PPRuNe Forums

PPRuNe Forums (https://www.pprune.org/)
-   Rumours & News (https://www.pprune.org/rumours-news-13/)
-   -   Russian B737 Crash at Kazan. (https://www.pprune.org/rumours-news/527997-russian-b737-crash-kazan.html)

Karel_x 14th Dec 2013 08:44


It is co-signed by 16 members of Duma:
How many members has The Gosduma? Nearly 500? You can find a similar naive initiatives in any parliament on the world.


I don't want to stray too far off-topic.
I agree, it is mostly an emotion sphere and there are lot of other places to discuss it.

Sergey Tachenov 14th Dec 2013 08:59


Originally Posted by hamster3null (Post 8204843)
The central "metaproblem" is the persistent assumption of uniqueness, one might even call it a quest for the uniquely Russian way of doing things.

I'll have to partly disagree with that. The problem is not that Russia tries to be unique. The problem is that it IS unique, but instead of taking some western practice and adapting it to Russian reality, the decision-making idiots often just come up with random 'solutions' that don't have anything to do with neither western practices nor with common sense.

The idea to ban 20+ years old planes is a good example. It is stupid, it won't work, and it isn't the way it works in the West. But! If you just take some western practice verbatim, it usually doesn't work in Russia as well.

For example, these days smoking is prohibited in many countries in many places. Which is not just a good thing, but an absolutely wonderful thing IMO, just about the same level as that you can't just hit people on their heads with something heavy. Now how it works in Russia? They recently adopted a low to prohibit smoking in many public places. Very similar law to those in western countries. OK, so does it work? NO. Why? Because it's common sense in Russia to just ignore any (and I mean any!) law. In fact, the ONLY thing that law actually did was that they dismantled smoking rooms in airports so people started to smoke in airport toilets instead.

ICAO expert was speaking about standards and documents, which is pretty much expected from an ICAO expert. This is all fine, but even if we formally adopt all those standards and documents I'm afraid nobody will care to actually obey them. There are just too many things terribly broken here, like laws, courts, prosecutor offices, police etc. Now if people die in an aviation accident, some people may loose their jobs because of it. If they go to jail instead, and not only if people actually die, but even if they just intentionally break the aviation safety laws, then it might actually work. But Duma is preoccupied with stupid ideas like prohibiting 20+ year old planes or letting the foreign pilots work here instead.

ATC Watcher 14th Dec 2013 10:02

If you want to produce a valid argument against this stupid 20 or 15 years old aircraftt ban , just use the ICAO statistics: today the region with the oldest fleet in the world is North America, and the region with the youngest fleet is South America, compare the incdents and accidents rates of the both regions.

Also if you take hull losses per million departures, The Russian the good old Tu154 had a much better ratio than the Boeing 737, not to mention MD11s or FK28s. Safety is a bit more complicated than the age of the aircraft.

porterhouse 14th Dec 2013 16:51


The Russian the good old Tu154 had a much better ratio than the Boeing 737, not to mention MD11s or FK28s.
Completely false.
The number of hull loses as a percentage of total aircraft produced is about 6.9% for Tu-154 and 6.7% for DC-10 and only about 2% for 737. So just by this statistics Tu-154 is much worse than 737 and even worse than DC-10. Of course the real utilization rate of Tu-154 (its life span was also much shorter) was much lower than in western fleet hence its true accident rate per departure would be even worse when compared to 737.

ATC Watcher 14th Dec 2013 17:43

Porterhouse, I think you read my post too fast.
I am quoting hulls losses per million departures, which is the common standard used by people involved in safety. Never heard of percentage of hull losses per aircraft manufactured.
These are the figures commonly used :
Hull loss with fatalities (*) per million departures .
For same generation aircraft :
B727 : 0,72
DC9 0,78
T154M :0,80
B737/200 : 0,89
DC10 : 1,31
MD11:2.10
FK28 :2.35
if you want to go to the previous generation :
DC8 : 4.0
B707/720 :4,27

(*) without fatalities the rate varies but proportionally. Of course older types ( like for instance B747-100 and 200 ) get today bad stats as they do not get repaired because of they low residual value. The same apply I guess for Tu154s today. Therefore the total hull loss is not really useful for safety , especially for older types.

porterhouse 14th Dec 2013 17:43


Using hull losses to compare safety of aircraft types is a completely misleading
True but sometimes you don't have anything else. The best aircraft accident statistics specifically exclude aircraft made in CIS/USSR because of lack of operational data. So you can take hull losses which are available and adjust for utilization which was always particularly low in CIS/USSR.


I am quoting hulls losses per million departures
I claim that whatever departures you are using for Tu-154 is a totally unreliable number.

