Search found 5 matches

by zhetenyi1973
Fri Jun 28, 2019 4:19 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 385201

Re: Boeing 737MAX Grounded Worldwide Q2 2019

The other thing, in terms of timeliness, is that if these chips are associated with real-time constraints is they won’t be running anything approaching a ‘normal’ OS. They’ll be no pre-emotive multitasking or anything like that (again, doesn’t help for worst case execution times). It’ll be single t...

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by zhetenyi1973
Sat May 04, 2019 12:08 pm
Forum: Civil Aviation
Topic: Boeing 737MAX Grounded Worldwide Q2 2019
Replies: 3768
Views: 385201

Re: Boeing 737MAX Grounded Worldwide Q2 2019

Hi, SW engineer here. First, everyone here should read these: http://www.logikalsolutions.com/wordpress/information-technology/did-agile-make-the-737max-fall-from-the-sky/ https://hypothesis-discovery.com/2019/03/24/boeing-737-max-a-minimum-viable-product/ I agree that the MCAS situation is very clo...

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by zhetenyi1973
Fri Apr 05, 2019 8:14 am
Forum: Civil Aviation
Topic: Ethiopian Airlines 737MAX crashes enroute to Nairobi Q1 2019
Replies: 5474
Views: 718188

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Since MCAS is always on why we do not see more MCAS trim commands for more than 2 minutes? Its not always on, read the posts between page 84 and 86 about the conditions for MCAS to transmit commands. I meant "it is always on" if the appropriate conditions apply. Since there was an MCAS ac...

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by zhetenyi1973
Fri Apr 05, 2019 5:15 am
Forum: Civil Aviation
Topic: Ethiopian Airlines 737MAX crashes enroute to Nairobi Q1 2019
Replies: 5474
Views: 718188

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

Since MCAS is always on why we do not see more MCAS trim commands for more than 2 minutes?

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by zhetenyi1973
Thu Apr 04, 2019 7:17 pm
Forum: Civil Aviation
Topic: Ethiopian Airlines 737MAX crashes enroute to Nairobi Q1 2019
Replies: 5474
Views: 718188

Re: Ethiopian Airlines 737MAX crashes enroute to Nairobi

What I don't understand why there is no MCAS trim down action for a considerable time. Shouldn't we see MCAS activation during this time without the trim movement? It happened once why did it not happen after that? Also, why did the crew not trim back to 5 units? Why did they stop at 2.3 before cuto...

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