Archive > Real-world aviation
Cypriot \"HELIOS\" airliner crash in Greece
EHM-0005 Maarten:
--- Quote ---I'm wondering that if there was a decompression, then the windows should had frozen. Instead they were clear enough for the fighter pilots to see through...
--- End quote ---
I find it hard to say something about this. It all depends on the duration of the decompression at the time that the fighters arrived. The systems of an aircraft make the air more humid so that could have caused ice formation on the cabin windows. However, if this systems failed as well (it is part of the pressuration/airco system) then the humidity would be between 5 and 15%, so then you don't have ice formation on the cabin windows.
--- Quote ---What can make these pilots not to wear their maks then? 30 seconds are enough time for a trained pilot to start a descend and wear the mask. Because they were certainly informed about a possible malfunction from the annunciator panel...
Why they didn't even put 7500 7600????????? No communication at all!
--- End quote ---
Note that an emergency is an extreme stressful situation that can cause people to do things they shouldn't have done (or they omit to do something mandatory). It happened many times in the past that pilots did not don their mask at first, because they are still identifying the problem. In flight training, you'll notice that every instructor states that the first thing you have to do is to don your mask.
Saying something about the communications is very hard too. This accident will be evaluated in detail and a timeline of occurences will be made to get a better view on the situation. If the pilots had their masks on, they could communicate with ATC. Every quickdonning mask on the flightdeck is equiped with a radio headset.
I hope they didn't want to squawk 7500, because that would mean a hijack.
I have multiple situations in my head that could have happened, but a hijack situation is, in my opinion, not the case.
EHM-0005 Maarten:
The passenger that sent an SMS is mysterious for me too.
The sender of the SMS said that the pilot turned blue. So then why was this pilot not on the flightdeck? It could confirm the observation of the F16s. The fighterpilots reported that they had seen the co-pilot lying unconsiousness over the controls, but they didn't see the commander of the aircraft. At that moment, the aircraft could not have been at a high altitude, because the range of the GSM poles is limited (as stated before).
So let's say the pilots both turned blue then I can only think of 2 situations:
- Hypoxia (due to decompression)
- Poisonning (maybe due to bad oxygen or in the worst case: food)
In both cases, the pilots are incapable of doing anything. This brings me to my next point of questioning.
If the flight crew were incapable (turning blue due to hypoxia; poisonning) then why weren't the passengers incapable too? That guy was still able to send a SMS to his cousin!
A theory to this question could be:
The aircraft suffered a decompression and started its descent. Oxygen was supplied to both passengers and pilots (as I said, pilots have their own oxygen system). Then the problem could be in the oxygen system of the pilots: malfunction, corrosion inside the tank causing the oxygen to become toxic). There are no checks to observe the conditions of the oxygen tanks inside.
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Poisonning would mean that someone did something with the food on purpose, because commander and co-pilot have different meals to avoid poisonning of the whole flight crew.
EHM-1507 Manuel:
Somthing i absolutely don´t understand is the case:
That passenger must have been to the cockpit (cause he saw the skin colour of the pilots), must have gone back to his seat and sit down, turn on his mobile phone and write an SMS??
It´s hard for me to understand, that someone would do something like this in fear of his life.....
EHM-0005 Maarten:
That's probably not the case.
Most likely the commander of the aircraft was not in the cockpit (the fighterpilots observed that), but in the cabin (observed by the passenger who was sitting in his seat).
EHM-1366 Themis:
--- Quote ---
So let's say the pilots both turned blue then I can only think of 2 situations:
- Hypoxia (due to decompression)
- Poisonning (maybe due to bad oxygen or in the worst case: food)
--- End quote ---
That is exactly where I was heading to Maarten, poisonning of oxygen, or food.... It's the only situation where the pilots do not have time to react, otherwise some short of reaction whould had occured, even just push the controls forward to descend!
I stick on the issue that the passengers were just cold, not poisoned (as it occurs by now). At some time it seems that the captain opened the door and went to the passengers cabin, and then the poisoned air could bleed to the passengers too. But we don't have any clues that passengers were in any form poisoned.
That leaves to me only one option, that of food poisoning.
Also the plane doesn't seem to have crashed due to run out of fuel. The smoke from the fire at the crash site was black, which reveals the presence of fuel I suppose. But it may have not crashed itself either; The F16 pilots reported that at sometime they saw two people in the cockpit, presumably trying to take control of the plane. If this is the case, then we forget the air poisoning and we stay with the second assumption, that of food poisoning of the commander, co-pilot. ? ? ? ? ?
Could the two clockwise circles over LGAV be executed by autopilot or someone else tried to take control and land the airplane?
I'm realy astonished by the facts, it is one of the most weird accidents in the recent years
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