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Search: Posts Made By: ST Dog
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10th Feb 2020, 22:48
Replies: 262
Views: 97,983
Posted By ST Dog

Agree that appears to be the response in the last...

Agree that appears to be the response in the last decades. More and more automation to overcome human failings and thus leading to less and less capable humans requiring more and more automation....
Forum: Rotorheads
31st Jan 2020, 23:43
Replies: 689
Views: 703,709
Posted By ST Dog

It was Indelible Spirit.

It was Indelible Spirit.
4th Nov 2019, 22:12
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

That was done with the first, high Mach, limited...

That was done with the first, high Mach, limited authority, version of MCAS. It was not rushed. It was found in wind tunnel testing. Multiple options were tested before MCAS was developed.

The...
4th Nov 2019, 17:00
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

One of the recent articles linked discussed it a...

One of the recent articles linked discussed it a bit.

As I recall, the FHA was reviewed and determined the new function did not increase the hazard, so the SSA wasn't updated.
The new...
1st Nov 2019, 22:24
Replies: 357
Views: 466,607
Posted By ST Dog

The repair seems to be a replacement of the fork...

The repair seems to be a replacement of the fork and the strap behind it.

As for the location, the Boeing instructions, reference by the FAA AC includes photos of the cracks.
Go back to the...
1st Nov 2019, 15:49
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

The column cutout stops trim opposing the stick....

The column cutout stops trim opposing the stick. If pulling up the cutout does not prevent ANU trim.
MCAS trims opposite the column (to make it harder to continue pulling up) which is why it had to...
31st Oct 2019, 18:54
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

That all aligns with my experiences in any...

That all aligns with my experiences in any company. In general managers frown on people speaking up and even worse going over there heads.
The worst was active duty military.

I've heard the lip...
31st Oct 2019, 18:36
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

That appears to be the norm for most of the...

That appears to be the norm for most of the systems I've worked on. The same seems true for most of the "design" documents.
30th Oct 2019, 18:49
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Wasn't trying to be snarky. Just wondering. My...

Wasn't trying to be snarky. Just wondering. My experience with safety analyses for aircraft systems and ARP4761 and ARP4754A colors my comments.
I've seen a lot of comments here that lead me to...
29th Oct 2019, 17:52
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Just curious. How many safety analysis have you...

Just curious. How many safety analysis have you been involved with, with writing or reviewing?
FHA, FMEA, FTA, etc.

Having been involved with several and what has been published about the process...
25th Oct 2019, 23:05
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

And as the NTSB report stated, it ignored the...

And as the NTSB report stated, it ignored the rest of the flight deck effects.

A human factors failure in large part, but also an inherent problem with how FHAs and FMEAs are done (not just at...
25th Oct 2019, 23:00
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

If the airspeed checklist was followed then you'd...

If the airspeed checklist was followed then you'd be in a better position to maintain control, especially before flaps-up.

Once past that, or if not done at all, executing the runaway stab check...
25th Oct 2019, 22:51
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

I recall that the airline procedures were for the...

I recall that the airline procedures were for the PM (FO here) to do the memory items/checklists while the PF flies the plane.


There was also commentary about the Captain not controlling the...
25th Oct 2019, 19:41
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Some interesting takes on the report... I...

Some interesting takes on the report...
I haven't finished it, but what I've read so far doesn't really correlate with many of the comments so far.

I do appreciate the more in-depth report of the...
24th Oct 2019, 00:51
Replies: 270
Views: 352,666
Posted By ST Dog

Scale/tests haven't changed. There are 2...

Scale/tests haven't changed.

There are 2 tests and thus 2 number Resesrch and Motor Octane Number (RON and MON)

UDA used the average of the two. That's why the sticker in the pump says (R+M)/2....
23rd Oct 2019, 20:48
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Seems to happen more in smaller companies,...

Seems to happen more in smaller companies, particularly when lead by engineers (like the semiconductor company I was once with).
As they grow, business (MBA) type and marketing get more and more...
23rd Oct 2019, 19:03
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

I'd have to research the history of that...

I'd have to research the history of that regulation, but I suspect it predates the NG.
More likely the NG (or even the Classic) was designed to stay under the limit.
23rd Oct 2019, 18:59
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Engineers seldom get free reign on design. They...

Engineers seldom get free reign on design. They deal with design constraints set by company policies and marketing.

That's just life as an engineer, especially at a large company.
23rd Oct 2019, 18:56
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

If that's really in the report, and not just a...

If that's really in the report, and not just a bad reporting job, then it contradicts what has been stated about MCAS.

Other repeated inaccuracies too, but that bit caught my attention.
23rd Oct 2019, 18:44
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Maybe. I don't think it was explored in the...

Maybe. I don't think it was explored in the design because doing so would have negated constraints of the prospective buyers.
Given the design constraints, taller gear wasn't an option to even...
22nd Oct 2019, 17:29
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

But the reason for MCAS is a separate discussion...

But the reason for MCAS is a separate discussion from what MCAS was intended to do.
It appears to work fine on the tanker, the difference being the implementation.
And it's not much different...
22nd Oct 2019, 00:01
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

I think they meant the concept of what MCAS was...

I think they meant the concept of what MCAS was supposed to do. Poorly implemented but sound concept.
21st Oct 2019, 22:23
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

As an EE I'd hope I'd do the same too. But just...

As an EE I'd hope I'd do the same too.
But just how far one would actually go is hard to say until in that situation.

It's one thing to bring something up and have higher management overrule you....
18th Oct 2019, 18:04
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

Anyone have more info on what those messages...

Anyone have more info on what those messages supposedly contain?
All I see is
"suggest that employees misled the FAA about a key safety system on the 737 Max"
18th Oct 2019, 18:02
Replies: 4,656
Views: 4,200,685
Posted By ST Dog

It does say that the SIM tests are to help...

It does say that the SIM tests are to help determine required training updates.
https://www.cnn.com/2019/10/17/politics/737-max-boeing-flight-simulator/index.html
3rd paragraph:



They also...
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