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-   -   Air Asia Indonesia Lost Contact from Surabaya to Singapore (https://www.pprune.org/rumours-news/553569-air-asia-indonesia-lost-contact-surabaya-singapore.html)

fireflybob 2nd Jan 2015 14:40


In defense of the pilots, who are unable to defend themselves, all required up to date WX may have been downloaded on ACARS. This of course would be able to be verified. What about Volmet?
Sop_Monkey, can you get a Sig Wx/Radar Images on ACARS?

When you say Volmet would that be HF as VHF Volmet only transmit METARs as far as I am aware?

Sop_Monkey 2nd Jan 2015 14:49

Bob

On the aircraft I last flew IIRC, you could download the latest accessible satellite view on a separate monitor. We were able to download almost everything else worth noting on the acars, of course. Notams, WX, company comms, flight plans etc. (no not a complete WX package)

Volment HF, tafs, Metars and SIG met.

"Sig Wx/Radar Images"? I used the WX radar for that.

In some of the areas, remote or not, you arrived at briefing to the tune of teleprinters rattling away with no paper and the "operators" asleep. That is when alternate means came in handy.

SAMPUBLIUS 2nd Jan 2015 15:03

re wehaka #978 and wood
 
its NOT wood my friend- its typical unpainted "honeycomb" - " fiberglass based " interior panels viewed from the backside.

bille1319 2nd Jan 2015 15:08

Originally Posted by Suastiastu View Post
"It might be useful ..."
Maybe useful to you and a sense of curiosity shared by tabloids- but not to families who want to bury their dead, preferably in tact.Apparantly 41 souls who perished were members of Surabaya's Mawar Sharon Church according to their Pastor and were travelling to Singapore on holiday. I don't know whether it is Pentecostal or Presbyterian but 1/4 of all aboard; what a heart breaking tragedy?

The Ancient Geek 2nd Jan 2015 15:39


However, recovery from a stall requires:

1. reduce AoA, and
2. regain airspeed

Training emphasis has recently shifted towards the first, and I miss that in his post.
Adding power to regain airspeed is NOT the way to recover from a stall.
Underwing engines will create a pitch up force when power is added so it is essential to get the nose down FIRST before making matters worse by adding power.
Once the wing has been unloaded and the AoA is correct power can be added carefully to regain speed or minimise loss of altitude.

fireflybob 2nd Jan 2015 15:50


it is essential to get the nose down FIRST
What if the nose is already down? (A/c can stall in any attitude and airspeed).

Better to say "move the control column (or sidestick) centrally forward until the stall identification ceases" - then recover from the resultant unusual attitude.

Ian W 2nd Jan 2015 15:59


Originally Posted by Jet Jockey A4 (Post 8807207)
Sorry for the slight detour off thread but since they brought up the subject of Baro Altitude versus GPS Altitude I'm curious...

Besides the fact the Earth is not perfectly round thus rendering wrong GPS altitudes information (now taken care of by software adjustments), isn't one of the major problems for using GPS altitude the fact that we fly a constant pressure wave/altitude as we set 29.92/1013 on our altimeters and this pressure wave is not at a constant altitude above the Earth's surface?

When I look at our GPS altitude in our FMS, sometimes it is 1000 feet if not more off the Baro altitude and sometimes it is really close but I have never seen them match each other.

Could/can they even have a solution to solve this problem?

Also since aircraft performance is based on a "standard pressure" and if we now decide to switch to GPS altitude and now fly a "true" altitude above the Earth's surface how would that affect the aircraft's performance because now instead of being at a constant FL410 pressure altitude you might be at a 42,300 feet altitude?

The answer is that everyone has to fly using the same datum. (Posted earlier) So either everyone flies on GPS altitude or on a pressure datum altitude. For engines pressure is important as is temperature with temperature sometimes having more impact. As I posted earlier as you follow the pressure level you will descend and climb along that pressure level. This is an issue that is in the 'too difficult' pile at the moment but will eventually have to be approached as satellite based systems become more ubiquitous and reliable. The question will be which of the systems is more efficient from a fuel burn point of view and which is the safest. A brief read of the NASA ASRS (confidential reporting system) is frightening for the number of altimeter setting errors. If the decision was to be made without all existing grandfathered in altimetry equipment and procedures, nobody would ever suggest using barometers (altimeters) with multiple datum changes for measuring aircraft altitude.

Frequent_Flyer 2nd Jan 2015 16:07

Can Aviation Medicine give clues?
 