ATC Watcher 14th Dec 2013 17:57

Porterhouse :

I claim that whatever departures you are using for Tu-154 is a totally unreliable number.
Possibly, but they are coming from MAK. Tupolev, contrary to Boeing or Airbus do nor provide verifyable figures, you are right, especially today. . But in the days of Soviet Aeroflot, calculations were easy to verify and in those days the Tu 154M had a quite good safety record.

GobonaStick :

Using hull losses to compare safety of aircraft types is a completely misleading and totally irrelevant sport that I wouldn't expect to find on any forum claiming to be populated by professionals.
Well, we obviously have a different definition of what is a professional .No need to denigrate people, especially when you do not know .

porterhouse 14th Dec 2013 18:02


But in the days of Soviet Aeroflot, calculations were easy to verify and in those days the Tu 154M had a quite good safety record.
I would argue just the opposite - nobody could easily verify data from that period of history since record keeping was either very shoddy or skewed by political considerations therefore what today is regarded as the gold-standard accident statistics report simply ignores it.

JamesGBC 14th Dec 2013 18:47

Agree to work in Russia?
 
A- Head of the pilot union (Miroslav Boychuk): We shouldn't accept foreign captains because only the worst of them will actually agree to work in Russia.

B- Head of the pilot union: There is no actual lack of pilots in Russia. There are more pilots being trained than required by Russian airlines.

A is a very good point.

Then go to B,what makes the good ones agree to stay in Russia?

porterhouse 14th Dec 2013 18:58


A is a very good point.
Perhaps, but is a bit humorous at the same time.
If they pay decent world-wages I bet quite a few 'good' pilots would agree to work for them. But without need to push any new laws about foreign pilots working in Russia I don't hear the obvious - send all these 'suspect' pilots from regional airlines to very reputable foreign training facilities, say FlightSafety Int., validate their competency and retrain to FlightSafety standards if necessary. How many of them would even pass a rigorous simulator check ride at FlightSafety?

hamster3null 14th Dec 2013 21:30


These are the figures commonly used :
Hull loss with fatalities (*) per million departures .
For same generation aircraft :
B727 : 0,72
DC9 0,78
T154M :0,80
aviation-safety.net reports 17 hull losses with fatalities for Tu-154M. Wikipedia reports that 320 of those have been built. The rate of 0.8 per million departures would then translate into an average of 66,000 departures (flight cycles) for each of the 320 aircraft, which seems about 5x high for a long-range aircraft that only entered mass production in 1984.


in the days of Soviet Aeroflot, calculations were easy to verify and in those days the Tu 154M had a quite good safety record.
Tu-154M barely had a chance to fly in the days of Soviet Aeroflot. It was in production for 7 years by the time of the fall of the USSR. The first recorded hull loss of the 154M is dated 1990.

The regular 154 came out earlier (1973) and it had 17 fatal accidents between 1973 and 1991, probably with no more than 300 aircraft in operation at any point (too lazy to look for production stats now), which would also point to a pretty high fatal loss rate per departure.

P.S. Aviation-safety.net gives flight cycle numbers for some of the crashed 154M's and it looks like they pretty consistently average ~700 departures/year.
If we assume that the average Tu-154M is 23 years old (manufactured in 1990) and all remaining aircraft are still in regular service, we get 5 million departures and the hull loss rate of 3.4 per million.

Sergey Tachenov 15th Dec 2013 05:16


Originally Posted by porterhouse (Post 8206603)
If they pay decent world-wages I bet quite a few 'good' pilots would agree to work for them.

Two problems. One is that only biggest carriers pay good wages, but then again they already have good enough pilots. No fatal accidents at all for Transaero with huge number of flights, for example. The small carriers such as Tatarstan probably won't be able to afford good foreign pilots.

Another problem is that with all that crazy stuff going around in Russia, it would be pretty hard for a foreigner to work for a Russian airline. So they will have to pay more than an average worldwide good salary to get them to work in these conditions. Pilots will have a hard time fighting Russian mentality and trying to 'blend in' so to speak.

ATC Watcher 15th Dec 2013 09:16

Hamster3null " impressive calculations/deductions , thanks for taking the time. . I just took my figures from MAK ( and Boeing) papers presented a year or so back. But as we all know political considerations often enter statistics in Russia ! I will keep a copy of your post and use it to ask some questions next time I meet them!

up_down_n_out 15th Dec 2013 16:36

These TU154 figures are complete nonsense, and some people really have to get their facts right.

"The regular 154 came out earlier (1973) and it had 17 fatal accidents** between 1973 and 1991, probably with no more than 300 aircraft in operation at any point,- which would also point to a pretty high fatal loss rate per departure."

TU154 and variants started flying roughly the same time as Concorde and was still in production in 2009.

first hull loss:-
1973 Prague.

