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Forum: Tech Log

11th Apr 2019, 17:10

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

Authority (per increment / reset) was definitely...

Authority (per increment / reset) was definitely increased from the original design of 0.6 degrees to 2.5, I don't know whether this was done by increasing speed or duration or both - the speed...

Forum: Tech Log

1st Apr 2019, 16:21

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

Thanks for the pointer. This bit jumped out for...

Thanks for the pointer. This bit jumped out for me:

"Blip, relax, assess. Blip, relax, assess."

One wonders what the result of that trim technique would be with MCAS in play...:uhoh:

Forum: Tech Log

27th Mar 2019, 17:33

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

The thread: ...

The thread: https://www.pprune.org/tech-log/619326-boeing-advice-aerodynamically-relieving-airloads-using-manual-stabilizer-trim.html covers more-or-less the same thing I think. It's not that the...

Forum: Tech Log

25th Mar 2019, 16:10

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

I think I asked about this too at one point on...

I think I asked about this too at one point on one thread, I vaguely recall that there was a sort-of answer that they are now "primary" and "backup" cutouts and both of them cut both (auto and...

Forum: Tech Log

13th Dec 2018, 10:23

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

Wonder how many people that phrase has killed in...

Wonder how many people that phrase has killed in the history of aviation engineering. :(

For instance, obviously no airline crew is going to conduct a high AOA test at lower-than-specified level...

Forum: Tech Log

12th Dec 2018, 17:01

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

@FCeng84 I get most of what you've said, makes...

@FCeng84 I get most of what you've said, makes sense and moreover it matches my understanding of the high-AOA function in the NG, but this bit I don't get.

If I understand the NG functional...

Forum: Tech Log

27th Nov 2018, 14:17

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

I can't meet that first requirement but in the...

I can't meet that first requirement but in the absence of any more authoritative answer, I think you are likely correct based on 737NG information published (which matches some NG AMM chapters I...

Forum: Tech Log

25th Nov 2018, 21:32

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

I have acquired some chapters from NG AMM which I...

I have acquired some chapters from NG AMM which I think cover what you are looking for, but it seems to have changed for the MAX, see this post (https://www.pprune.org/showthread.php?p=10313316) in...

Forum: Tech Log

25th Nov 2018, 21:14

Replies: 195

737MAX Stab Trim architecture

Views: 133,178

Posted By infrequentflyer789

I'm not sure. In effect the aircraft was...

I'm not sure. In effect the aircraft was repeatedly trimming against them, now I've read some of the archived discussions on Speed Trim/ STS both here and elsewhere and there are plenty of comments...

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