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Search: Posts Made By: infrequentflyer789
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Forum: Rumours & News
8th May 2019, 08:31
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Way back in the LionAir threads it was revealed...

Way back in the LionAir threads it was revealed that Max simulator data packs are delivered as binaries with a fixed set of malfunctions, this is another change from NG, and almost certainly is...
Forum: Rumours & News
4th May 2019, 14:55
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

What do you make of this from ET: 05:40:27 -...

What do you make of this from ET:

05:40:27 - the Captain advised the First-Officer to trim up with him

Bearing in mind preceding it is an ineffective (in timing and duration compared to 1st...
Forum: Rumours & News
30th Apr 2019, 20:01
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

I think that is unfair to Boeing - B has had a...

I think that is unfair to Boeing - B has had a proper grown up HAL since 777 and many think it is superior to the A model (certainly it came after and learned from it). From an engineering point of...
Forum: Rumours & News
24th Apr 2019, 10:51
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Correct, but there are multiple credible sources...

Correct, but there are multiple credible sources saying effectively the same thing. It was in point (1) of FCEng84's long clarification post earlier in thread: link...
Forum: Rumours & News
22nd Apr 2019, 16:30
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Pretty sure cross FCC bus is already there, not...

Pretty sure cross FCC bus is already there, not absolutely sure AOA is on it, but if not, adding it would be a lot different to creating entirely new bus.

MCAS could have been done with two AOA...
Forum: Rumours & News
16th Apr 2019, 18:05
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Also they had autopilot engaged. On LionAir...

Also they had autopilot engaged. On LionAir accident flight MCAS problems appeared to start with flaps up, on ET it was with autopilot disengage.

By the time of the ET flight it was known that...
Forum: Rumours & News
13th Apr 2019, 14:55
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Disagree. From the report: From the...

Disagree. From the report:



From the FDR traces, no electric trim command (autopilot or manual) is recorded between approx 05:41 and 05:43, therefore the above exchange can only be referring...
Forum: Rumours & News
9th Apr 2019, 14:31
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Sorry, with the greatest respect, I think you are...

Sorry, with the greatest respect, I think you are mistaken.

STS is not the autopilot, and it only operates with autopilot off, but it operates using the autopilot trim signal. It is therefore...
Forum: Rumours & News
9th Apr 2019, 12:58
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Only trim in the opposing direction is stopped,...

Only trim in the opposing direction is stopped, and all electric trim in the opposing direction is stopped. The only way to trim forward whilst pulling back would be manual trim wheel.

This is...
Forum: Rumours & News
9th Apr 2019, 12:47
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

It is the design of the warning rather than the...

It is the design of the warning rather than the purpose. Invalidating the sensor readings (speed and AOA) at the ADIRU is not a bad design (and might have saved ET302). Failure to consider the...
Forum: Rumours & News
8th Apr 2019, 21:15
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Pretty sure it is from the third set of...

Pretty sure it is from the third set of pitot/static sensors, without AOA correction - since there isn't a third AOA sensor.
Forum: Rumours & News
8th Apr 2019, 16:04
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

On that point - can you show where it is...

On that point - can you show where it is confirmed that they did have IAS disagree, because as far as I can see it isn't mentioned at all in the report.

IAS is divergent (expected as ADIRU does...
Forum: Rumours & News
5th Apr 2019, 14:45
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Autopilot engages, gear must be up for that to...

Autopilot engages, gear must be up for that to happen, no?
Forum: Rumours & News
4th Apr 2019, 19:38
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

I am struggling to see any effect, and I didn't...

I am struggling to see any effect, and I didn't see any other indication in the report that the crew re-engaged.

I suspect that cutout switch position is not directly recorded and has to be...
Forum: Rumours & News
4th Apr 2019, 17:19
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

It's a shame that Mentour Pilot took his video...

It's a shame that Mentour Pilot took his video down, I think it showed exactly what he meant (physically unable to move trim wheel), I also think their sim session was lower airspeed (310?).
Forum: Rumours & News
4th Apr 2019, 16:55
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

And in the maint log too - and like Lion all were...

And in the maint log too - and like Lion all were tested using BITE and found "ok".

I can't see that it is confirmed anywhere that they re-engaged electric trim
- FO called for stab trim cutout,...
Forum: Rumours & News
4th Apr 2019, 14:40
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Not quite the only thing - also Stick Shaker,...

Not quite the only thing - also Stick Shaker, elevator feel shift, IAS disagree and ALT disagree to deal with.

Regardless, there is a simple way of proving whether an average crew will be...
Forum: Rumours & News
4th Apr 2019, 11:54
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

OTOH: * build it all in a rush after being...

