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

ACN vs PCN

Thread Tools
 
Search this Thread
 
Old 14th May 2017, 05:36
  #1 (permalink)  
Thread Starter
 
Join Date: Jun 2014
Location: Mordor
Posts: 338
Likes: 0
Received 0 Likes on 0 Posts
ACN vs PCN

Hi guys,

One airline I know is about to start long range ops from a regional airport. They operate a 787-8 which has MTOW ACN of 71, for the pavement in question (and they're gonna need to be close to MTOW for this flight)

However, the runway in question has PCN of 52, which is waay lower then the ACN.

How is this ops possible? My Jeppesen legend/explanation chapter says the PCN can be occasionally exceeded by 5 percent. In the above case we are talking about 35 percent overload...
Sidestick_n_Rudder is offline  
Old 14th May 2017, 06:47
  #2 (permalink)  
 
Join Date: Jun 1999
Location: Oztrailia
Posts: 2,993
Received 14 Likes on 10 Posts
Operator dispensation obviously with restrictions on number of movements etc
ACMS is offline  
Old 14th May 2017, 17:44
  #3 (permalink)  
 
Join Date: Dec 2013
Location: Montréal
Posts: 133
Likes: 0
Received 0 Likes on 0 Posts
Or take off at a lower weight, go somewhere nearby, refuel and go.
The return can be made non stop since the landing weights are probably inside the PCN......
Gilles Hudicourt is offline  
Old 14th May 2017, 22:22
  #4 (permalink)  
 
Join Date: Sep 2014
Location: Canada
Posts: 1,257
Likes: 0
Received 0 Likes on 0 Posts
PCN is mostly about long-term "wear and tear" (economics).

An airline willing to pay $$$ to cover the additional wear and tear / extra maintenance can easily get a waiver from many airports.

The airport wants the airline's business, after all.

Last edited by peekay4; 14th May 2017 at 22:37.
peekay4 is offline  
Old 15th May 2017, 05:11
  #5 (permalink)  
Thread Starter
 
Join Date: Jun 2014
Location: Mordor
Posts: 338
Likes: 0
Received 0 Likes on 0 Posts
O.K. So looks like the PCN is not really cast in stone. Thanks for replies!
Sidestick_n_Rudder is offline  
Old 15th May 2017, 22:57
  #6 (permalink)  
Moderator
 
Join Date: Apr 2001
Location: various places .....
Posts: 7,187
Received 97 Likes on 65 Posts
If you run a search on PCN and ACN and the poster Overrun you should come up with a few threads on this subject. Overrun is an engineering expert on pavements.

For example, http://www.pprune.org/tech-log/42840...?highlight=pcn
john_tullamarine 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



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.