**I can think of 2/3 that got shot down, another couple that the pilot turned the fuel pumps off, while taking off, another one that caught fire about a year ago because of a short circuit, and another one that flew straight into a thunderstorm, and yet another downed by a terrorist, never mind the 2 they set burnt to cinders, refuelling next to each other!

I'm told one of the fatalities was down to putting one of these birds down at 5g+ and some poor chap having a heart attack. (Dagestan avia 372)

About 95% of all the other incidents were down to pilot error on what has now become one of the most rugged & reliable classic workhorses still flying.

RA-85684 actually saved the entire passengers and crew thanks to being built like the proverbial brick house lavatory.

At this rate someone is gonna start the rumour mill about the Polish president thread all over again too.

Nothing has anything to do with the safety record or even the age of the aircraft, or are we going to start suggesting Lockerbie is an everyday event too?

DaveReidUK 15th Dec 2013 17:13


never mind the 2 they set burnt to cinders, refuelling next to each other
Hull losses, with fatalities ?

porterhouse 15th Dec 2013 18:01


About 95% of all the other incidents were down to pilot error
So it the case with other aircraft types.
I suggest you grasp a simple fact - we are comparing Tu-154 numbers with those of other aircraft types not analyzing a cause of every single accident. Such comparison does make sense because it is done routinely in aircraft accident statistics. if you want you can sift through every single accident for Tu-154 and do the same for 737 and eliminate every single one where pilot error was involved but nobody does it - makes no sense because it is going o be a wash and you end up as if you were comparing raw numbers without all this work.

hamster3null 15th Dec 2013 18:04


These TU154 figures are complete nonsense, and some people really have to get their facts right.

"The regular 154 came out earlier (1973) and it had 17 fatal accidents** between 1973 and 1991, probably with no more than 300 aircraft in operation at any point,- which would also point to a pretty high fatal loss rate per departure."

TU154 and variants started flying roughly the same time as Concorde and was still in production in 2009.
I stand corrected on one point: it flew in 1972, not 1973. I said "between 1973 and 1991" because the discussion above was in regard to Soviet era.

Most crashes are caused at least partially by the human factor. It's best to compare all crashes vs. all crashes. Or at least to exclude terrorist attacks only. If we get the hull loss rate of Soviet-era 154 that is several times higher than all-time hull loss rate of B737 (including all the losses in places like Indonesia, which seems to have become a veritable B737 graveyard recently), either the machine is poorly built, or its pilots and mechanics are poorly trained, or it's some combination of these, and it's really not my objective to assign blame here.

Karel_x 15th Dec 2013 18:46

According to
Accident Database: By Manufacturer/Type > TU-154
There was only 11 air disasters with fatalities between years 1973 -1991. It may be not complete list.

First Prague disaster - not determined the cause, second Beirut - not determined too, it is still mysterious, maybe it was shot down. Nacias Nguema - not determined, Al Bayda - lack of fuel after divert....

According to
? russianplanes.net ? ???? ???????
there was 759 Tu-154 flying in 1991

Skyjob 15th Dec 2013 20:07

Wikipedia

hamster3null 15th Dec 2013 22:11


According to
Accident Database: By Manufacturer/Type > TU-154
There was only 11 air disasters with fatalities between years 1973 -1991. It may be not complete list.

First Prague disaster - not determined the cause, second Beirut - not determined too, it is still mysterious, maybe it was shot down. Nacias Nguema - not determined, Al Bayda - lack of fuel after divert....

According to
? russianplanes.net ? ???? ???????
there was 759 Tu-154 flying in 1991
This list does not have:
SU-AXB (1974, Egypt, training flight, 6 fatalities)
LZ-BTB (1978, Syria, 4 fatalities)
CCCP-85169 (1978, central Russia, 4 fatalities)
YR-TPH (1980, Mauritania, 1 fatality)
CCCP-85413 (1988, Russia, 8 fatalities) - OK, this one was a hijacking so let's drop this one
YR-TPJ (1989, Romania, 5 fatalities)

Good source for production numbers. By 1991 596 Tu-154's were completed, not counting M's and pre-production frames. (I seriously underestimated the degree to which aircraft production went off the cliff after 1991.) Assuming that all of those survived to 1991, I see about 7700 aircraft-years of operations (e.g. 11 aircraft made in 1971 * 20 years from 1971 to 1991 = 220 aircraft-years, etc.) At 700 departures/year, that's 5.4 million departures and 3 losses per million departures.

For M's, it says that more than 80% of Tu-154M were manufactured between 1986 and 1993, so my previous estimate stands. This family only accumulated about 500 aircraft-years by 1991, so the expected number of fatal accidents in this family by 1991 at 3 losses / million departures was only ~1.


All times are GMT. The time now is 15:55.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.