Jude Bradley

Lion-Air 737Max Possible cause.

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Interesting. Perhaps Lion Air DID take up the option of AONS with commsat. After all, it's a pretty quick reaction from Boeing supposedly without the FDR from the accident aeroplane.

We should, however, refrain from attributing cause for the moment.

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Thanks for posting, Jude! Interesting and shocking at the same time.

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If - and I do stress if - this is the case with the 737 MAX, it would be quite an alarming issue. Of course even if this is a thing which can occur on the 737 MAX, it still does not mean that this was actually the cause of the Lion Air accident, although one has to say that it would seem to fit the profile of the incident quite well as a potential factor.

Edited by Chock
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9 minutes ago, Jude Bradley said:

That's why I was careful to mention "possible cause".

Indeed.

It serves to potentially highlight the importance of being able to hand fly; what with STS going haywire with incorrect AoA indications, and in VFR daylight, the pilots role is to trim against the aircraft to produce correct pitch to maintain sufficient air speed. Which appears not to have happened in this case.

Edited by ganter

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The interesting question for me, is why the crew on the previous flight managed to deal with what was apparently the exact same problem, and get the plane on the ground safely. What was different about the flight that crashed?

One suggestion over at pprune is that it might be the presence of a company engineer on board, apparently there to help debug the problems the plane was having. And that might have led to more cockpit confusion. Just pure speculation though. They need to find the CVR.

Of course another question is why the aircraft was signed-off for revenue flight after having that much trouble on the previous leg. Placing an engineer on board the next leg to debug would be a test flight, not something paying passengers should ever have been exposed to.

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1 hour ago, Paraffin said:

Of course another question is why the aircraft was signed-off for revenue flight after having that much trouble on the previous leg. Placing an engineer on board the next leg to debug would be a test flight, not something paying passengers should ever have been exposed to.

+1, dear lord.. is like a paid test fly..

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It is starting to sound like a potential issue that really should ground the 737 MAX fleet until it has been corrected. Workarounds for potentially serious problems during passenger flights are really not acceptable.

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