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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)

bud leon 3rd Jan 2015 03:03

Yes, a return to western imperialism is definitely called for. :ugh:

Propduffer 3rd Jan 2015 03:26

You would think that the guy would get seat of the pants flying credit for his F-5 time. They are about as automated as a Volkswagen beetle.

And all his flying time was on or near the ITCZ so he couldn't have been a neophyte where it comes to weather.

I have had no hesitation pointing a finger at Zaharie, but this guy had all the makings of a good pilot AFIK.

FLEXPWR 3rd Jan 2015 03:39

Bud leon, this has nothing to do with imperialism.

This is a hard reality. Flying in Asia for many years now, I cannot disagree with caulfield views and observations. Of course it may or may not be relevant to Air Asia's current misfortune.

I fly with first officers who are ready to upgrade to captain, and have NEVER flown the A320 without ATHR. NEVER flown with FD's OFF. NEVER opened a book about aviation since they got their CPL, except the simulator syllabus for a 6 month check. Only when fully established on the ILS will SOME disconnect the autopilot before the minimums or 500 feet.

When you ask some basic questions like how TAS can be estimated, the answer is "look at FMS distance remaining and divide by the flight time to destination". No joke.

The laws of physics and aerodynamics are not to change, but over the years, beancounters et al. have sold to a wide audience that with today's technologically advanced aircraft, all you need at the pointy end is a couple of guys pushing buttons to keep all flight parameters in check. Nothing could be more wrong. This includes how the wx radar is used. This includes, unfortunately, how decision making is integrated, or not, in today's airline culture.

I do hope the above-mentioned aspects will not be found to be a contributing factor in the demise of this aircraft. But it is a possibility.

Airbubba 3rd Jan 2015 03:41


Ive seen it all and its a long list of woe believe me including:
Thanks for sharing this list. I've seen much of that in my expat days, the folks back in the U.S. think you are making stuff up if you tell them about it.

Unfortunately, I'm starting to see some of the same trends in the U.S. lately.

To add to the weather discussion, this article from the Malaysian Star tabloid:


Updated: Saturday January 3, 2015 MYT 11:10:53 AM

AirAsia QZ8501: Ice likely culprit in crash

SINGAPORE: Extreme bad weather triggered last Sunday's crash of AirAsia Flight QZ8501, Indonesia's weather officials said Friday, as Russia became the latest nation to get involved in the search effort for the doomed jetliner.

The 14-page "meteorological analysis" is the first official word from Jakarta on the reasons for the crash and comes close to confirming widespread speculation on the reasons for the disaster.

"The most probable weather phenomenon is that icing caused the plane engines to be damaged," said the report by Indonesia's Meteorology, Climatology and Geophysics Agency (BMKG).

"This is however just one analysis of what likely happened based on available meteorological data, and is not the final determination on the cause of the incident."

BMKG's report, authored by Professor Edvin Aldrian, head of its research and development unit, came as high waves impeded divers from entering the sea.

...BMKG said its preliminary analysis of weather data suggested the AirAsia Airbus A320-200 had flown into storm clouds. It also noted that weather charts issued before the flight showed the plane's scheduled route at cruising level would come across "worrying" conditions, with warnings of a gale. Satellite images also suggested peak temperatures of -80 to -85 deg C, which meant there were grains of ice in the dense clouds, the report added.
AirAsia QZ8501: Ice likely culprit in crash - Nation | The Star Online

The BMKG report, written in Indonesian, is here:

http://data.bmkg.go.id/share/Gambar_...TEOROLOGIS.pdf

SAMPUBLIUS 3rd Jan 2015 03:45

FWIW re finding plane pieces
 
REPORTING FROM SINGAPORE [Times are in GMT+8, unless specified]
THE LATEST

10:53AM: Main wreckage of plane has been located, says Indonesia's search and rescue agency. Two large objects roughly 30 metres under the sea have been spotted near oil spills in the area near Pangkalan Bun.

Leightman 957 3rd Jan 2015 04:33

Not so huge
 
Hardly "main" debris, but makes a nice headline.

