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

Airbus A330 MCDU

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

Airbus A330 MCDU

Old 15th Aug 2011, 10:56
  #1 (permalink)  
Thread Starter
Join Date: Apr 2011
Location: Tehran
Age: 42
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
Airbus A330 MCDU


i want some information about:
TO SHIFT [M] [ ] *
at the Airbus MCDU TAKE OFF PAGE

if some body explain to me about that, ill really appreciate
Farid is offline  
Old 15th Aug 2011, 12:10
  #2 (permalink)  
Join Date: Apr 2006
Location: Asia
Age: 49
Posts: 524
Likes: 0
Received 0 Likes on 0 Posts
Hi Farid, the takeoff shift is derived from the takeoff performance calculation when using a shifted departure point. ie. Intersection takeoff.
Its purpose is to provide a final FM position update at takeoff thrust when GPS PRIMARY is not available. It also gives you more accurate climb predictions based on you new departure point, which are only for advisory.
It is commonly used at long runways were it can be advantagous in saving time and fuel, and even sugested by atc for traffic sequencing.
MD83FO is offline  
Old 17th Aug 2011, 18:49
  #3 (permalink)  
Join Date: Oct 2007
Location: Miami
Posts: 148
Likes: 0
Received 0 Likes on 0 Posts
It updates take-off position regardless of GPS Status.
guiones is offline  
Old 17th Aug 2011, 22:28
  #4 (permalink)  
The Bumblebee
Join Date: Jul 1999
Location: Inside the shiny tube.
Posts: 333
Likes: 0
Received 0 Likes on 0 Posts

You are right, it updates regardless of GPS primary, but with GPS primary it is not necessary to insert the TO Shift as the system will take the GPIRS coordinates at the application of FLEX/TOGA. Whereas, if you are flying without GPS primary you are giving FMGS your exact location of take off (by inserting take off shift) at the time when you move thrust levers to FLEX/TOGA.

Our company policy is if GPS primary no need to insert TO Shift, otherwise you do.
DesiPilot 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.