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Search: Posts Made By: Tomaski
Showing results 1 to 35 of 118
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Forum: Rumours & News
5th Nov 2019, 02:46
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

While the data may not be public, I'm pretty sure...

While the data may not be public, I'm pretty sure the non-MCAS, high-AOA flight profiles have already been done (and likely redone since the accidents). It was those flight tests that identified the...
Forum: Rumours & News
30th Oct 2019, 14:58
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

While not explicitly stated in any Boeing...

While not explicitly stated in any Boeing statements, the cynical side of me believes the engineering team thought this design was okay because when the stick shaker went off and the pilots went into...
Forum: Rumours & News
30th Oct 2019, 12:10
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Here's the link...

Here's the link (https://www.satcom.guru/2019/10/flawed-assumptions-pave-path-to-disaster.html).

Long read. Lot's of good, highly technical info and analysis. Better than what you would get in...
Forum: Rumours & News
29th Oct 2019, 11:56
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

In the wake of the two MAX accidents, pilots...

In the wake of the two MAX accidents, pilots shouldn't have to ask to see either an Airspeed Unreliabe during takeoff or Runaway Stab Trim. Lack of familiarity and/or proficiency with these...
Forum: Rumours & News
28th Oct 2019, 13:02
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Agree, but the question I was answering is...

Agree, but the question I was answering is whether the AOA DISAGREE warning would have made any difference to the accident flight crew as they were trying to sort out the problem.
Forum: Rumours & News
27th Oct 2019, 12:21
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Regarding questions as to what the crew should...

Regarding questions as to what the crew should have done in response to the initial indications associated with the AOA malfunction......

FWIW, beginning on page 91 of the final accident report,...
Forum: Rumours & News
26th Oct 2019, 19:14
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

How a flight crew would respond in the situation...

How a flight crew would respond in the situation will be a function of what they know about the underlying system and how they have been trained to execute this procedure. There are major...
Forum: Rumours & News
26th Oct 2019, 11:53
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

The final accident report mentions that there...

The final accident report mentions that there have been 16 known cases of inadvertent stick shaker activations on the 737NG fleet. It does not detail the underlying cause of these activations. All...
Forum: Rumours & News
26th Oct 2019, 11:14
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Re MCAS overriding the crew - it was, in fact,...

Re MCAS overriding the crew - it was, in fact, the opposite. The Main Electric Trim (MET) overrode MCAS ever time it was used. As we saw when the Captain was the PF, aggressive MET inputs could...
Forum: Rumours & News
26th Oct 2019, 03:03
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

I will again make the observation that, with the...

I will again make the observation that, with the exception of a single MCAS cycle (after which the crew extended the flaps) the ONLY malfunction that this crew was dealing with for the first five...
Forum: Rumours & News
25th Oct 2019, 22:38
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

This is is what the report says about the Lion...

This is is what the report says about the Lion Air QRH procedures:

"When a non–normal situation occurs, at the direction of the pilot flying, both crew members do all memory items in their areas...
Forum: Rumours & News
25th Oct 2019, 22:31
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

I'll remind you here that your question was about...

I'll remind you here that your question was about the Airspeed Unreliable procedure, which I answered specifically.

Beyond that, here is absolutely no requirement to make an either/or choice...
Forum: Rumours & News
25th Oct 2019, 20:24
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Autopilot engagement was specifically precluded...

Autopilot engagement was specifically precluded due to the Airspeed Unreliable condition.
Forum: Rumours & News
25th Oct 2019, 20:22
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Let me rephrase my answer. You asked: ...

Let me rephrase my answer. You asked:



I'm going to ignore the "hotshot pilots" comment because quite frankly there was a valid point to be made here. Prompt and accurate execution of the...
Forum: Rumours & News
25th Oct 2019, 15:45
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

It's not really quite that simple. There are a...

It's not really quite that simple. There are a couple significant issues with the Airspeed Unreliable NNC. First, being somewhat generic it does not provide a lot of specific guidance on how to...
Forum: Rumours & News
25th Oct 2019, 13:17
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

In the online news trade, there is a separate...

In the online news trade, there is a separate staff who is in charge of writing the headlines with the object to attract as many "clicks" as possible. This article will probably be repeated on a...
Forum: Rumours & News
25th Oct 2019, 13:10
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

I haven't had a chance to read the final report...

I haven't had a chance to read the final report yet, but from the excerpts in the press I haven't seen anything that hasn't already been extensively discussed on this forum. No real surprises so far.
Forum: Rumours & News
25th Oct 2019, 13:05
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

A gentle reminder that the purpose of the...