"The first object measured 9.4 meters by 4.8 meters by 0.4 meters (30 feet by 15 feet by 1.3 feet), while the second is 7.2 meters by 0.5 meters (24 feet by 1.6 feet), he said.

https://ca.news.yahoo.com/indonesia-...--finance.html

Suastiastu 3rd Jan 2015 04:54

bean counting
 
"over the years, beancounters et al. have sold to a wide audience that with today's technologically advanced aircraft, all you need at the pointy end is a couple of guys pushing buttons"


Not sure that this is a purely Asian or African idea. What Asia has is a very rapid expansion in aviation, so modern techniques are more prevalent. Air Asia has flown more than 220 million PAX and not lost one before. The way to determine if the bean counters are right is to look at the stats.

Richard C 3rd Jan 2015 05:20

""The most probable weather phenomenon is that icing caused the plane engines to be damaged," said the report by Indonesia's Meteorology, Climatology and Geophysics Agency (BMKG)."


Engine icing doesn't explain why the aircraft made no radio calls and why it travelled only 10km from a height of 36000 ft.

ipsatex 3rd Jan 2015 05:20

Erroneous overspeed warning, pilot induced climb, stall ....?

Richard C 3rd Jan 2015 05:37

"Erroneous overspeed warning, pilot induced climb, stall ....? ":

Yes, instrumentation icing does explain the observed facts a lot better.

But the last word, of course, will be from the air safety investigators, not meteorologists.

catterwell 3rd Jan 2015 05:45

About 10 km horizontal from 36,000 feet implies a descent angle of about 45 degrees. If wind accounted for some of this angle, that's quite a fall.

Ranger One 3rd Jan 2015 05:59

Airbubba, that's interesting.

Hard factual information will mostly have to wait for wreckage and especially FDR/CVR recovery of course, and much speculation before then is bootless and to me somewhat distasteful when done in public - but I've been keeping my eyes open for a proper formal met. aftercast; that should be available *now*.

What, exactly, were the conditions at the precise time and place they lost contact...

Ollie Onion 3rd Jan 2015 06:14

So they are flying along, encounter some pretty bad weather and request deviations to avoid. Pitots ice up and give erroneous indications leading to the PF inducing a 1.6g pull up resulting in a 10,000 ft/min climb and speed quickly reducing down to below stall speed. Aircraft ends up with 16 degree pitch up / 40 degree angle of attach / 60kt groundspeed and 11,000 ft / minute descent.

Total confusion on the flight deck as when the G/S drops below 60 kts the aural stall warnings stop as the angle of attack information is unreliable below this speed leading to 'reversed' indications i.e. push nose down and speed increases and 'STALL STALL' warning starts, pull back and reduce power and 'STALL STALL' warning stops.

Aircraft impacts the ocean with very little forward speed, a high rate of descent and a very high pitch.

No mayday call due to the very busy confused cockpit workload, not much left on the surface as the aircraft impacted in one piece at slow speed.

Oh oops, I have summarised the Air France 447 crash. :suspect: I hope this is not the case, it would be a real shame for those lessons to have not been learned.

oldchina 3rd Jan 2015 06:24

Leightman
 
"The first object measured 9.4 meters by 4.8 meters by 0.4 meters (30 feet by 15 feet by 1.3 feet), while the second is 7.2 meters by 0.5 meters (24 feet by 1.6 feet), he said".

Those objects are pretty large by A320 standards. Both are bigger than the vertical stabiliser (approx. 5.9m).

mikedreamer787 3rd Jan 2015 06:34


Erroneous overspeed warning, pilot induced climb, stall ....?
Or EXPED button pushed above F250 in concert with TAI non-activation/failure?

Or Erroneous Alpha Prot activation (AB AD 2014-0266-E)?

Point is there's no use speculating any of this until at least the preliminary investigation has been completed.

