indonezija. Njihov radar na Acehu nije zabeležio MH370:

 

http://www.nst.com.my/latest/font-color-red-missing-mh370-font-no-signs-of-aircraft-detected-by-indonesian-military-radar-1.522270

 

Sad, i dalje postoji mogućnost da je zaobišao ovaj radar i provukao se izmedju Indonezije i Sri Lanke kako bi izbio na otvoreni okean.

[Roger Sanchez]

Sabang je otok koji je još sjevernije od Aceha, ako je obilazio bio je to široki luk.

 

Čudi me da još nema UFO teorija, ovo je svakim danom sve izvitoperenije..

[Otto Katz]

A Startlingly Simple Theory About the Missing Malaysia Airlines Jet

 

What I think happened is the flight crew was overcome by smoke and the plane continued on the heading, probably on George (autopilot), until it ran out of fuel or the fire destroyed the control surfaces and it crashed.