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

B777 Max Glide slope Angle

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

B777 Max Glide slope Angle

Old 5th Jun 2021, 02:40
  #1 (permalink)  
Thread Starter
Join Date: Dec 2019
Location: Delhi
Posts: 1
B777 Max Glide slope Angle

Hello All,

Request guidance regarding ILS approaches with G/S angle more than 3.25 deg on B777-300ER e.g London City, Marseille etc.In B777 FCOM the limits of G/S angle are 2.5 deg (min) to 3.25 deg (max) for autoland.

1. Are these G/S limits for non auto land also?
2. Is there a limit of max G/S angle for ILS manual landings?
3. Request any document that can be referred for better understanding.

Thanks in Advance
777Avi is offline  
Old 5th Jun 2021, 18:52
  #2 (permalink)  
Join Date: Jan 2008
Location: Reading, UK
Posts: 12,987
Please let us know when you're planning to land a 777 at London City ...
DaveReidUK is online now  
Old 6th Jun 2021, 06:04
  #3 (permalink)  
Join Date: Feb 2002
Location: US
Posts: 94
Those limitations are typical on many types.

I would recommend that you download a copy of ICAO DOC 8168. Typically the limit for an ILS glidepath is 3.5, above this it is considered a steep glide path angle and it is recommended (from a procedure design point of view) to use this steeper glide path only for obstacle clearance. There are a lot of considerations when flying a steeper angle. I.e. extra margin in case of go around, engine spool-up time etc. Airbus has published some 'getting to grips with...' documents. Getting to grips with CAT2 CAT3 has a lot of useful information about aircraft certification, but it is a bit dated. Hope this helps.
KingAir1978 is offline  
Old 6th Jun 2021, 06:48
  #4 (permalink)  
Join Date: Jul 2006
Location: Somewhere over the rainbow
Posts: 191
Originally Posted by 777Avi View Post

1. Are these G/S limits for non auto land also?
Definitely not. That would be very limited. Not 777 qualified but I know 777 are landing daily in Mauritius Island (FIMP) runway 14 GS angle is 3.5 degrees.
pineteam is offline  
Old 6th Jun 2021, 07:38
  #5 (permalink)  
Join Date: Dec 2001
Location: Europe
Posts: 402
4.5 degrees and steeper is considered a steep approach for aircraft certification and crew qualification purposes in my experience with various biz jets.
733driver 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 - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.