Nemrytter 3rd Jan 2015 06:52


To add to the weather discussion, this article from the Malaysian Star tabloid:
...
The BMKG report, written in Indonesian, is here:
http://data.bmkg.go.id/share/Gambar_...TEOROLOGIS.pdf
Most of their "analysis" seems to have been taken directly from the website of an American University, much of the rest is from forecasts that, as it turned out, weren't particularly good.

bud leon 3rd Jan 2015 07:03

FLEXPWR, I don't doubt your observations. I'm very selective about which airlines I travel on in Asia. I don't doubt that there are many risks to quality in many parts of the world right now. What bothers me is that there is no reliable properly analysed evidence of cause in this incident but people have already arrived at a conclusion which clearly reinforces racial and cultural biases. Even referring to the region as the "Far East" sends a culturally biased message.

There is no doubt safety standards in Asia in many industries fall behind the west. That is a recognised development issue. There has to be some recognition that these are developing economies and standards also are developing. There is also no doubt that western safety standards are under increasing pressure. Whether there is a significant regional difference in aviation safety requires more than anecdotal evidence. This region, and aviation generally, are in a period of significant flux.

The statistical reality is that revenue passenger kilometres are increasing almost exponentially at over 5.4 trillion kilometres per year (doubled in ten years) and a lot of that increase is in Asia. Yet global airline crashes continue to fall.

Anecdotally there is equally sufficient information to suggest lapse standards in other countries… a quick look at this forum reveals pilots accomplishing hands free nose first landings into the runway, taxiing a plane to the gate on smoking rims, undershooting runways by 500 metres, landing at the wrong airport, landing on taxi-ways, stalling airbuses, the list could go on. I can't help think there are some cognitive biases at work here. Maybe there is a difference in standards, maybe the difference isn't as big as people imagine.

silverstrata 3rd Jan 2015 07:14


Midland 63:

What always surprises me reading these threads is the amount of disagreement among the pro's about topics which I would have thought were quite basic such as stall recovery.
Most of these guys commenting are wannabee's not pros, and you cannot take C152 experience and apply it to jets. Having said that, there are some pros out there who could do with a 20-hour refresher in a glider or puddle-jumper, because they have forgotten basic stick-and-rudder skills. (Because they are actively discouraged in some airlines - an old debate that has been aired many times here.)

Another problem is that the extremes of the flight envelope are often not explored in the sim, because you are not supposed to be at those extremes. So it would come as a surprise to many, if you did enter those forbidden areas.

An example of this, that few have explored in the sim, is a stall recovery at very low speeds and high power settings, which creates a thrust induced pitch-up (which is why you are supposed to reduce power in the stall). Reducing thrust in the stall is not a puddle-jumper technique, but is a must on jets with under-slung engines.

You will see from this example that even though the captain applied full stick forward very quickly, the pitch rose up to 44 degrees. (This is a real flight, with pax on board.)


http://oi61.tinypic.com/15zpijm.jpg


There was probably a big 'thinks bubble' on the flightdeck, because the aircraft 'should not be doing that'. But it will, and it is a corner of the flight envelope that is rarely explored in training. So I will throw this out there to the pros - how many of you have actually practiced this scenario in the sim? Anyone? Would Air France have taught this in the sim? Or was it all dual autopilot all the way stuff?

The only thing that stopped this aircraft doing a low-level back-flip, was the wing dropping - thus reducing the vertical component of the thrust and allowing the nose to drop. Then, the captain was back in 'normal territory', and was able to recover very professionally in the normal manner.

bud leon 3rd Jan 2015 07:41


"Even referring to the region as the "Far East" sends a culturally biased message".

What the fook are you talking about? From where I live it's always been the Far East. I must go check my school atlas."
Exactly. From where you live. From the centre of the 21st century world point of view it's you who lives in the "Far West", actually. It's a 12th century term that evokes the exotic and culturally separate.

Metro man 3rd Jan 2015 07:51

If an A320 pilot really wants to he can simply switch off flight control computers until the aircraft goes into DIRECT LAW. In this case he would lose all protections.

Why is beyond me as there no advantage in being able to over stress the airframe.

No single computer failure will down grade the control laws it has to be multiple, and often a simple reset will restore normality.

There is a control mode which recognises an upset and will allow manoeuvres necessary to regain control which would normally be prevented.


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