Jump to content

Sign in to follow this  

747-400 IRS Lineup

Recommended Posts

I have recently acquired the 747-400 and am having the best flight sim experience ever in the many years I have used computer sims; what a great package - this tops them all.Well done to the PMDG guys for providing the Type Rating Course notes for the 400; they are certainly getting me up to speed with the operations, characteristics and capabilities of the 400.I have a couple of questions that I would appreciate feedback on:1. Which is the correct procedure for lining up the IRS during a cold and dark start? I am a little confused between using the one published in the PMDG 747-400 Aircraft Operating Manaul and FMC Handbbok (.pdf doc on the website), or what was provided in TRC #1? How do you know when the IRS have aligned?2. Where is the best place (website) to get the latest versions/updates of SIDSTARS and Routes/Waypoints/Fixes/Airfields? I know that there are a couple of sites but I'm not sure if I am downloading the same date from them!!!I'm looking forward to TRC #4 so I can get my VNAV procedures sorted out - still a bit confused on just how it all fits together... Cheers,GuySubOne@YPPH


Guy Burton




Share this post

Link to post

The way I go about aligning the IRS is once electrical power is established, moving the 3 selectors from OFF to the NAV position. This will start the alignment process. You will then need to set the IRS position on the POS page of the fmc. Just line select the GPS position (LSK 4R I think) to the required field (LSK 5R I think). Sometimes you are required to enter twice (thats another story), so if asked, do so. You know the IRS's are aligned once the IRS count down timers reach 0+ and the displays should come alive. As for nav data etc try these:www.navdata.atwww.planepath.com

Alaister Kay

Share this post

Link to post

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.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.

    $565.00 of $25,000.00 Donate Now
  • Create New...