When do you slow to Final Approach Speed?
Thread Starter
Joined: Feb 2002
Posts: 8
Likes: 0
From: YPPH
When do you slow to Final Approach Speed?
Hello all,
I'm an TMA controller based at YPPH and was wondering...
If the FMS has calculated Flap/Speed eg. 25deg=146kt; 30deg=140kt etc - via the Approach Reference page then when do Aircrew reduce to such speeds.
Is it time based or level based??
For example - Most operators in Australia, have reduced to 250kts by A050, if not by A100 (dependent upon FLOW instructions/STAR limitations etc...) but when do you commence speed reductions to "Final Approach Speed".
Do you use the MCP and just "wind down" via the IAS/Mach selector/window??
Please excuse my ignorance but such knowledge and understanding helps to educate both myself and collegues in "Approach Control".
.
BE:.
I'm an TMA controller based at YPPH and was wondering...
If the FMS has calculated Flap/Speed eg. 25deg=146kt; 30deg=140kt etc - via the Approach Reference page then when do Aircrew reduce to such speeds.
Is it time based or level based??
For example - Most operators in Australia, have reduced to 250kts by A050, if not by A100 (dependent upon FLOW instructions/STAR limitations etc...) but when do you commence speed reductions to "Final Approach Speed".
Do you use the MCP and just "wind down" via the IAS/Mach selector/window??
Please excuse my ignorance but such knowledge and understanding helps to educate both myself and collegues in "Approach Control".
.
BE:.
Joined: Nov 2005
Posts: 342
Likes: 1
From: right here
engines at idle till final flap setting.
250kts below FL100
turning to final track, about 4-8 NM till GS intercept (depending on wind and gross weight) let it "shoot out" from 250 to 200 in level flight. about 3 NM before glide flaps 1, speed bug rougly 185, flaps 5, bug 170. glide slope capture. still idle.
6NM till rwy, gear down -> lots of drag, flaps15, speed ~ 160, final flaps 30/40 Vref from 125-145 + 5-20kts wind correction. now we are about 4NM out in 1200ft, landing checklist. all should be finished by 1000ft.
250kts below FL100
turning to final track, about 4-8 NM till GS intercept (depending on wind and gross weight) let it "shoot out" from 250 to 200 in level flight. about 3 NM before glide flaps 1, speed bug rougly 185, flaps 5, bug 170. glide slope capture. still idle.
6NM till rwy, gear down -> lots of drag, flaps15, speed ~ 160, final flaps 30/40 Vref from 125-145 + 5-20kts wind correction. now we are about 4NM out in 1200ft, landing checklist. all should be finished by 1000ft.
PPRuNe supporter
Joined: Dec 2003
Posts: 1,676
Likes: 0
From: Planet Earth
Agree with Boac, during IMC I am obligated to be in a stabilized condition by 1000 HAT per SOP, on the small Airbus I am in config 2 at GS intercept, gear down at 1700 HAT, at 1400 I will fully configure and reduce to approach speed of approximately 140 KTS.
