PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
 
Page 1 of 3
1
2
3
Search: Posts Made By: A Squared
Showing results 1 to 35 of 95
Search took 0.00 seconds.
Forum: Rumours & News
7th Dec 2018, 20:41
Replies: 2,099
Views: 1,471,742
Posted By A Squared

That is true, but from the descriptions I have...

That is true, but from the descriptions I have read of the MCAS, my understanding is that this is exactly the way the MCAS would behave in an actual high AoA situation, intermittent adjustments of...
Forum: Rumours & News
29th Nov 2018, 15:33
Replies: 2,099
Views: 1,471,742
Posted By A Squared

No. Not at all. there is nothing to suggest that...

No. Not at all. there is nothing to suggest that their airspeed decayed, and a lot of evidence (FDR airspeed and ground speed and ADS-B Groundspeed, all consistent) whcih indicates that it did *not*...
Forum: Rumours & News
23rd Nov 2018, 15:04
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Which sometimes activates in anticipation of the...

Which sometimes activates in anticipation of the accident.
Forum: Rumours & News
23rd Nov 2018, 15:02
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Yes, that is my understanding as well, and it's...

Yes, that is my understanding as well, and it's not a trivial point. The page of the aircraft maintenance log for the flight prior to the accident flight has been published online. There is no...
Forum: Rumours & News
22nd Nov 2018, 15:00
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I would require a lot more information and...

I would require a lot more information and context before getting outraged. What precisely was the "hydraulic failure"? Was it something which could legally be deferred in accordance with a MEL,...
Forum: Rumours & News
22nd Nov 2018, 13:32
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Not a 737 systems expert, but I'm not sure the...

Not a 737 systems expert, but I'm not sure the answer is quite so simple as is being made out here. In fact, jackscrew driven mechanisms *can* move if the actuating nut is loaded and there's not...
Forum: Rumours & News
21st Nov 2018, 16:14
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Item number 2 does not say "You will only...

Item number 2 does not say "You will only encounter this when the autopilot is engaged" Or anything that could reasonably construed as such. What it *does* say, is "Autopilot (If engaged)". The key...
Forum: Rumours & News
16th Nov 2018, 10:53
Replies: 2,099
Views: 1,471,742
Posted By A Squared

No, actually, raising the thrustline of...

No, actually, raising the thrustline of underslung engines would decrease the tendency of a power application to cause a pitch-up.

The reason for the pitch instability is the aerodynamic effects...
Forum: Rumours & News
16th Nov 2018, 07:54
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Ummm, perhaps because they haven't. The wing...

Ummm, perhaps because they haven't. The wing area has grown 40% since the 100 thru 500, and the MAX wing has grown a smaller increment from the NG's
Forum: Rumours & News
15th Nov 2018, 05:23
Replies: 2,099
Views: 1,471,742
Posted By A Squared

It's worth pointing out that only a pilot who was...

It's worth pointing out that only a pilot who was aware of MCAS and knew knew it's operation parameters might think to try that. Until a few days ago there were no airline pilots who fit that...
Forum: Rumours & News
14th Nov 2018, 18:58
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I was just thinking the other day ..."Hmmmm...

I was just thinking the other day ..."Hmmmm Haven't seen much of tdracer lately ... " Not that I blame you.
Forum: Rumours & News
14th Nov 2018, 18:55
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I don't know. I'm just saying that Boeing's words...

I don't know. I'm just saying that Boeing's words in the AD seems to indicate that moving the switches to "CUTOUT" is not a 100% guaranteed clean kill on stabilizer trimming. Why that is, or how it...
Forum: Rumours & News
14th Nov 2018, 17:10
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I'm not sure it's quite as clear as you think it...

I'm not sure it's quite as clear as you think it is. The guidance in the Emergency Airworthiness Directive states:



To me, that last sentence says "You can turn it off, but it might still keep...
Forum: Rumours & News
14th Nov 2018, 11:47
Replies: 2,099
Views: 1,471,742
Posted By A Squared

So, assuming the MAX is not terribly different,...

So, assuming the MAX is not terribly different, you may only be 2 operation cycles of the MCAS away from having your stabilizer at full stab-up (nose down) travel.
Forum: Rumours & News
14th Nov 2018, 11:36
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Or to put it differently: When is a 737 no...

Or to put it differently: When is a 737 no longer a 737?
Forum: Rumours & News
14th Nov 2018, 11:25
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Not to say that you're wrong, that may well have...

Not to say that you're wrong, that may well have been the thinking. But the objections to that rationale is that the MCAS does something pretty different than the STS (almost opposite) for different...
Forum: Rumours & News
14th Nov 2018, 11:17
Replies: 2,099
Views: 1,471,742
Posted By A Squared

No disagreement. Any time you're changing the...

No disagreement. Any time you're changing the angle of a stabilizer, the potential exists for loss of control of the aircraft if you lose control of the system adjusting the stabilizer. I doubt...
Forum: Rumours & News
14th Nov 2018, 10:46
Replies: 2,099
Views: 1,471,742
Posted By A Squared

You're probably correct that "degrees" doesn't...

You're probably correct that "degrees" doesn't appear in *operational* publications, But I would speculate that you would find "degrees" in design/engineering/maintenance publications, and that's...
Forum: Rumours & News
14th Nov 2018, 10:22
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I agree with your comments about the MCAS, I...

