Jump to content

Sign in to follow this  
Guest Andrea

ILS path missing during ILS approach

Recommended Posts

Guest Andrea

Dear all,with my PMDG 737, more than one time, I missed ILS path during an ILS approach to Milan Linate LIML 36R runway.During ILS approach, after having intercepted ILS Localizer and Glideslope with dual A/P engaged (CMD ON), when I reduce speed from 160 Knots to final landing speed (about 132 Knots) and pull out final flap configuration (30 degrees) the 737 misses the glideslope path.Andreahttp://www.precisionmanuals.com/images/forum/800driver.jpghttp://fs2crew.com/linepilot.jpg

Share this post


Link to post
Guest EDCS

Hi Andrea,do you above or below the GS? Stefan

Share this post


Link to post
Guest EDCS

Andrea, gave us a little more information about your flap and speed settings. With flaps 30 you have a lot of upforce. Take a moment time and look at your wings and flaps. So normally you passing the OM with 170 Knots an gear down and flaps 15 or flaps 10 with gear up. After the OM I reduce to Vref and setting the flaps step by step from 25 to 30. If you set the final flap configuration to early at a higher speed, the nose comes up and your bobby is climbing. Stefan

Share this post


Link to post
Guest Andrea

More info:1) I intercept and catch ILS localizer whilst I am arriving to target descent altitude of 3000 feet below the ILS glideslope path. Speed around 190-200 knots, flaps 5.2) Then I set dual A/P for autoland. Then I set gear down and reduce speed to 160 knots and set flaps to 15.3) Then I intercept and catch the ILS glideslope path and the aircraft starts to descend towards runway heading. 4) At about 2000 feet altitude I reduce speed to final landing speed (130-132 Knots) and set flaps to 30. The problem occurs after having set flaps to 30. Probably I do this operation too fast and the aircraft lifts up the nose missing the ILS glideslope path.Andreahttp://www.precisionmanuals.com/images/forum/800driver.jpghttp://fs2crew.com/linepilot.jpg

Share this post


Link to post

AndreaAnd what does the FMA tell you during this final approach?Cheers,


Mats Johansson
PMDG Flight Test Dept
Boeing777_Banner_BetaTeam.jpg

| Asus Z270-A | Intel i5-7600K @ 4.8 GHz OC/H2O | nVidia Geforce GTX 1070 8GB OC/O2|

Share this post


Link to post
Guest EDCS

Looks o.K. Have you tried it with only one AP engaged or when hndflying the approach?GreetingsStefan

Share this post


Link to post
Guest dt1951

Hmmm Sounds like you have reduced your speed too early. Try flying Vref+5 until over the threshold and then cut throttles.

Share this post


Link to post
Guest EDCS

Autoland is flowen with AT on. So there is no need to set Vref + 5. AT will do the correction for you. GreetingsStefan

Share this post


Link to post
Guest EDCS

Sorry, + 5 for Autoland is right.......Stefan

Share this post


Link to post
Guest EDCS

Yepp, I use an "First Officer reference card"(ORC) form continantel airlines. Thats the procedure for that airline. Also written in Bil Bulfers Guide.Search a little bit here: http://www.fmcguide.com/support.htmlYou will find the QRC and some other nice stuff normaly included in the guide.Always happy landings......maybe by hand ;-)Stefan

Share this post


Link to post
Guest EDCS

....look at the profiles link.Stefan

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.


    5%
    $1,450.00 of $25,000.00 Donate Now
×
×
  • Create New...