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Search: Posts Made By: Mad (Flt) Scientist
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12th Jun 2019, 20:24
Replies: 1,423
Views: 1,025,016

In that context, note the warning about post...

In that context, note the warning about post anonymity stickied at the top of the forum. None of us are REALLY anonymous.

And if "we" can "guess" someone's general work role, someone who KNOWS...
7th Jun 2019, 22:02
Replies: 2
Views: 1,920

Jettisoning load isn't really throwing away...

Jettisoning load isn't really throwing away energy, because the load will also consume energy in a proprtional sense.

Consider your answer for b - trade speed for height. Speed gives kinetic...
Forum: Tech Log
7th Jun 2019, 21:53
Replies: 6
Views: 2,046

MEL cases must be "fully certifiable" and comply...

MEL cases must be "fully certifiable" and comply with everything in part 25. It's effectively a new version of the same aircraft that has a difference in equipment, and must meet all the rules.
...
Forum: Tech Log
6th Jun 2019, 18:22
Replies: 17
Views: 2,854

Dangerously accurate (and validated by this post!)

Dangerously accurate (and validated by this post!)
16th May 2019, 13:55
Replies: 185
Views: 128,452

From the reports it seems that the FAA guy did...

From the reports it seems that the FAA guy did his best to handle some very "leading" and biased questions. Given that FAA has in the past raised issues of international standards (as also has EASA,...
15th May 2019, 02:57
Replies: 1
Views: 1,278

Truly bizarre that that BBC article references...

Truly bizarre that that BBC article references two incidents last year, but not the rather more serious one only a few weeks ago. (Which has a thread or two of its own on here)

Oh, wait, no-one...
Forum: Tech Log
10th May 2019, 13:43
Replies: 6
Views: 2,149

Yes, Principally aircraft with lower than typical...

Yes, Principally aircraft with lower than typical jet rotation speeds. Because the fluid flow-off characteristics are determined with a generic speed ramp test (but ul;timately tracing back to the...
Forum: Tech Log
9th May 2019, 15:07
Replies: 9
Views: 2,278

Could the original question actually perhaps...

Could the original question actually perhaps relate to CDL not MEL? While MEL does indeed typically put specific "interoperability" crietria against each item, showing which may be combined...
Forum: Tech Log
8th May 2019, 20:12
Replies: 9
Views: 2,278

There's absolutely no guarantee of that, without...

There's absolutely no guarantee of that, without knowing precisely what the RTOW penalty is intended to achieve for each case. If all three defects have an impact on climb capability, then they may...
8th May 2019, 14:40
Replies: 138
Views: 61,120

The point of rebriefing something is to ensure...

The point of rebriefing something is to ensure that you actually do remember it. The fact that you heard it once, years ago, does NOT mean that you will actually recall it now.

Or are you...
7th May 2019, 13:56
Replies: 27
Views: 13,213

I assume you mean "CRJ" there. That aircraft...

I assume you mean "CRJ" there.

That aircraft did not "come straight down". The crew recovered control but were unable to restart either engine, and came down in houses some distance short of the...
Forum: Tech Log
1st May 2019, 20:52
Replies: 1
Views: 858

Can't answer to the very specific questions on...

Can't answer to the very specific questions on the specified types, but as a general answer to your last question: while the general philosophy for airspeed indication can't be TOO different, since...
26th Apr 2019, 17:17
Replies: 74
Views: 53,238

That bit in bold is nonsense, as the synoptic...

That bit in bold is nonsense, as the synoptic display posted in post #22 shows - all spoiler panels are depicted individually on the display.
25th Apr 2019, 21:58
Replies: 9
Views: 2,472

Often "units" may be used instead of degrees for...

Often "units" may be used instead of degrees for simplicity and robustness of a display.

To take another example, on aircraft where the trimmable stab range varies over the positive and negative...
16th Apr 2019, 15:05
Replies: 74
Views: 53,238

The RH wing spoilerons are UP. The LH wing...

The RH wing spoilerons are UP. The LH wing aileron is I believe DOWN i.e. in agreement with the spoilerons - both are acting to roll the aircraft right wing down.

The LH aileron looks T/E "UP" if...
15th Mar 2019, 04:26
Replies: 5,129
Views: 10,180,438

What if they were so concerned about MCAS that...

What if they were so concerned about MCAS that they were taking THOSE actions even though it wasn't an MCAS issue? And not addressing the thrust?

Ive seen previous cases where crews were so...
15th Mar 2019, 03:38
Replies: 5,129
Views: 10,180,438

Something isn't quite making sense here.... ...

Something isn't quite making sense here....

IF that supposed ATC info is correct - that there seemed to be a sustained and abnormal acceleration - and this DOES seem to be borne out by the FR24...
12th Mar 2019, 13:34
Replies: 5,129
Views: 10,180,438

That statement isn't there for "erroneous MCAS"....

That statement isn't there for "erroneous MCAS". If the MCAS has "gone crazy" due to either faulty inputs and/or internal fault in whatever box drives it, then you can assume that the stab drive...
4th Mar 2019, 19:37
Replies: 49
Views: 36,933

The airport authority appears to have responded...

The airport authority appears to have responded to the video as if it were real (or at least, without questioning whether it is real) - and commenting on one of the people in the video as a...
Forum: Questions
27th Feb 2019, 16:50
Replies: 2
Views: 605

There was a major rewrite of part 23 last year....

There was a major rewrite of part 23 last year. Most of the old regulations are now either as guidance, or ASTM, or some other "advisory" text somewhere. Although the FAA can have a tendency of...
22nd Feb 2019, 15:07
Replies: 908
Views: 930,445

With regard to the somewhat semantic debate as to...

With regard to the somewhat semantic debate as to whether "stab runaway" applied or not, it might be good to not just look at the title of the procedure, but also at any additional information or...
Forum: Tech Log
19th Feb 2019, 20:00
Replies: 22
Views: 4,075

It could well be from a non-test analysis with a...

It could well be from a non-test analysis with a suitable dollop of conservatism. Not everything on MMEL gets flight tested.
15th Feb 2019, 19:50
Replies: 908
Views: 930,445

safetypee But even after they got into "MCAS...

safetypee But even after they got into "MCAS difficulties" they seem to have retained a reasonable degree of control initially. It wasn't a case of "the MCAS thing happened and there was immediate...
15th Feb 2019, 16:50
Replies: 908
Views: 930,445

That's a somewhat selective quote from 25.672(a)....

That's a somewhat selective quote from 25.672(a). The text in full (current issue, it is not unlikely that the aircraft cert basis is in fact different) is:


the requirement to provide a warning...
Forum: Tech Log
26th Jan 2019, 21:17
Replies: 37
Views: 6,377

For the FAA, AC 23.131-1C para 17.4 and AC25-11b...

For the FAA, AC 23.131-1C para 17.4 and AC25-11b (more tangentially in a couple of places) both discuss "decluttering" displays when in unusual attitudes (I think there's another AC which parallels...
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