Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
BGN Descent  
User currently offlineModesto2 From United States of America, joined Jul 2000, 2801 posts, RR: 5
Posted (13 years 9 months 5 days 16 hours ago) and read 799 times:

There is a point at each flight (specified on the flight plan) marked "BGN Descent". At this point, the aircraft should commence its descent. However, how often does the air traffic controller clear the aircraft to a lower altitude in accordance with the flight plan? In other words, do air traffic controllers descend aircraft as specified on the flight plan or do they usually do it a few miles/minutes earlier or later? And I'd like to hear any unique stories from the airline pilots about being cleared too early or too late! As always...thanks for the help!

2 replies: All unread, jump to last
 
User currently offlineJetpilot500 From United States of America, joined Nov 2000, 78 posts, RR: 0
Reply 1, posted (13 years 9 months 5 days 12 hours ago) and read 771 times:

This is only on the flight plan for fuel planning purposes. ATC does not see this on the thier flight strip, so they do not know when you arrive at this point. Controllers have a pretty good idea of when to start an aircrafts decent, but sometimes you need to remind them. Many corporate jets fly higher than the airlines, requiring them to start the decent earlier because they are higher, so we often need to remind them when we need to start down.

Jetpilot500


User currently offlineJoe_R From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 9 months 4 days 16 hours ago) and read 757 times:


"I'd like to hear any unique stories from the airline pilots about being cleared too early or too late!"

ATC's job is to keep airplanes from hitting each
other... they'll decend a flight based on that
premise and when "possible" on the needs of
the flight.

Early isn't usually too much trouble unless you
are tight on fuel, because your fuel flow is higher
at lower altitudes. Sometimes an early descent
is requested to get a smoother ride.

Late is usually a problem, it's all about energy
and comfort. Obviously you gotta get down to
airport elevation in order to land, so you can
either use an aggressive (uncomfortable)
descent or simply lengthen the distance to
get down.

By aggressive I mean - engines at idle, spoilers
out, nose way down, passengers feeling their
seatbelts - kinda thing.

To lengthen your distance, you just need to
fly though more air, turn out, S turns, anything
but direct to the airport. This wastes time, and
if it makes you late - you become unpopular!

Different areas and some specific airports have
consistant problems that frequently cause a
late descent. More often than not, it cannot
be helped.

If you take the Northeast for example, you have
the case in point...

Many, many airports close together, very
complicated airspace, and tons of traffic of
all levels of performance.

Too often, the "late descent" and crossing
restriction are such that it exceeds the abilitites
of the aircraft or tolerance of the passengers,
so we get backed into a corner of sorts.

Careful coordination with ATC is the only way
out, typically - the crew relays "what" they "can"
do - and ATC responds with what they "must"
have... eventually a solution that works for
both is arrived at, and everything works out.

So... if we do our jobs right, the passengers
are comfortable and still arrive on schedule.

Joe


Top Of Page
Forum Index

Reply To This Topic BGN Descent
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Beech A 36 On Descent posted Sat Jun 7 2008 04:42:04 by Lenbrazil
Emergency Descent ... Questions ... posted Tue Dec 18 2007 18:13:45 by Brenintw
Descent Starting And Ears Pain posted Sun Dec 16 2007 08:26:36 by F.pier
744 (and Others) FPM Descent Range At Touchdown posted Sat Feb 10 2007 22:34:30 by SuseJ772
BAe146 Descent posted Sun Sep 24 2006 00:56:05 by BAe146QT
CDA - Continuous Descent Approach Question. posted Tue May 2 2006 20:59:17 by Julianuk
One Pack Inop Dring Cruise, Shall Descent? posted Sun Feb 19 2006 16:26:58 by Cptpilot737
Am I Clear For Descent? posted Fri Feb 3 2006 18:12:05 by Hamad130
Jet Engine Windmill On Descent posted Tue Aug 9 2005 21:05:53 by Taguilo
Descent Methods posted Wed May 18 2005 04:51:41 by Asteriskceo

Sponsor Message:
Printer friendly format