A gentle reminder that the purpose of the official accident report is to identify all the primary and secondary factors that contributed to an accident and recommend steps to mitigate those factors...
Forum: Rumours & News
24th Oct 2019, 18:43
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Entire article: Ex-Boeing Pilot Complained...

Entire article:

Ex-Boeing Pilot Complained of Management Pressure on MAX, Former Colleagues Say...
Forum: Rumours & News
22nd Oct 2019, 21:05
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

I'm pretty sure that flight testing was done as...

I'm pretty sure that flight testing was done as part of the original certification process, and it was the results of these tests that determined the need for something like MCAS. I believe I also...
Forum: Rumours & News
20th Oct 2019, 13:30
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

It's actually worse than that. Despite the...

It's actually worse than that. Despite the removal of a bunch of system information over the years, there is plenty of information still in the manuals that is no longer required knowledge. Pilots...
Forum: Rumours & News
20th Oct 2019, 12:42
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Are you referring to training for the maintenance...

Are you referring to training for the maintenance side?
Forum: Rumours & News
20th Oct 2019, 12:32
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Point of clarification needed here. MEL =...

Point of clarification needed here.

MEL = Minimum Equipment List
CDL = Configuration Deviation List

Both of these documents provide the operator the authority to dispatch an aircraft with...
Forum: Rumours & News
20th Oct 2019, 00:27
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Guilty as charged, but with reasonable grounds. ...

Guilty as charged, but with reasonable grounds.

First I'd like to say that we should be careful in our use of the term "supporting evidence." Discussions on PPRuNe seem to function reasonably well...
Forum: Rumours & News
19th Oct 2019, 15:03
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Granted, aviation has been getting safer, in...

Granted, aviation has been getting safer, in large part to improved procedures, technological aids (GPWS, TCAS, GPS, and the like), more reliable aircraft designs as well as the appropriate use of...
Forum: Rumours & News
19th Oct 2019, 13:25
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

It is entirely possible to believe the following...

It is entirely possible to believe the following things simultaneously:

1. Boeing really, really screwed up the MAX design process.
2. The FAA really, really dropped the ball when it came to...
Forum: Rumours & News
19th Oct 2019, 13:08
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

A few random thoughts, in no particular order: ...

A few random thoughts, in no particular order:

1. It is worthwhile to read the entire exchange and not just the posted excerpts. This was obviously a casual conversation between co-workers that...
Forum: Rumours & News
16th Oct 2019, 21:39
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

File under general buffoonery. I heard this story...

File under general buffoonery. I heard this story third-hand a few months back but didn’t think it credible. I guess I was wrong. The Lion Air maintenance department certainly has not been...
Forum: Rumours & News
16th Oct 2019, 11:08
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

In general, force is proportional to speed...

In general, force is proportional to speed squared, but there are a lot of moving parts, so to speak, that effect the total forces on the jackscrew. And while the forces on the jackscrew are actual,...
Forum: Rumours & News
15th Oct 2019, 19:54
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

The degree of difficulty of using the manual trim...

The degree of difficulty of using the manual trim is not so much a function of absolute trim position as it is how far from neutral trim the stab is - you don't have to hit the stops of the trim...
Forum: Rumours & News
15th Oct 2019, 16:47
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

The simplest way to explain it is that the harder...

The simplest way to explain it is that the harder one has to push or pull on the control column, the harder it will be to use the manual trim wheel. Thus larger elevator deflections, higher speeds,...
Forum: Rumours & News
14th Oct 2019, 13:20
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

That is certainly one possibility. The other, of...

That is certainly one possibility. The other, of course, is that there was pressure on both flight crews and technicians to keep the metal moving. It was an unusual choice for the penultimate Lion...
Forum: Rumours & News
11th Oct 2019, 21:30
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

While that was how the test failure was initially...

While that was how the test failure was initially reported, later reporting refuted this particular detail. A subsequent article discussed how an intentionally induced fault (caused by "flipping...
Forum: Rumours & News
11th Oct 2019, 16:44
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Because the current procedure actually delays the...

Because the current procedure actually delays the crew response to an actual runaway stab trim. I believe this may have been one of the issues in the E-CAB test failure in which the FAA determined...
Forum: Rumours & News
10th Oct 2019, 18:01
Replies: 4,656
Views: 4,783,256
Posted By Tomaski

Speed Trim failure is not new and has an...

Speed Trim failure is not new and has an associated annunciator on the overhead panel. Loss of Speed Trim is not a serious issue.
Stab Out of Trim is an annunciated malfunction that occurs when...
Showing results 1 to 35 of 118
 
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