Wikiposts
Search
The Pacific: General Aviation & Questions The place for students, instructors and charter guys in Oz, NZ and the rest of Oceania.

Conditional DA

Thread Tools
 
Search this Thread
 
Old 11th Jun 2010, 01:13
  #1 (permalink)  
Thread Starter
 
Join Date: Apr 2004
Location: Aus
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Conditional DA

Hi Everyone

Would anyone know what is a CONDITIONAL DA on an ILS eg. Launceston ILS LOC 32L?

Thank you for any replies.
MONK is offline  
Old 11th Jun 2010, 01:51
  #2 (permalink)  
 
Join Date: Sep 2009
Location: adelaide
Posts: 5
Likes: 0
Received 0 Likes on 0 Posts
conditional da

suspect it may have a lot to do with tower hours and no active atis. (QNH)
gurney42 is offline  
Old 11th Jun 2010, 02:01
  #3 (permalink)  
 
Join Date: Feb 2008
Location: Stralya
Posts: 198
Likes: 0
Received 0 Likes on 0 Posts
A CONDITIONAL DA (or MDA) means that there is a CONDITION associated with using the Conditional Minimum. You HAVE TO then hunt for the condition, printed usually somewhere on the chart itself. I don't have the Launy Charts on hand (so you obviously have to verify this), but from memory it is associated with a higher minima in the absence of an ACTUAL QNH, such as when the tower man is home sleeping. Good luck on your exam.
Red Jet is offline  
Old 11th Jun 2010, 02:31
  #4 (permalink)  
 
Join Date: Oct 2007
Location: Aus
Posts: 2,803
Received 428 Likes on 235 Posts
The 32L ILS at Launy has a shaded S-I minima box so it may be reduced by 100ft when an accurate QNH is available (ATIS, AWIS outside tower hours). It also has an additional note that the visibility may be reduced to 0.8km (cat I minima other requirements met also) from 1.2km if an actual QNH is obtained.

QNH from TAF DA is 850(302) and 1.2km vis
QNH from approved source DA is 750(202) and 0.8km vis

This all assumes you and your aircraft can use these minima.

For instance are the HIALS activated with the AFRU+PAL after hours?

I am interested whether this is a Jeppesen term or CASA. AIP/DAP don't mention conditional DA/MDA and I don't have a set of Jepps at hand.

Last edited by 43Inches; 11th Jun 2010 at 02:43.
43Inches is offline  
Old 11th Jun 2010, 04:09
  #5 (permalink)  
 
Join Date: Jun 2006
Location: Wherever the hotel drink ticket is valid
Posts: 281
Likes: 0
Received 0 Likes on 0 Posts
You also see "Conditional" minima used where terrain clearance in the missed approach requires a higher than normal climb performance. In such a case, a DA/MDA for standard climb gradient is published, but may be reduced conditional upon being able to maintain a higher climb rate in the missed approach.
Icarus53 is offline  
Old 11th Jun 2010, 05:33
  #6 (permalink)  
 
Join Date: Jan 2007
Location: Qld troppo
Posts: 3,498
Likes: 0
Received 2 Likes on 2 Posts
An advantage of SE IFR is that a SE aircraft can generally meet the minimum rate of climb requirements for a missed approach, and in the event of an engine failure, minimum climb requirements a thing you don't have to worry yourself about.

Dr

Last edited by ForkTailedDrKiller; 11th Jun 2010 at 07:21.
ForkTailedDrKiller is offline  
Old 11th Jun 2010, 06:31
  #7 (permalink)  
 
Join Date: Jan 2004
Location: Here and there
Posts: 3,104
Received 14 Likes on 11 Posts
Hmm, and if you just lose a cylinder or two, what then Dr?
AerocatS2A is online now  
Old 11th Jun 2010, 07:53
  #8 (permalink)  
 
Join Date: Nov 2008
Location: The Shire
Posts: 2,890
Likes: 0
Received 1 Like on 1 Post
Hmm, and if you just lose a cylinder or two, what then Dr?
I suspect the missed approach minimum climb gradient won't be something you will be concerning yourself with in this situation
The Green Goblin is offline  
Old 11th Jun 2010, 08:00
  #9 (permalink)  
 
Join Date: Dec 2008
Location: melb
Posts: 2,162
Likes: 0
Received 1 Like on 1 Post
A SE App in the Poo is shear madness Dr You have a missed App Clb gradient as well for yr A/C type(SE) just like everyone else only trouble is its' DOWNWARD!!!
AS for cond Miss App? Well the answers from well informed guys/gals are already at hand here

Wmk2
Wally Mk2 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.