Another CRJ tech questions (2)

[xcr600]

Ok so Stall Switch is selected off, will you still get stall lights and cont ignition? I would think so but I dont know so.

Also,
Aux gear extension does this just unlock the MLG or is there another hyd cylinder within the main extension cylinder to actually extend the gear using sys 2 pressure? I have had this explained to me both ways??

thanks

 

[Texx]

Ok so Stall Switch is selected off, will you still get stall lights and cont ignition? I would think so but I dont know so.

Also,
Aux gear extension does this just unlock the MLG or is there another hyd cylinder within the main extension cylinder to actually extend the gear using sys 2 pressure? I have had this explained to me both ways??

thanks

Yes and yes but not sure on the system 2 hyd..

 

[DoinTime]

Ok so Stall Switch is selected off, will you still get stall lights and cont ignition? I would think so but I dont know so.

The CRJ does not have a "stall switch." If you are referring to the stick pusher on/off switch all stall systems remain functional except for pusher actuation when tuned off.

Also,
Aux gear extension does this just unlock the MLG or is there another hyd cylinder within the main extension cylinder to actually extend the gear using sys 2 pressure? I have had this explained to me both ways??

The MLG auxiliary actuator is powered by hydraulic system 3.

 

[Rogue5]

The MLG auxiliary actuator is powered by hydraulic system 3.

Negatory.

It's HYD 2.

Check it out next time you pull up the HYD synoptic page...

 

[DoinTime]

Negatory.

It's HYD 2.

Check it out next time you pull up the HYD synoptic page...

Correct....I was envisioning the page and the MLG Aux Act is located in the third column. I equated that with system 3 but it is actually system 2. Thanks for the catch!

 

[nethan]

Canadian logic says the systems should be set up according to functionality, not layout. Go figure.

 

[logolight]

Remember, you can disable the stick pusher by pressing and holding the auto pilot disconnect switch on the control yoke.

 

[wil]

Hey Logo- Can you on the F.O. side? No, it only slows the pusher rate but does not cancel. Sorry to be a butt, ha,ha!

 

[IdRtherBsailing]

Remember, you can disable the stick pusher by pressing and holding the auto pilot disconnect switch on the control yoke.

Thats a great trick while doing your PC. Should you get the stick pusher that really bones up the rest of the maneuver in the sim.

 

[IdRtherBsailing]

Hey Logo- Can you on the F.O. side? No, it only slows the pusher rate but does not cancel. Sorry to be a butt, ha,ha!

I do it on the FO side and the pusher does not happen.

 

[logolight]

Hey Logo- Can you on the F.O. side? No, it only slows the pusher rate but does not cancel. Sorry to be a butt, ha,ha!

That's incorrect. Yes it does cancel the stick pusher completely. Who told you that?

 

[PeanuckleCRJ]

The FO's side doesn't make the yoke bounce back like the captain's does... it just allows you to overpower it. The CA's side fully cancels the pusher.


The Aux gear extension is system 2. Something about it forcing it the rest of the way to lock coming from system 3 though seems to come to mind... dont have my systems manual with me on this trip.


There is no stall switch, just the stick pusher on/off switch on each side. With that selected off, all that you will get is a "STALL FAIL" caution message.

Are you asking about the stall test switchlight?

 

[PunchTheClown]

Logo, I think your right. Its the same system on each side.

 

[xcr600]

Yes I was refering to the stick pusher switch on the side panel. What is the deal with the FOs side being different from the Capts? I though either switch did the same thing, completly remove the stick pusher and shaker?

We still dont have a good answer for the MLG AUX extension system........I still think it somehow powers the gear down unlike the nose system.

 

[PCL_128]

The AP/SP disconnect SW works the same on both sides. From the Pinnacle FCOM I: (bold emphasis is mine)

The stick pusher may be stopped by pressing and holding the autopilot stick pusher disconnect switch (AP/SP DISC), on the CAs or FOs control wheel. The stick pusher is capable of operating immediately once the autopilot/stick pusher disconnect switch is released. In the event of a malfunction, the stick pusher may be disconnected by selecting the PUSHER switch to OFF on the CA's or FO's stall protection panel. Both switches must be ON for stick pusher activation.

 

[BOHICAgain]

The AP/SP disconnect SW works the same on both sides. From the Pinnacle FCOM I: (bold emphasis is mine)

You might be right and the FCOM 1 might be right.. BUT FCOM 1 is the worst manual ever in the history of manuals... barely helped during initial...had to use a Check Air. notes to learn about the systems

 

[PeanuckleCRJ]

There are multiple blatant errors in the electrical section when I was looking through it the other day...


Disregard my thing about system three on the aux extension... it's all system 2. It free falls and the hydraulic system 2 forces it into locking.

 

[PCL_128]

There are multiple blatant errors in the electrical section when I was looking through it the other day...

Have you put in the revisions they've put out since you got your book initially? The book still isn't the best (I prefer the old fashioned way of learning how to practically build the plane), but it's pretty accurate. I can't remember anything incorrect in there from when I went to upgrade last year. It just doesn't have as much info as I'd like.

 

[mullet]

WHOOP-
WHOOP-

NERD
ALERT !!!!!!!!!!!!!!

 

[PCL_128]

WHOOP-
WHOOP-

NERD
ALERT !!!!!!!!!!!!!!

Yeah, yeah. I know.

 

[xcr600]

it's all system 2. It free falls and the hydraulic system 2 forces it into locking.

Ok so how does it force it into locking? Would that the the fabled cylinder within the main cylinder I have heard about.

ha......I just noticed the add in the upper right corner of this page has a $695 pinnacle prep class! I did that interview one time it was CAKE why would you need that. And yes I got the job I turned it down though.

edit: Ok you have got to go to that website not only can you get the PNCL prep you can also get a beauty pageant prep while you are there......am I pretty enough??????? http://www.emeraldcoastinterviewconsulting.com/

 

[SpoilerFault]

The CRJ MLG is driven to the down and locked position during an alternate extension with the aid of the downlock assist actuator. This is a seperate actuator that is connected at the top of the gear fitting and during normal operation just moves freely with the gear but during the Emerg. Ext has #2 hyd system pressure routed to it via the downlock assist actuator selector valve. This actuator is hard to see, it connects at the top of the gear fitting and is for the most part in the wing root area outboard of the landing gear itself. Hope this answers some questions.

 

[xcr600]

The CRJ MLG is driven to the down and locked position during an alternate extension with the aid of the downlock assist actuator. This is a seperate actuator that is connected at the top of the gear fitting and during normal operation just moves freely with the gear but during the Emerg. Ext has #2 hyd system pressure routed to it via the downlock assist actuator selector valve. This actuator is hard to see, it connects at the top of the gear fitting and is for the most part in the wing root area outboard of the landing gear itself. Hope this answers some questions.

Now that sounds correct to me -Thanks