Hello there,
I'm a flight attendant so I hope you do not mind me posting and asking the following which came to my mind:
-One of the people 'fished out' of the sea was a flight attendant.
-She seems to have ben burried at the speed of light.
Question: Why is there no information on an autopsy on her or other PAX?
Afterall, an autopsy can probably give vital clues to this incident. For example, hypoxia, level of stress an fear, certain organ damage can be examined and provide clues to whether there was discompression, whether people had time to get scared etc. Just like autopsys would be performed with any incident on ground where people have died and a criminal investigation in neccessary.
I'm curious to hear your thoughts ladies and gents!

Evey_Hammond 2nd Jan 2015 16:17

I also have the same question as Frequent_Flyer and equally with no morbid curiosity. One thing that would be determined in an autopsy is whether there is water in the lungs of the deceased which would end speculation regarding whether the person was alive or dead when the plane hit the water.

ACLS65 2nd Jan 2015 16:24

There is a whole host of information that can be gathered about the crash from the autopsies of the victims. The details are pretty morbid, but the information could be critical.

Though it tends to become news fodder it is really a key part of the investigation. See the link below regarding AA587 as an example of the information gained.

Victim Fragmentation Patterns and Seat Location Supplements Crash Data: American Airlines Flight 587 | Amy Mundorff - Academia.edu

Livesinafield 2nd Jan 2015 16:28


I also have the same question as Frequent_Flyer and equally with no morbid curiosity. One thing that would be determined in an autopsy is whether there is water in the lungs of the deceased which would end speculation regarding whether the person was alive or dead when the plane hit the water.
If the bodies have been submerged for a few days then everything will be full of water regardless of whether they are breathing at the time or not

deadheader 2nd Jan 2015 16:30

Missing clues or confident of cause?
 
"Doctors have said they are not attempting to establish a cause of death. Their focus is on identifying victims quickly and returning them to their families".

AirAsia flight QZ8501: 30 bodies recovered after six days of searching

Organfreak 2nd Jan 2015 16:31

Condition of Bodies
 
Deepest apologies if this has already been said; I am two pages behind in catching up here:


Also - and echoing an earlier post - no information has come out about the cause of death identified in the bodies brought back to shore. Distressing as it is to the families, the condition of the bodies may be an important clue as to what happened to the plane.
I can't speak with any authority whatsoever, since I can't fly (and that's a good thing), but the fact that the bodies recovered so far are, apparently, relatively intact, gives the lie to the preposterous speculation that the airplane was pointed straight down at impact. Wouldn't we have nothing left but small fragments in case of a high-velocity impact?

By the same token, if there had been a "water landing," you'd likely expect some death by drowning autopsy results. :ooh:

Bobman84 2nd Jan 2015 16:34


Originally Posted by deadheader
"Doctors have said they are not attempting to establish a cause of death. Their focus is on identifying victims quickly and returning them to their families".

Can understand the need to return the victims' bodies to their families, but not investigating the cause of death is a pity as it helps understand the final events a little better and if anyone suffered.

jcjeant 2nd Jan 2015 16:35


Frequent FlyerQuestion:
Why is there no information on an autopsy on her or other PAX?
Afterall, an autopsy can probably give vital clues to this incident. For example, hypoxia, level of stress an fear, certain organ damage can be examined and provide clues to whether there was discompression, whether people had time to get scared etc. Just like autopsys would be performed with any incident on ground where people have died and a criminal investigation in neccessary.
I'm curious to hear your thoughts ladies and gents! Thanx.
Will be released in due time and certainly a summary (as usual) in the final investigation report
Note that the general public is not a partie of the criminal investigation .. as usual

langleybaston 2nd Jan 2015 16:35

If the accident were, for example, under British jurisdiction surely autopsies would be deemed essential, regardless of religious sensitivities?

Leightman 957 2nd Jan 2015 16:42

Debris
 
Not many pics of debris yet. This appears to be another view of same debris as in earlier posts here. Some readers may recognize pieces and, more importantly, call attention to details that suggest the type of forces involved in the ac coming apart.
BBC News - AirAsia QZ8501: Search for plane focuses on seabed
http://news.bbcimg.co.uk/media/image...31f49c8f64.jpg

oldoberon 2nd Jan 2015 16:44

Surely any/all religious practices/requirements/preferences/rites etc should be secondary to the legal requirements of a crash investigation, after all some crashes are crime scenes.

SAMPUBLIUS, yep it's not wood, as you say fibreglass panels. From A320?, the hose appears to be an air feed or extraction for filtration.

londonman 2nd Jan 2015 16:48

Unfortunately, with some religions they override any concept of what we in the West might expect in our culture with respect to establishing cause of death, crash investigation.

DrPhillipa 2nd Jan 2015 16:59

Indonesia is constitutionally a secular state. It also seems that these flights actually serve a large proportion of ethnic chinese Christians.


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