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Search: Posts Made By: LDRA
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Forum: Rumours & News
19th Mar 2019, 16:51
Replies: 5,109
Views: 13,193,171
Posted By LDRA

Wouldn't you also always get nose down trim from...

Wouldn't you also always get nose down trim from STS if you are decelerating?

It doesn't even need to be actually decelerating, just need air speed indication system to indicate deceleration, as...
Forum: Rumours & News
19th Mar 2019, 16:23
Replies: 5,109
Views: 13,193,171
Posted By LDRA

STS always asserts unwanted trim input by design....

STS always asserts unwanted trim input by design.

Is there any cockpit indication of what system(STS, Mach, MCAS) is actually commanding trim movement? If not, how does one reliably tell it is...
Forum: Rumours & News
19th Mar 2019, 15:07
Replies: 908
Views: 1,095,092
Posted By LDRA

Excellent diagram! I am curious what is the...

Excellent diagram!

I am curious what is the current AOA DISAGREE warning threshold.? I read online it is set to10degrees difference between two AoA vanes? If that is the case, and if MCAS onset...
Forum: Rumours & News
17th Mar 2019, 19:51
Replies: 5,109
Views: 13,193,171
Posted By LDRA

Wonder if stick shaker noise will mask trim wheel...

Wonder if stick shaker noise will mask trim wheel clicking
Forum: Rumours & News
13th Mar 2019, 17:58
Replies: 108
Views: 112,685
Posted By LDRA

Both AA and WN have AoA disagree indicator and...

Both AA and WN have AoA disagree indicator and AoA display. So the risk is reduced to acceptable level that grounding is not necessary
Forum: Rumours & News
10th Mar 2019, 22:56
Replies: 5,109
Views: 13,193,171
Posted By LDRA

The MCAS AD came out 6 monthes ago. It was...

The MCAS AD came out 6 monthes ago. It was supposed to be an interim measure with software change to permanently resolved the issue coming Jan 2019. The software update to permanently address the...
Forum: Rumours & News
13th Feb 2019, 00:32
Replies: 908
Views: 1,095,092
Posted By LDRA

But MCAS takes ~10secs to trim one increment....

But MCAS takes ~10secs to trim one increment. Maybe the non-linearity in column to AoA response only occur at low pitch rate?
Forum: Rumours & News
13th Feb 2019, 00:10
Replies: 908
Views: 1,095,092
Posted By LDRA

Speculation: Put limit on how much MCAS can...

Speculation: Put limit on how much MCAS can command nose down trim. If MCAS trim authority is limited, they can argue aircraft controllable

Edit: Come to think of it, they may be able to get rid...
Forum: Rumours & News
5th Dec 2018, 20:57
Replies: 2,099
Views: 1,471,078
Posted By LDRA

Agreed, except "pre-existing procedure" implies...

Agreed, except "pre-existing procedure" implies there are defined criteria for DETECTING failure condition, which does not exist before the FAA AD came out. Even with the FAA AD, the flight crew...
Forum: Rumours & News
5th Dec 2018, 19:43
Replies: 2,099
Views: 1,471,078
Posted By LDRA

Fair enough. But if they actually did failure...

Fair enough. But if they actually did failure analysis and quantified failure rates properly, like they are supposed to, it would have been glaring obvious the "unintended activation" has a high...
Forum: Rumours & News
5th Dec 2018, 17:45
Replies: 2,099
Views: 1,471,078
Posted By LDRA

Disturbing statement, shows lack of safety...

Disturbing statement, shows lack of safety culture and lack of understanding of how safety works.

If the safety system will never be used, why develop and install in production aircraft in first...
Forum: Rumours & News
3rd Dec 2018, 18:38
Replies: 2,099
Views: 1,471,078
Posted By LDRA

Bergerie1; Silverstrata, I heard it is...

Bergerie1; Silverstrata,

I heard it is Part25.203a that 737 Max is having issue with, and MCAS to meet requirements
Forum: Rumours & News
15th Nov 2018, 17:52
Replies: 2,099
Views: 1,471,078
Posted By LDRA

It is quite bit more than shaky. The way the...

It is quite bit more than shaky.

The way the system is architectured means if the AOA on standby side fails, it may be undetected and henced unfixed, since it is not used for function. The failure...
Forum: Rumours & News
14th Nov 2018, 23:00
Replies: 2,099
Views: 1,471,078
Posted By LDRA

Good find I just read through section...

Good find

I just read through section 25.672, if MCAS falls under this section, Boeing is in deep trouble. MCAS fails every.single.clause in this section! There wouldn't be simple fix...
Forum: Rumours & News
14th Nov 2018, 17:15
Replies: 2,099
Views: 1,471,078
Posted By LDRA

Rananim; MCAS pitch control authority might...

Rananim;

MCAS pitch control authority might be different than STS, especially if MCAS false activate at high speed using high trim rate.

Existing runaway trim procedure may or may not be...
Showing results 1 to 15 of 15


 
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