Jump to content
Sign in to follow this  
Jeff_B

Elec Hyd pumps - when to turn on

Recommended Posts

Hi all,  have watched several cockpit dvd's on the NG and i following various flows/tutorials for the NGX - question is in the  flows/tutorials before engine start calls for Elec Hyd pumps to be turned on.  After watching real life cockpit action they have been turned on after engine start - does it matter (obviously it doesnt if they do it) but what is normal practice or would it be different SOP's for diff airlines?

 

Share this post


Link to post
Share on other sites

Yeah some airlines leave them off until after engine start , some leave the A side off until the pushback tug disconnects. Would be cool if a some RW's could chime in , it's a fascinating subject.

 

Eric W

Share this post


Link to post
Share on other sites

Cheers, thought it was interesting when i noticed it on some vids. Hopefully here from some RW's as you say.

Share this post


Link to post
Share on other sites

At American we turn them on just before pushback.


Tom Landry

 

PMDG_NGX_Tech_Team.jpg

Share this post


Link to post
Share on other sites

As with Tom, during the Before Engine Start scan, this is assuming either a pushback is not required or that the steering bypass pin is in-place in the nose wheel to isolate the nosewheel steering from System B. I have never done a pushback without the pin, but if I did only ELEC 1 (system B) could be switched on.

Share this post


Link to post
Share on other sites

Isn't NWS part of Hydraulic System A?

Share this post


Link to post
Share on other sites

 

 


Isn't NWS part of Hydraulic System A?
.

Yes it is, thanks Thomas. My post looks a bit screwy, I obviously just typed some random crap and pressed Post! :D

Share this post


Link to post
Share on other sites

We do it before we request push back and start clearance.

 

We coordinate with ground engineer to make sure that all control surfaces are clear of people before we turn on the pumps and pressurise the hydraulic system. 

We don't turn off the A system as we use the bypass pin which de-pressurises the nose wheel do it can be turned by the tug. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
×
×
  • Create New...