Go Back   Airline Pilot Central Forums - Find your next job as a Pilot > >
Technical Technical aspects of flying

Welcome to Airline Pilot Forums - Connect and get the inside scoop on Airline Companies

If this is your first visit, be sure to check out the FAQ. Join our community today and start interacting with existing members. Registration is fast, simple and absolutely free.

User Tag List

Thread Tools Search this Thread Display Modes
Old 02-08-2019, 09:34 AM   #21  
Gets Weekends Off
Adlerdriver's Avatar
Joined APC: Jul 2007
Position: 777F FO
Posts: 3,100

Originally Posted by MysteriousMrX View Post
again, I think I’m overthinking it and confusing myself! But thanks for the responses.
The max weight may indeed be something to do with the runway but it was DFW and all runways are very long.

But on ACARS landing data, surely everyone gets the same info: which includes the unfactored length and the longer 60% factored length.
First, the fact that DFWs runways are "very long" doesn't automatically mean your MTOGW for takeoff on a particular runway, on a particular day is going to be the max certified weight for your aircraft. Factors such as winds, temperature, assumed/flex temps, 10/20 % derated thrust for some aircraft, obstacles, flap settings, etc. may not allow takeoff at max certified weight.

Second, each airline has specific methods they use to compute performance. Mine doesn't use ACARs. We use a program incorporated into our EFB and compute all the data ourselves, both for takeoff and landing. My previous aircraft at the same company used quick reference data in the QRH for landing distance.

Third, information received from whatever source(s) an airline uses may be presented very differently. Assuming we all can decipher the end product you receive and help you with your questions is a big assumption. Along those same lines, your assumption that "everyone" gets the same information when computing landing distance isn't valid. On my a/c, we input landing weight, ATIS information and runway condition, max or idle reverse, MELs/CDLs. The output is landing distance for each autobrake setting and XW/TW components. We don't get unfactored blah blah.... 60% factored whatever and start doing math. It's one number for a particular set of conditions and autobrake setting.

I think the recommendations that you contact your training/standards department are a good start. Having a solid working knowledge of the performance information provided to you by whatever method you use is pretty important when you start getting close to the edges of the envelope dealing with windshear precautions, cluttered takeoffs, runway shortening and obviously landing under less than optimal conditions.
Adlerdriver is offline   Reply With Quote
Old 02-14-2019, 04:04 PM   #22  
Gets Weekends Off
Joined APC: Jan 2017
Posts: 291

Originally Posted by 2StgTurbine View Post
Your questions have been answered. I will try to simply it. Once you take off, the 60% rule does not matter, that number is only used to plan the flight.
Not so fast, some operators require the factored distance for actual landings.
vessbot is offline   Reply With Quote
Old 02-15-2019, 12:24 AM   #23  
Gets Weekends Off
Twin Wasp's Avatar
Joined APC: Oct 2007
Position: Asst. button pusher
Posts: 2,392

Yes but the factored distance isn't the "stop within 60% of the LDA" used to release the aircraft.
Twin Wasp is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 On
Pingbacks are On
Refbacks are On

Related Topics
Thread Thread Starter Forum Replies Last Post
Open Time Release ... Pathetic GetRealDude FedEx 16 11-29-2016 04:44 PM
Ozone RA tool on flight plan release 155mm Cargo 9 01-25-2016 07:05 AM
Delta to buy stake in China Eastern Airlines snowdawg Delta 263 08-19-2015 02:17 PM
ACARS technical info thingsthatfly Technical 4 04-06-2010 05:10 PM
ACARS chime? GOCKY Major 17 10-28-2009 04:11 PM

All times are GMT -8. The time now is 12:36 AM.

vBulletin® v3.9.3.5, Copyright ©2000-2019, MH Sub I, LLC dba vBulletin
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Website Copyright 2000 - 2017 MH Sub I, LLC dba Internet Brands

Search Engine Optimization by vBSEO 3.6.1