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Search: Posts Made By: rudderrudderrat
Showing results 1 to 35 of 55
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Forum: Tech Log
1st Nov 2011, 22:16
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, FCOM: DSC Aircraft Systems,...

Hi DozyWannabe,

FCOM: DSC Aircraft Systems, 27, 20, Alternate Law:
"In addition, audio stall warnings (crickets + “STALL” synthetic voice message) is activated at an appropriate margin from the...
Forum: Tech Log
21st Oct 2011, 11:47
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi RetiredF4 Like this one? Airbus...

Hi RetiredF4


Like this one?
Airbus backs up speed and altitude displays (http://www.flightglobal.com/news/articles/airbus-backs-up-speed-and-altitude-displays-205645/)
Forum: Tech Log
14th Oct 2011, 09:08
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Dani, It's more than a strong guess - it's...

Hi Dani,
It's more than a strong guess - it's reported on page 74:
"The Flight Directors were not disengaged by the crew, but the crossbars disappeared."

If I was flying at 02:00 and with all...
Forum: Tech Log
13th Oct 2011, 10:16
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Narval, The only aircraft I know which did...

Hi Narval,
The only aircraft I know which did that was the L1011 during an Auto Land Approach. (AL selected)
Every other aircraft I've flown, when the AP drops out, remains in trim and continues...
Forum: Tech Log
12th Oct 2011, 08:31
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi jcjeant, 99.99% of the PF's manual flying...

Hi jcjeant,

99.99% of the PF's manual flying experience will have been in Normal Law, where stick deflection controls a roll rate independent of air speed. When he was faced with ALT Law, he had...
Forum: Tech Log
11th Oct 2011, 07:33
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Turbine D, It seems to me that PF may...

Hi Turbine D,

It seems to me that PF may have simply memorised 3 attitudes and power settings, and forgotten the "Below Thrust Reduction Alt" bit.
Once he had selected TOGA power, then he placed...
Forum: Tech Log
3rd Oct 2011, 10:12
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Correct. That's why the stab trim was allowed to...

Correct. That's why the stab trim was allowed to continue trimming.
In Alt Law, with side stick free - the FBW computers will continue to move the elevators whilst attempting to hold the attitude...
Forum: Tech Log
2nd Oct 2011, 21:14
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, The first two reasons you...

Hi DozyWannabe,

The first two reasons you quote would make every conventional aircraft impossibly difficult to fly.
The real reason is as Tyropicard pointed out a long while back - How would you...
Forum: Tech Log
1st Oct 2011, 09:09
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, We never distrusted the...

Hi DozyWannabe,

We never distrusted the technology - but were ready to take over when it failed. When it failed and the AP dropped out, the aircraft felt very familiar because it only had the one...
Forum: Tech Log
16th Sep 2011, 20:42
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Clandestino, Please explain how a ROD of...

Hi Clandestino,

Please explain how a ROD of 10,000 per min (about 98 kts) is not sufficient to validate the stall warning.
The invalid <60 kt logic must was meant for on ground nuisance warnings....
Forum: Tech Log
14th Sep 2011, 14:28
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, I agree. In the cold light...

Hi DozyWannabe,

I agree.
In the cold light of day and in an arm chair - that's an easy question to answer.

However, you believed one should never hear an overspeed warning when in Normal Law -...
Forum: Tech Log
14th Sep 2011, 12:47
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, Do you mean - a clue that...

Hi DozyWannabe,

Do you mean - a clue that the Captain thought they were no longer stalled?
In Normal Law & with the AP engaged, if you are higher than ideal profile, and select Managed Descent...
Forum: Tech Log
12th Sep 2011, 14:21
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi CONfiture, I think IF789 was joking at...

Hi CONfiture,

I think IF789 was joking at the language translation.

If you are stalled, then the warning can not possibly be permanent, because if AOA is not recovered, then the crash would...
Forum: Tech Log
10th Sep 2011, 22:46
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

That will be all the false stall warnings...

That will be all the false stall warnings received at 59 kts and below.
Forum: Tech Log
10th Sep 2011, 11:16
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, Thanks for the reply - I...

Hi DozyWannabe,

Thanks for the reply - I think we are talking at crossed tortoises.


Do we agree that it is impossible for a passenger airliner to be at FL 350 with an airflow <60kts passing...
Forum: Tech Log
9th Sep 2011, 07:28
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, The two co-pilots didn't...

Hi DozyWannabe,

The two co-pilots didn't hear / recognise / believe / admit (any of those) the stall and insisted on applying TOGA 15 degs pitch throughout the stall warning.
When the Captain...
Forum: Tech Log
8th Sep 2011, 23:13
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

@Clandestino, Page 76. "Until the end...

@Clandestino,


Page 76.
"Until the end of the flight, the angle of attack values became successively valid and invalid. Each time that at least one value became valid, the stall warning...
Forum: Tech Log
8th Sep 2011, 13:57
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Clandestino, If you look at page 111 of...