I agree with your comments about the MCAS, I disagree that "fanciful" is unnecessarily harsh. Boeing knows what caused the crash and how their automated stabilizer trim systems contributed to that....
Forum: Rumours & News
14th Nov 2018, 09:32
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I would have to assume that when Boeing publishes...

I would have to assume that when Boeing publishes a technical description of a control system in a bulletin to one of their manuals whcih says "...2.5 degrees ..... 0.27 degrees per second ...." That...
Forum: Rumours & News
14th Nov 2018, 08:36
Replies: 2,099
Views: 1,471,742
Posted By A Squared

As nearly as I can tell, you theory is that...

As nearly as I can tell, you theory is that Boeing just changed the name from STS to MCAS and that whatever happened to the Lion airplane could happen to other 737 model prior to the MAX . There's a...
Forum: Rumours & News
13th Nov 2018, 21:26
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I'm curious about that as well.

I'm curious about that as well.
Forum: Rumours & News
13th Nov 2018, 21:09
Replies: 2,099
Views: 1,471,742
Posted By A Squared

My guess: Because that's what was easiest. To add...

My guess: Because that's what was easiest. To add a stick pusher requires adding hardware. You have to add an actuator and linkage to the control system. Adds weight and cost and parts count, and I...
Forum: Rumours & News
13th Nov 2018, 14:11
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Point of order; they didn't just withhold...

Point of order; they didn't just withhold information on the "potential hazards associated with a new flight-control feature", they withheld information of the very existence of the "new...
Forum: Rumours & News
13th Nov 2018, 11:14
Replies: 2,099
Views: 1,471,742
Posted By A Squared

I haven't seen anything to suggest that the stick...

I haven't seen anything to suggest that the stick shaker activated on one side or another in this accident. We don't have that kind of detail on what went on, or I haven't seen it anyway. Boeing...
Forum: Rumours & News
12th Nov 2018, 15:16
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Boeing think that Boeing knows. The Boeing's...

Boeing think that Boeing knows. The Boeing's manual bulletin and subsequent AD say that it is applicable to the 737MAX8 and 737MAX9 (But not the 737MAX7) They didn't choose that list of applicable...
Forum: Rumours & News
12th Nov 2018, 08:40
Replies: 2,099
Views: 1,471,742
Posted By A Squared

For clarity, there is no "AD Bulletin" There is...

For clarity, there is no "AD Bulletin" There is an AD (Airworthiness Directive, AD #: 2018-23-51) and a "Flight Crew Operations Manual Bulletin" (TBC-19) The same-side stick shaker is mentioned in...
Forum: Rumours & News
12th Nov 2018, 07:51
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Thanks. Perhaps it's splitting hairs, but I'm not...

Thanks. Perhaps it's splitting hairs, but I'm not sure that bad AoA data was a "triggering event" in that accident. In the Lion Air Accident, the current working theory is that bad AoA data caused...
Forum: Rumours & News
12th Nov 2018, 06:29
Replies: 2,099
Views: 1,471,742
Posted By A Squared

The current Lion crash is the only accident I can...

The current Lion crash is the only accident I can think of where inaccurate AoA data was (may have been) a triggering event. What are some others?
Forum: Rumours & News
11th Nov 2018, 15:16
Replies: 2,099
Views: 1,471,742
Posted By A Squared

The Emergency Airworthiness Directive is...

The Emergency Airworthiness Directive is available on the FAA's website. The APA letter posted by Halfnut contains a link to that Airworthiness Directive.
Forum: Rumours & News
11th Nov 2018, 12:48
Replies: 2,099
Views: 1,471,742
Posted By A Squared

The names reported in the media for the crew of...

The names reported in the media for the crew of the accident flight are different than the crew names written on the tech log from the previous flight. No idea about the other sectors.
Forum: Rumours & News
11th Nov 2018, 10:58
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Reading the letter pasted by Halfnut above my...

Reading the letter pasted by Halfnut above my understanding is:

1. ) The Maneuvering Characteristics Augmentation System (MCAS) is a system that is distinct from the Speed Trim System (STS) and...
Forum: Rumours & News
10th Nov 2018, 18:25
Replies: 2,099
Views: 1,471,742
Posted By A Squared

That depends on what you mean by "go to manual". ...

That depends on what you mean by "go to manual". If you mean, just disengaging autopilot and hand flying in a normal situation, No. As I understand it (not a 737 pilot) the STS is there...
Forum: Rumours & News
9th Nov 2018, 07:58
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Agree with all that. the "scratching my head" was...

Agree with all that. the "scratching my head" was about CYTN asking a question to which he appears to have supplied the answer in a prior post. No matter, at least it clarified in my mind when the...
Forum: Rumours & News
9th Nov 2018, 07:17
Replies: 2,099
Views: 1,471,742
Posted By A Squared

Agree. I don't see anything on the aircraft log...

Agree. I don't see anything on the aircraft log that indicates a part was replaced. It seems like I recently read that the AoA sensor was replaced on flight prior to flight immediately before the...
Showing results 1 to 35 of 95
 
Page 1 of 3
1
2
3


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.