OTOH:

* build it all in a rush after being caught out by the competition
* while maxxed out on the rush job, expend some precious resources on changing stuff that didn't need to be changed...
Forum: Rumours & News
3rd Apr 2019, 23:24
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Mentour Pilot latest video

Since this video may not be coming back I'll post a sort of transcript from memory since I was lucky enough to get to watch it. I'll try and just describe what I saw and keep my...
Forum: Rumours & News
3rd Apr 2019, 17:55
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Disappeared while I was watching it I think -...

Disappeared while I was watching it I think - soon as I finished it I was going to comment and say something like "wow that cleared a lot up", but when it ended, it was just "unavailable".



He...
Forum: Rumours & News
1st Apr 2019, 15:57
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Careful, the function of STS is nothing to do...

Careful, the function of STS is nothing to do with avoiding stall (ditto MCAS), but the implementation does have an AOA input and does behave differently at high AOA.

Copy/pasting from the AMM (my...
Forum: Rumours & News
1st Apr 2019, 09:18
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

737 NG AMM says that the FDAU (flight data...

737 NG AMM says that the FDAU (flight data acquisition) gets AOA from the SMYD (stall management and yaw damper) and that analogue resolver outputs go to both SMYD and ADIRU (the latter feeds FCC).
...
Forum: Rumours & News
29th Mar 2019, 10:59
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

I think this may be right, but that it may also...

I think this may be right, but that it may also or instead be referring to the "stabilizer trim limit switches", note that "There are different limits for manual, autopilot, and for flaps up and...
Forum: Rumours & News
27th Mar 2019, 12:21
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

I've seen this in bits of the AMM that I have...

I've seen this in bits of the AMM that I have (annotated image attached):
Forum: Rumours & News
26th Mar 2019, 16:50
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

According to AMM info there certainly was in the...

According to AMM info there certainly was in the NG, specifically "stabilizer position" is shown as an input to the speed trim function. I don't see why it would have been removed, but I guess that...
Forum: Rumours & News
22nd Mar 2019, 14:56
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Not the former but I can give you an answer for...

Not the former but I can give you an answer for the latter - check FAA Master MEL here: http://fsims.faa.gov/wdocs/mmel/b-737-8_rev%200.pdf

I can't find any mention of MCAS or anything that might...
Forum: Rumours & News
21st Mar 2019, 14:20
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

One wonders if this means that: a) the sim...

One wonders if this means that:

a) the sim doesn't include an erroneous MCAS failure scenario
b) the sim doesn't include any failure scenario that would trigger MCAS
c) the sim does not...
Forum: Rumours & News
20th Mar 2019, 13:17
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

But the dive was clearly not arrested by the...

But the dive was clearly not arrested by the runaway stab trim procedure - the traces clearly show it is recovered and mcas continues to operate until cut-out some time later.

Prelim report says...
Forum: Rumours & News
18th Mar 2019, 10:58
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Interesting as I think Boeing described it as...

Interesting as I think Boeing described it as "mis-characterisation"... I thought (having less other info to corroborate it, I suspect) it was plausible and made sense, your clarification makes a...
Forum: Rumours & News
16th Mar 2019, 13:37
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Design Assurance Level assures the software is...

Design Assurance Level assures the software is working as designed, whatever level was used, I strongly suspect that the MCAS software is working exactly as designed.

In my opinion, the design (of...
Forum: Rumours & News
16th Mar 2019, 10:07
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

FCeng84 was referring to the column cutout...

FCeng84 was referring to the column cutout switches, which MCAS does override (it will trim nose down even when pilot is pulling up - unlike speed trim). The cutout switches on the throttle quadrant...
Forum: Rumours & News
15th Mar 2019, 16:34
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

This is the key I think, triggering MCAS only...

This is the key I think, triggering MCAS only when both FCCs (and therefore both AOAs) say so would surely be comparatively trivial and they would have done that IF the certification allowed it, ergo...
Forum: Rumours & News
15th Mar 2019, 14:41
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Maybe, maybe not. Remember, they did log...

Maybe, maybe not. Remember, they did log uncommanded trim movements ("STS trimming wrong" - remember they had no knowledge of MCAS even existing) and maintenance action was taken before the last...
Forum: Rumours & News
14th Mar 2019, 10:27
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

<cynic mode> First announcement for political...

<cynic mode> First announcement for political reasons (i.e. not France) then unavoidably changed to France for technical reasons?
Forum: Rumours & News
12th Mar 2019, 11:19
Replies: 5,109
Views: 13,432,459
Posted By infrequentflyer789

Surely the more pertinent question (at least for...

Surely the more pertinent question (at least for Lion Air) is: is it controllable with full forward trim and EFS activated. If it is, is it a two hands on the column job or a four hands on both...
Showing results 1 to 35 of 35


 
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