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Search: Posts Made By: Ian W
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Forum: Rumours & News
25th Dec 2018, 17:01
Replies: 2,099
Views: 1,471,742
Posted By Ian W

Find a WSJ reporter who understands what an AoA...

Find a WSJ reporter who understands what an AoA vane is.
I think you will find they meant that the AoA vane was incorrectly calibrated. That would certainly fit with the symptoms of the crash...
Forum: Rumours & News
6th Dec 2018, 14:25
Replies: 2,099
Views: 1,471,742
Posted By Ian W

The ratchet effect exists - and is very apparent...

The ratchet effect exists - and is very apparent from the post of the FDR permalink here to post...
Forum: Rumours & News
5th Dec 2018, 14:31
Replies: 2,099
Views: 1,471,742
Posted By Ian W

That is an interesting set of statements. So...

That is an interesting set of statements.

So MCAS gets reset when there is a pilot 'electric' trim - so the first series of trim events we see from the pilot is to return the trim to the wanted...
Forum: Rumours & News
3rd Dec 2018, 23:17
Replies: 2,099
Views: 1,471,742
Posted By Ian W

Just think how useful a streamed copy of the CVR...

Just think how useful a streamed copy of the CVR would have been. How much money would have been saved. How much contentious discussion.
But no - stay with an antediluvian approach that almost...
Forum: Rumours & News
29th Nov 2018, 13:51
Replies: 2,099
Views: 1,471,742
Posted By Ian W

A little strong. If your automatic stab trim is...

A little strong.
If your automatic stab trim is trimming down when you don't want it to. And even after you trim back up it starts trimming nose down again. and you repeat the sequence a couple...
Forum: Rumours & News
28th Nov 2018, 12:59
Replies: 2,099
Views: 1,471,742
Posted By Ian W

I didn't realize that parsing words was one of...

I didn't realize that parsing words was one of the memory items. <<thinks> "The trim keeps on trimming nose down, but if I trim nose up it stops. But that cannot be a trim runaway as runaway means...
Forum: Rumours & News
27th Nov 2018, 13:43
Replies: 2,099
Views: 1,471,742
Posted By Ian W

I don't think that you can say that anymore than...

I don't think that you can say that anymore than you can say that the ADIRUs that gave UAS indications due to the same AOA vane fault and caused the FMS to remain unengaged were a causal factor., ...
Forum: Rumours & News
21st Nov 2018, 12:47
Replies: 2,099
Views: 1,471,742
Posted By Ian W

That is the issue that I do not understand. PF...

That is the issue that I do not understand.
PF is flying manually in vmc with all non-pressure instruments serviceable and has things set up and while going through memory items for UAS the...
Forum: Rumours & News
20th Nov 2018, 19:50
Replies: 2,099
Views: 1,471,742
Posted By Ian W

A lot of data is already streamed and both A and...

A lot of data is already streamed and both A and B are moving to 'connected' aircraft so sending data on a connection oriented always on broadband link should not be a problem.
A benefit is the...
Forum: Rumours & News
20th Nov 2018, 13:57
Replies: 2,099
Views: 1,471,742
Posted By Ian W

But up until that point of total LOC even the...

But up until that point of total LOC even the standard SatCom antennae would be streaming normally. So in the Indonesian case all bar the final dive and perhaps most of that would be captured. In...
Forum: Rumours & News
20th Nov 2018, 12:27
Replies: 2,099
Views: 1,471,742
Posted By Ian W

Nothing to do with Indonesia - it is the...

Nothing to do with Indonesia - it is the lackadaisical aviation industry way of dealing with disasters. There is no technical reason why CVR and for that matter DFDR data cannot be streamed into...
Forum: Rumours & News
16th Nov 2018, 10:31
Replies: 2,099
Views: 1,471,742
Posted By Ian W

If the AOA on the 'standby' side fails - that is...

If the AOA on the 'standby' side fails - that is the one that is not feeding the MCAS then the result is a UAS because the ADIRUS are fed by both. When a technician gets a UAS report from the crew...
Forum: Rumours & News
15th Nov 2018, 13:24
Replies: 2,099
Views: 1,471,742
Posted By Ian W

I think that a point has been missed that is to...

I think that a point has been missed that is to do with the apparent architecture of the system.

1, An AOA disagree causes the ADIRUs to have problems and leads to Unreliable Airspeed...
Forum: Rumours & News
9th Nov 2018, 19:31
Replies: 2,099
Views: 1,471,742
Posted By Ian W

It is necessary to go back to the principle of...

It is necessary to go back to the principle of FMC/FMS and avionics design. There are pilots on board and the FMC/FMS avionics is intended to make their life simpler. There is a significant cost in...
Forum: Rumours & News
7th Nov 2018, 19:23
Replies: 2,099
Views: 1,471,742
Posted By Ian W

Perhaps it is being picky, but a trim that...

Perhaps it is being picky, but a trim that operates until overridden by pilot input, waits a few seconds and does it again is not 'runaway' as it can be prevented and most pilots would operate the...
Forum: Rumours & News
4th Nov 2018, 16:57
Replies: 2,099
Views: 1,471,742
Posted By Ian W

'The computer' (possibly several all working...

'The computer' (possibly several all working together in a network) already knows that there is a problem with the pressure instruments as the symptoms are reasonably obvious and can be diagnosed 'by...
Forum: Rumours & News
31st Oct 2018, 20:51
Replies: 2,099
Views: 1,471,742
Posted By Ian W

From way back in the thread So let us...

From way back in the thread



So let us assume that is the case and the advice given here was not followed the aircraft is in almost level flight at 5000ft with mud wasp nests (or whatever) in...
Showing results 1 to 17 of 17


 
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