Sponsor Message:
Civil Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
WhatIs"DisplacedThreshold"OnFinal?  
User currently offlineTappan From United States of America, joined Oct 1999, 1538 posts, RR: 43
Posted (13 years 6 months 1 week 5 days 5 hours ago) and read 772 times:

Boston tower tonight squeezed in a 737 landing on Runway4R seconds after a 747 took off on same runway. Tower said to the 737 ""Displaced Threshold" in effect clear to land....What is that???Anybody know???
Thanks

2 replies: All unread, jump to last
 
User currently offlineCYLW From Canada, joined Apr 2000, 427 posts, RR: 0
Reply 1, posted (13 years 6 months 1 week 5 days 2 hours ago) and read 742 times:

A displaced threshold is where for some reason they need to move the threshold further down the runway. Possibly there was damage to the first part of the runway, or there are temporary (or permanent) bstacles on the normal approach path that warranted moving the of threshold. My KBOS chart shows that 4R is displaced a little bit down the runway from taxiway Sierra.

Hope this helps

Matt


User currently offlinePurdue Arrow From United States of America, joined May 1999, 1574 posts, RR: 8
Reply 2, posted (13 years 6 months 1 week 5 days ago) and read 723 times:

Actually, a displaced threshold is a little different than that. While displaced threshold does mean that the threshold of the runway, or the beginning of the usable runway for landing, is moved from the edge of the concrete, it is not due to problems with the runway surface. A displaced threshold generally keeps airplanes a little higher that approaching for the very beginning of the runway, so a landing plane can clear obstacles in the normal approach path. At the Purdue Airport in Lsfayette, IN, for example, we have a displaced threshold that keeps aircraft higher than the height of a freight train when we cross the railroad tracks just before runway 23. The area before the displaced threshold can be used for takeoff, but is not usable for landing.

Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
HA A-330 "Y" Configuration posted Mon Mar 9 2009 21:50:36 by HNL-Jack
IAH Terminal "E" Checkin posted Thu Oct 9 2008 12:03:06 by Lincoln
Traveling "Stand-by"/"Space-A" On Cargo posted Sun Jul 20 2008 05:16:15 by FlyASAGuy2005
340 And "N" Carrier Do Not Match? posted Fri Feb 15 2008 06:37:40 by Hush-Kit
COA1878 "N" Request For 12/16/07 posted Sun Dec 16 2007 20:47:27 by SCXmechanic
Delta To "A" Concourse In PHL posted Thu Oct 4 2007 15:30:51 by Retaf98
Googling "N" Numbers...have You Noticed? posted Sun Jul 8 2007 18:56:20 by Rampkontroler
BA Looking For "N" Registered 757s For EU-US posted Tue Jul 3 2007 11:49:24 by Speedmarque
CO - Why No "G" Or "H" Seats? posted Mon Jun 4 2007 22:25:33 by 1337Delta764
Full "Y" Ppr Ticket Only Half Used, Can I Renew? posted Fri May 11 2007 19:44:35 by Hamad