Hi Clandestino,

If you look at page 111 of the report, at time 02:10:15, the computed IAS was about 50 kts, the ISIS was 280 then fell rapidly to about 50 kts. The aircraft was still flying...
Forum: Tech Log
8th Sep 2011, 09:00
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Gums, I agree with you and Ian W - simple...

Hi Gums,

I agree with you and Ian W - simple WOW logic for stall warning activation.
If I'm airborne - I want to know if the angle of attack is excessive no matter what my indicated air speed...
Forum: Tech Log
7th Sep 2011, 16:31
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Thanks jcjeant, "The BEA is to establish the...

Thanks jcjeant,

"The BEA is to establish the working group "Human factors" whose creation was announced at the publication of the third progress report of investigation into the accident flight...
Forum: Tech Log
7th Sep 2011, 06:27
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Clandestino, In Post #751, I...

Hi Clandestino,



In Post #751, I mentioned 3 QRH procedures which specify the use of Full Back Stick. It is not mentioned anywhere that the "piloting technique" of respecting Alpha Max should...
Forum: Tech Log
4th Sep 2011, 09:07
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Full Back Stick

There are a several QRH procedures that call for Full Back Stick.
WIND SHEAR:
SRS ORDERS .... FOLLOW
This includes the use of full back stick if demanded.
If the FD Bars are not available , use...
Forum: Tech Log
3rd Sep 2011, 13:22
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Ian W I don't know the physics of stalled...

Hi Ian W

I don't know the physics of stalled aircraft behaviour, but I think the stability was a result of dihedral rather than sweep.

When stalled, if one wing is lower, it presents a greater...
Forum: Tech Log
2nd Sep 2011, 23:20
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi OK465, DW, henra, Unless the aircraft was...

Hi OK465, DW, henra,

Unless the aircraft was trimmed exactly to balance any asymmetric thrust (due TL moved in response to thrust lock), it would tend to roll one way and continue to roll, unless...
Forum: Tech Log
2nd Sep 2011, 16:52
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi xcitation, If he'd done that - it would...

Hi xcitation,

If he'd done that - it would have continued to roll right wing down until it was inverted.
They were struggling to keep the wings level in ALT LAW from the outset.
Forum: Tech Log
1st Sep 2011, 10:29
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Clandestino, Then why did the...

Hi Clandestino,




Then why did the QRH have "EGPWS ALERTS" in the Emergency Procedures?
Using your logic - you would think that "Pull Up" before hitting the ground and apply TOGA power would...
Forum: Tech Log
1st Sep 2011, 08:06
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi Clandestino, The most important...

Hi Clandestino,


The most important warning on that flight deck was "Stall Stall" - which appears to have been ignored / not acknowledged / not heard. (Similar to the You Tube "What's that...
Forum: Tech Log
31st Aug 2011, 13:18
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

human cognitive limitations

Hi Clandestino,

You will have had cognitive overload on many occasions - but probably have not realised it. Have you never missed an RT call?

These pilots are suffering from cognitive overload...
Forum: Tech Log
30th Aug 2011, 09:49
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, under certain...

Hi DozyWannabe,


under certain circumstances like direct law - yes. Otherwise conventional aircraft would have adopted side stick controls for weight saving and reduced engineering complexity...
Forum: Tech Log
30th Aug 2011, 08:27
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Good Morning DW, All the hand flying...

Good Morning DW,

All the hand flying practice will have been done from the co-pilot's natural position (RHS). During cruise relief, when seated in the LHS - all inputs will have done through the...
Forum: Tech Log
30th Aug 2011, 07:38
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, I've never heard of that....

Hi DozyWannabe,


I've never heard of that.
PF / PNF can swap roles at any time - usually one crew member is allocated the pleasure of doing the take off and landing for his records. Unusually...
Forum: Tech Log
29th Aug 2011, 23:04
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozyWannabe, PF takes manual control...

Hi DozyWannabe,


PF takes manual control at 2.10.06.
From 2.10.7 - 18
"The copilot sidestick is positioned:
- nose-up between neutral and ¾ of the stop position
- to the left in half-travel...
Forum: Tech Log
29th Aug 2011, 09:48
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi DozzyWannabe & IanW, I agree with both...

Hi DozzyWannabe & IanW,

I agree with both your posts and believe it points to another couple of holes in the cheese lining up.

The auditory overload of ALT Alert, ECAM Dings, "Read ECAM" etc....
Forum: Tech Log
27th Aug 2011, 10:15
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi JD-EE, Good question. If the...

Hi JD-EE,

Good question.

If the Autopilot could have remained engaged controlling both pitch and roll - but with a Health Warning such as "ATT", then it would have freed up more brain cells. ...
Forum: Tech Log
27th Aug 2011, 09:31
Replies: 1,688
Views: 407,707
Posted By rudderrudderrat

Hi JD-EE, I disagree. He would know that...

Hi JD-EE,

I disagree.
He would know that with a nose up attitude around 15 degs that the sensation on his back felt normal. Most of the time he held around 15 degs pitch - they didn't exceed 20...
Showing results 1 to 35 of 55
 
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