Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

B777 Data Link

Tech Log The very best in practical technical discussion on the web

B777 Data Link

Old 18th Oct 2012, 20:21
  #1 (permalink)  
Thread Starter
 
Join Date: Nov 2009
Location: PK
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
B777 Data Link

Hi

FCOM - Communications:

" If all boxes (VHF, SATCOM, HF) are deselected, ACARS loses the capability to send downlink messages, but can receive and display uplink messages."

how? unless it means that we have no controls to block the channel required for uplink messages.

thanks

Last edited by Haroon; 18th Oct 2012 at 20:32.
Haroon is offline  
Old 19th Oct 2012, 06:52
  #2 (permalink)  
 
Join Date: Dec 1998
Location: .
Posts: 2,992
Likes: 0
Received 0 Likes on 0 Posts
Cool

by deselecting or switching off you have turned off your capability to send, not the systems ability to receive.
spannersatcx is offline  
Old 19th Oct 2012, 09:51
  #3 (permalink)  
Thread Starter
 
Join Date: Nov 2009
Location: PK
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
thanks
Haroon is offline  
Old 20th Oct 2012, 11:33
  #4 (permalink)  
 
Join Date: Jun 2009
Location: Australia
Posts: 2,167
Likes: 0
Received 1 Like on 1 Post
Mmmmmm

Don't know about that?

The times I've de-selected them all the EICAS Message "Datalink lost" comes up.


Try it.

Last edited by nitpicker330; 20th Oct 2012 at 11:34.
nitpicker330 is offline  
Old 20th Oct 2012, 11:41
  #5 (permalink)  
Thread Starter
 
Join Date: Nov 2009
Location: PK
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
in ref to downlink perhaps
Haroon is offline  
Old 21st Oct 2012, 11:52
  #6 (permalink)  
 
Join Date: Jun 2009
Location: Australia
Posts: 2,167
Likes: 0
Received 1 Like on 1 Post
1/ request some weather

Then 2/ immediately deselect all COMMS off to get the Datalink Lost MSG.

I'll bet you that the weather never comes back until you select one valid and available path.
nitpicker330 is offline  
Old 21st Oct 2012, 11:59
  #7 (permalink)  
Thread Starter
 
Join Date: Nov 2009
Location: PK
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
thats interesting

if its true then it will negate the FCOM. anyway worth trying.
Haroon is offline  
Old 21st Oct 2012, 12:02
  #8 (permalink)  
 
Join Date: Jun 2009
Location: Australia
Posts: 2,167
Likes: 0
Received 1 Like on 1 Post
I downloaded the smart cockpit guide for 777 Data link system

http://www.smartcockpit.com/download...unications.pdf

Check page 81 and 86.


I would think that after you deselect all means of COMM the system would display
1/ Datalink lost
2/ No ACARS Connection.

meaning you get nothing to or from the Aircraft.

Last edited by nitpicker330; 21st Oct 2012 at 12:05.
nitpicker330 is offline  
Old 21st Oct 2012, 12:11
  #9 (permalink)  
Thread Starter
 
Join Date: Nov 2009
Location: PK
Posts: 195
Likes: 0
Received 0 Likes on 0 Posts
thanks

the link you've provided is the FCOM

see page 74 of it, where it says:

" If all boxes are deselected, ACARS loses the capability to send downlink messages, but can receive and display uplink messages."

regards
Haroon is offline  
Old 21st Oct 2012, 12:44
  #10 (permalink)  
 
Join Date: Jun 2009
Location: Australia
Posts: 2,167
Likes: 0
Received 1 Like on 1 Post
Ok.
The answer is to check the Manager messages.
nitpicker330 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.