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Search: Posts Made By: spornrad
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Forum: Rumours & News
27th Nov 2019, 08:52
Replies: 4,656
Views: 4,791,248
Posted By spornrad

https://theaircurrent.com/aviation-safety/boeing-7...

https://theaircurrent.com/aviation-safety/boeing-737-max-re-certificaton-likely-to-slide-into-2020-ryanair-model-faces-new-design-issue/
Re-certification sliding into 2020, FAA reissues statement it...
Forum: Rumours & News
23rd Nov 2019, 13:02
Replies: 4,656
Views: 4,791,248
Posted By spornrad

From the Canadian engineer's email: ...Not...

From the Canadian engineer's email:
...Not knowing the exact reasons for telling us that 12.1 as a fix is not effective (ref. F2.3 recent change to CAT), the fact is that it is
another point that...
Forum: Rumours & News
23rd Nov 2019, 10:59
Replies: 4,656
Views: 4,791,248
Posted By spornrad

They seem to have recognized that MCAS column...

They seem to have recognized that MCAS column cutout override robs the pilot of his natural countermeasure. Now they leave that override, and stick a SW band-aid on top. Arghhh...
Forum: Rumours & News
23rd Nov 2019, 10:11
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Two more interesting points in the slide: A SW...

Two more interesting points in the slide: A SW column cutout. Can be interpreted, that SW is now supposed to decide whether a pilot is flying into a stall, or if he is desperately trying to recover...
Forum: Rumours & News
11th Nov 2019, 08:38
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Interview with Patrick Ky, hear of EASA a week...

Interview with Patrick Ky, hear of EASA a week ago: (https://aviationweek.com/commercial-aviation/easa-s-director-expects-boeing-737-max-return-decision-january-0)
...
You indicated that you wanted...
Forum: Rumours & News
5th Nov 2019, 08:06
Replies: 4,656
Views: 4,791,248
Posted By spornrad

While I understand your point to some extent, I...

While I understand your point to some extent, I believe you are grossly underrating the breach of trust resulting from the actions of both Boeing management and the FAA. Take statements from well...
Forum: Rumours & News
4th Nov 2019, 20:41
Replies: 4,656
Views: 4,791,248
Posted By spornrad

A third possible reason could have been...

A third possible reason could have been minimizing HW changes for a last minute, rushed band aid. MCAS is basically a software module running on the pre-existing FCC. HW consists only of two...
Forum: Rumours & News
2nd Nov 2019, 15:55
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Thanks for the explanation, makes sense.

Thanks for the explanation, makes sense.
Forum: Rumours & News
2nd Nov 2019, 15:25
Replies: 4,656
Views: 4,791,248
Posted By spornrad

There was a time when a "self-stalling tendency"...

There was a time when a "self-stalling tendency" was simply called by its name (https://leehamnews.com/2019/11/01/a-basic-mcas-system-was-installed-in-the-boeing-707-in-the-1960s/) (talking about the...
Forum: Rumours & News
2nd Nov 2019, 13:52
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Pilot, relying on stick force feedback,...

Pilot, relying on stick force feedback, inadvertently stalling the airplane?
Forum: Rumours & News
1st Nov 2019, 18:52
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Merci beaucoup! From the Leeham article:...

Merci beaucoup!
From the Leeham article: (https://leehamnews.com/2019/11/01/a-basic-mcas-system-was-installed-in-the-boeing-707-in-the-1960s/#more-31553)In his book Handling the Big Jets (first...
Forum: Rumours & News
1st Nov 2019, 09:56
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Leeham has an interesting article about the most...

Leeham has an interesting article about the most ancient version of a MCAS-style system, in the B707-400 !Little known because totally innocent is her "stick nudger". In contrast to MCAS, however, it...
Forum: Rumours & News
31st Oct 2019, 19:02
Replies: 4,656
Views: 4,791,248
Posted By spornrad

All relevant wiring diagrams with a comparison...

All relevant wiring diagrams with a comparison NG/MAX can be found here:
https://www.satcom.guru/2019/08/connecting-dots-from-command-to-action.html
The override relay function is shown here:
...
Forum: Rumours & News
30th Oct 2019, 12:15
Replies: 4,656
Views: 4,791,248
Posted By spornrad

After having re-read Peter's exhaustive and...

After having re-read Peter's exhaustive and complex analysis of certification and safety assessment of the MAX several times, I dare trying a short summary. Peter Lemme comes up with three major...
Forum: Rumours & News
20th Oct 2019, 07:30
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Forkner did convince the FAA to leave MCAS...

Forkner did convince the FAA to leave MCAS unmentioned in March 2016, before his discovery of the high trim authority / low airspeed variant described in those messages. Thus his remark "I lied to...
Forum: Rumours & News
19th Oct 2019, 13:25
Replies: 4,656
Views: 4,791,248
Posted By spornrad

It was the other way round. From the JATR report:...

It was the other way round. From the JATR report:
Observation O3.4-A: The original implementation of MCAS was driven primarily by its ability to provide the B737 MAX with FAA-compliant flight...
Forum: Rumours & News
19th Oct 2019, 09:40
Replies: 4,656
Views: 4,791,248
Posted By spornrad

If this was about a mere sim software issue, why...

If this was about a mere sim software issue, why worry about "having lied to the regulators"?
Nov 2016 they were less than half a year away from certification in March 2017...
Forum: Rumours & News
19th Oct 2019, 08:26
Replies: 4,656
Views: 4,791,248
Posted By spornrad

The two test pilots seem to describe a scenario...

The two test pilots seem to describe a scenario in aspects similar to the later accident flights. Sim failure or not, it is getting very difficult to argue: oops, we didn't anticipate the erroneous...
Forum: Rumours & News
18th Oct 2019, 19:54
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Original email exchange here: ...

Original email exchange here:
https://theaircurrent.com/aviation-safety/new-document-in-737-max-investigation-points-to-chaos-pressure-in-mcas-development/
Forum: Rumours & News
13th Oct 2019, 09:32
Replies: 4,656
Views: 4,791,248
Posted By spornrad

search for 737 trim incidents

Peter Lemme has an article containing a long list of earlier 737 trim incidents, most on pre-MAX types. Doesn't seem to find earlier MCAS type failures....
Forum: Rumours & News
12th Oct 2019, 16:42
Replies: 4,656
Views: 4,791,248
Posted By spornrad

[/LEFT] That means in my view: If...

[/LEFT]


That means in my view: If STS/MCAS/FCC is required for envelope protection, the present dual channel design is in no way sufficient/acceptable. Whether the MAX can be possibly...
Forum: Rumours & News
12th Oct 2019, 12:16
Replies: 4,656
Views: 4,791,248
Posted By spornrad

Bombshell in JATR report?

Finding F3.5-C The JATR team considers that the STS/MCAS and EFS functions could be considered as stall identification systems or stall protection systems, depending on the natural (unaugmented)...
Showing results 1 to 22 of 22


 
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