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-   -   B737MAX Recertification - Archive (https://www.flyertalk.com/forum/united-airlines-mileageplus/2031779-b737max-recertification-archive.html)

txhyattlvr Mar 11, 2019 1:50 pm


Originally Posted by cerealmarketer (Post 30874163)
Witness accounts I was wondering about

https://www.reuters.com/article/us-e...-idUSKBN1QS1LJ

Smoke and debris trailing, making a turn then diving

A possibility is bird strike damaging one or both engines, them stalling on that turn

More facts to come from the professionals

If that had happened there'd be a debris trail. None has been reported.

Yellowjj Mar 11, 2019 2:05 pm


Originally Posted by Aussienarelle (Post 30872388)
I found the response (#2 in the thread) from [MENTION=574963]cmd320[/MENTION] far more helpful than your comment. I obviously did not know the answer else I would not have posted the question. I learn news things in FT all the time.

My post wasn't in bad intent. I assumed most elites posting on these forums on a regular basis, would know the general fleet makeup of their respective FFP; especially as it relates to their odds of upgrade chances with the ratio of F seats. Notwithstanding that, there were quite a few posts talking about the Max, to which you even replied to one.

However like I said my intent wasn't bad, I was merely surprised. Apologies if you thought otherwise.

milypan Mar 11, 2019 2:19 pm


Originally Posted by LarryJ (Post 30871584)
By whom? You can't establish anything without applicable data.

The data are publicly available. If the MAX had the same safety profile as the 737NG and A320, the probability that it would have had two 100% fatal hull losses this early in its service life is less than 1 in 1,000. To me, those aren't good odds, but I can't speak to your own risk preferences or priors.

Repooc17 Mar 11, 2019 2:46 pm


Originally Posted by milypan (Post 30874389)
The data are publicly available. If the MAX had the same safety profile as the 737NG and A320, the probability that it would have had two 100% fatal hull losses this early in its service life is less than 1 in 1,000. To me, those aren't good odds, but I can't speak to your own risk preferences or priors.

Investigation is still ongoing for JT610, and just underway for ET302. Let's have the pros continue doing their jobs.

In no way is the above dismissal of potential inherent flaws with the aircraft series. It could be one or more factors which contributed to the tragic loss of both planes. RIP.

LIH Mar 11, 2019 2:48 pm


Originally Posted by lhrsfo (Post 30872766)
Not gone, unless you are selling shares. the stock market in the short term is not a good yardstick of the value of a company.

As we say on the desk "It's not gone, Mr. Market is just keeping it for a while..." That's an industry joke.

I'm not saying this is going to be a huge long-term issue for $BA but the idea that its an economic non-event for them with 22 airlines now grounding this model (per NYT) is also a little too sanguine for me.

milypan Mar 11, 2019 3:21 pm


Originally Posted by Repooc17 (Post 30874475)
Investigation is still ongoing for JT610, and just underway for ET302. Let's have the pros continue doing their jobs.

Absolutely. It is essential they determine the root causes of the accidents. I'm only pointing out that the data reveal there are one or more problems with the aircraft as currently operated. The investigators will, very likely, determine what those problems are with sufficient time.

saccoNY Mar 11, 2019 3:35 pm


Originally Posted by lighthouse206 (Post 30874252)
If that had happened there'd be a debris trail. None has been reported.


from the article: "Tamirat Abera, 25, was walking past the field at the time. He said the plane turned sharply, trailing white smoke and items like clothes and papers, then crashed about 300 meters away."

DenverBrian Mar 11, 2019 3:49 pm


Originally Posted by fezzington (Post 30873335)
"Conduct an investigation" and not "grounding" is, I think, the right way to go about this until more is known.

Or until another 150 people die. Whichever comes first. :eek:

cerealmarketer Mar 11, 2019 3:50 pm


Originally Posted by saccoNY (Post 30874636)
from the article: "Tamirat Abera, 25, was walking past the field at the time. He said the plane turned sharply, trailing white smoke and items like clothes and papers, then crashed about 300 meters away."

And things like 'clothes and papers' could be mistaken for something ingested by an engine for example

That it took several days for media to find witnesses is testament to the developing world nature of the crash site

But they seem to point to the altitutde data being correct - plane never got more than about 1,000 feet up - flew level for several minutes before crashing in a quick move - and witnesses report plane flying low, making 'unusual' noise (which could simply be flying low)

Several note something trailing the aircraft - 'fire' is often mistaken by witnesses - but sparks, smoke, etc from an engine that ingested something or otherwise failed is common in situations like a compressor stall.

Lots for the investigators to piece together and black box being found will make things clearer quickly.

Weatherboy Mar 11, 2019 3:50 pm

I avoid UA's MAX not because of safety concerns, but because of the horrible F seats. Same is true for the Airbus equipment that uses the same F slimline seat.

Kacee Mar 11, 2019 3:58 pm


Originally Posted by cerealmarketer (Post 30874690)
But they seem to point to the altitutde data being correct - plane never got more than about 1,000 feet up

Huh? NYT reports it was over 8000 feet when transmissions ceased. Boeing 737 MAX Crash


Originally Posted by saccoNY (Post 30874636)
from the article: "Tamirat Abera, 25, was walking past the field at the time. He said the plane turned sharply, trailing white smoke and items like clothes and papers, then crashed about 300 meters away."

And those eyewitness reports are always so reliable.

saccoNY Mar 11, 2019 4:07 pm


Originally Posted by Kacee (Post 30874725)
Huh? NYT reports it was over 8000 feet when transmissions ceased. Boeing 737 MAX Crash

elevation of runway is a little over 7000 ft above sea level...so the aircraft only reached an altitude of 8000 feet or approx. 1000 vertical rise.


Originally Posted by Kacee (Post 30874725)
And those eyewitness reports are always so reliable.


no they are not obviously. But something coming out of the aircraft like smoke witnessed by a half a dozen people, at least, is very notable. As opposed to no smoke.

cerealmarketer Mar 11, 2019 4:07 pm


Originally Posted by Kacee (Post 30874725)
Huh? NYT reports it was over 8000 feet when transmissions ceased. Boeing 737 MAX Crash


And those eyewitness reports are always so reliable.

8000 feet pressure altitude reported by the flight vs 7000 or so ground elevation for the airport is what I gather from reading this:

https://www.flightradar24.com/blog/f...es-flight-302/

cmn.jcs Mar 11, 2019 4:08 pm


Originally Posted by Kacee (Post 30874725)
Huh? NYT reports it was over 8000 feet when transmissions ceased. Boeing 737 MAX Crash

The graph I believe you are referring to (titled "The fluctuating altitude of Ethiopian Airlines Flight 302") is referring to altitude above sea level, not ground level. The airport's elevation above sea level is around 7,000 feet.


Originally Posted by NYT
Altitude fluctuations were recorded shortly after takeoff. The altitude shown is compared with the mean sea level, not the ground level.


hookthem Mar 11, 2019 5:59 pm

IDK, but I’m not flying on the max anymore (have done so multiple hundreds of times)


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