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Search: Posts Made By: Mad (Flt) Scientist
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Forum: Rumours & News
6th Dec 2018, 20:21
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

B-737-8/9 MMEL on FAA website (rev 1, Jan 2018)...

B-737-8/9 MMEL on FAA website (rev 1, Jan 2018) only mentions AOA heater as related MMEL option; AOA sensor itself does not appear on MMEL. (Based on a few search terms)
Forum: Rumours & News
6th Dec 2018, 14:53
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

Something I'd not noticed before on that FDR data...

Something I'd not noticed before on that FDR data - not sure it's been remarked on. At the VERY end of the trace, the stab is seen to apparently move a long way back towards to trim state. Given the...
Forum: Rumours & News
5th Dec 2018, 20:42
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

Even assuming you did that - and I am sure they...

Even assuming you did that - and I am sure they did do the corresponding analysis, we can argue about "properly" - you'd still be left with determining the hazard classification.

I rather believe...
Forum: Rumours & News
5th Dec 2018, 18:53
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

It's two subtly but significantly different...

It's two subtly but significantly different statements.

that attributed to Boeing - "pilots weren’t ever likely to encounter" sounds like the kind of wording used in failures assessment guidance....
Forum: Rumours & News
5th Dec 2018, 16:56
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

That's my assumption from what I've read; there...

That's my assumption from what I've read; there is considerable industry concern over this kind of scenario following some incidents and I would not be surprised if boeing, FAA, or both were trying...
Forum: Rumours & News
4th Dec 2018, 15:35
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

Must be able to do so, otherwise the whole basis...

Must be able to do so, otherwise the whole basis of the stall certification would have changed, as it would make the aircraft "envelope protected" if MCAS were able to prevent a stall. AFAIK 737MAX...
Forum: Rumours & News
1st Dec 2018, 15:03
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

re stick "nudgers" and stick pushers Stick...

re stick "nudgers" and stick pushers

Stick pushers are sometimes fitted when there are "stability issues approaching the stall" - in such a case, though, in order to fix such issues the pusher...
Forum: Rumours & News
30th Nov 2018, 15:36
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

MCAS is active during stall-type conditions. Sim...

MCAS is active during stall-type conditions. Sim qualification includes modelling and matching stalls. So I would expect all sims to include the relevant effects. (But perhaps modelled as a bit of a...
Forum: Rumours & News
29th Nov 2018, 02:59
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

From the peanut gallery, sort-of, not totally...

From the peanut gallery, sort-of, not totally 100%.

MCAS appears designed to give assistance to using the elevator to recover from a high AoA condition. Likely the scenario for which it is...
Forum: Rumours & News
28th Nov 2018, 20:18
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

The FDR doesn't record manual trim input if its...

The FDR doesn't record manual trim input if its you moving the trim wheel by hand. What it records are trim switch inputs.

What I think you are seeing is the stab moving in response to the wheel,...
Forum: Rumours & News
22nd Nov 2018, 16:59
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

looks like FDR data, typical "flightscape" plot...

looks like FDR data, typical "flightscape" plot format. One plot looks like it's the previous flight (since it shows flaps being deployed and then speed dropping off on landing as you'd expect)
...
Forum: Rumours & News
20th Nov 2018, 20:39
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

Actually, that doesn't quite seem to be the case....

Actually, that doesn't quite seem to be the case. From the reported characteristics (speed of trimming, limited authority, etc.) it's nowhere near what i would consider a stall prevention device -...
Forum: Rumours & News
15th Nov 2018, 20:30
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

You might, and you might think you had everything...

You might, and you might think you had everything resolved once you had restored roughly level flight. But if the fault is still there, then as soon as you think you are safely trimmed in level...
Forum: Rumours & News
15th Nov 2018, 03:28
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

A question was posted a couple of pages ago,...

A question was posted a couple of pages ago, asking who defined an "average pilot", taking issue with the "tone" of the Boeing statement about not giving too much info to said "average pilot" and...
Forum: Rumours & News
6th Nov 2018, 18:01
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

Thanks, I'm not even remotely able to keep up...

Thanks, I'm not even remotely able to keep up with the info.

Has it been definitively stated that is was the three immediately preceding flights? if it were intermittent over a longer period...
Forum: Rumours & News
6th Nov 2018, 16:56
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

I don't think we know exactly what is stated...

I don't think we know exactly what is stated here.We 'know' from statements apparently based on initial FDR data (?) that three (immediately?) previous flights showed URA (UAS) tendencies. We don't...
Forum: Rumours & News
1st Nov 2018, 16:45
Replies: 2,099
Views: 1,471,742
Posted By Mad (Flt) Scientist

Not that absurd. (And not unique to B737...

Not that absurd. (And not unique to B737 either...)

Part 25 regs require that there be a minimum stick force "per knot" (actually, per 6 knots, to be pedantic) to change speed from the trim...
Showing results 1 to 17 of 17


 
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