Boeing 737 Max 8 Ethiopia Airlines Crash

In regards to your question on post #260.

 

Both. Trump issued an emergency order to FAA to ground them. Better?

 

So not an FAA decision. The FAA should've mentioned in their statement that it was a presidential order.

 

Does it really matter?

 

For the sake of accuracy, absolutely.

 

You think that these two accidents could've been caused by autopilot induced control surface oscillations?

 

Both AP and the MCAS system can cause pitch control problems.

 

To the point of surface contact?

 

Surface contact?

 

Oh, I thought that you were an aviation guy. Surface contact, as in plane hits the ground. I could also have said ground contact.

 

Or you could have just said "crash" like most folks say aviation or not. You do know planes that land safely also "hit the ground?" Surface contact sounds more like a ship radar seeing boats on the water.

 

To the point of causing a crash?

 

For the sake of trivial pursuit, nothing more.

 

Many planes have crashed due to misdiagnosing AP failures and the wrong emergency procedures used. The MCAS failure resulted in the Lion crash. The MCAS is a new system but even if the bugs get worked out it will still fail for other reasons.

 

Isn't it still speculation that MCAS caused the Lion Air crash? And if you believe that it IS what's caused it and you think that "it will still fail for other reasons", then why the hell are you so critical of the decision to ground?

 

As a pilot, i hold my guns until the powder is tamped. Perhaps it is the autopilot system. But if so, why are the other 373 357's flying well until they were grounded?

 

Think of it like your disk drive.
Lots of them have crashed but yours is still flying.
Everything has a failure rate.

 

too much automation, period... almost anything can cause corrupt data to be sent to flight control ai... there are cases where the ap incorrectly sent altitude data as pitch/attitude , causing severe porpoising.

 

373 357's?

 

FAA and Boeing worked on the fix for the MCAS after the Lion crash. Boeing says it will be available soon. As for your last question, all things fail eventually. That is why the need for mechanics. Should we never fly again because we know all systems fail eventually?

https://www.seattletimes.com/busine...f-737-max-crashes-as-faa-details-boeings-fix/

 

I believe the purpoising as seen by radar of the Indonesian flight was more likely caused by the MCAS. The MCAS put the nose pitch down severaly causing the pilot to pull the yoke back bringing the nose pitch up. Seconds later the MCAS again drove the nose down which the pilot again countered with a nose up pitch. Because the plane was so low to the ground, and the pilot was not properly trained in such an emergency the MCAS eventually drove the aircraft into the ground. This is my opinion on what possible happened.

 

Do you remember the scandal with the DC-10 and the rear door at that time?
Why did this happen only twice in how many hundreds to thousands of flights ... and why was it still such a significant problem that it broke the manufacturer's throat in the end?

 

I don't believe it's too much automation. There's just not enough training in emergency procedures on the automated systems. Their is too much reliance on the systems thinking they will never fail. Flight Engineers were well trained in aircraft systems but they are no longer used. Now pilots are expected to learn the systems more thoroughly and how to manage system failures. System the MCAS is not selected manually like the AP only the circuit breaker could render the system inoperative. Pilots should learn where the C/B is located.

 

Doors on pressurized aircraft open in for obvious reasons. The DC10's cargo doors opened out for more room in the bay. Over time mechanical latches fail due to use. This is what caused the cargo doors to fail on the DC10.

 

Correct ... but not the whole truth. The problem was also that the load masters at the airports, which have to close this door properly, this could not really control the lack of viewing window and display if really is completely locked or not.
In addition, there was no pressure equalization across the floor / ceiling in the event of sudden pressure loss when the door blew out and crashed. This tore the DC-10 in France ...

And as I said, there were only 2 cases ... and only the one in France ended tragically ... no idea how many flight stubs the DC in general. Nevertheless, a gigantic failure with cover-up and catastrophic image loss for the manufacturer, the FAA and the NTSB ... and a very expensive judgment for the manufacturer!

So: only 2 cases where something happens does not mean that it is not a serious problem ... on the contrary!