Simviation Forum - Shuting off the ILS

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Shuting off the ILS (Read 537 times)

Jan 14^th, 2013 at 3:05pm

alrot Offline
Colonel
Freeware Designers Above
All..

Posts: 10231

what is the "Legal" distance to shuting off the ils and take the control of the airplane on final aproach , for Tubes (a320,b737/747/777 etc) when is the right moment to pass to manual control ?

Venezuela

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Reply #1 - Jan 14^th, 2013 at 3:25pm

EVVFCX Offline
Colonel
Been there done it-well
most of it.
Pontefract, West Yorkshire

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Posts: 499

Hi alrot,

I suspect the time to go off ils would be at the minimum decision height for whatever runway your approaching.

Can't think of a reason other than an aborted approach and not seeing the runway to come off ils.

regards

Syevee

May the Mynd be with you.
So far my number of landings either passenger or pilot equal my number of takeoffs, but that is due to change

13/07/11 Passed BMFA Fixed Wing 'A' test.
FSX Gold

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Reply #2 - Jan 14^th, 2013 at 5:53pm

pegger Offline
Colonel

Posts: 21

All categories of instrument approaches have published minimums for decent altitude and visualization of the runway with respect to the speed class of the aircraft you are flying, except some autoland catagories. If you don't have the runway in sight at the minimums, then it is go-around time, and perhaps deviation of the flight to the alternate airport.

For example, a CAT3 approach at KSEA has the following:
CAT3a RVR070 (700 feet)
CAT3b RVR030 (300 feet)
CAT3c N/A (not applicable)

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Reply #3 - Jan 14^th, 2013 at 11:17pm

reachva Offline
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Fly Reach Airways Virtual!
Melbourne, Australia

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Posts: 203

It also varies with the specific airlines operating procedures. Usually the decision height is the time to switch over to manual flight (as I do in sim) however some airlines I've heard advocate making the switch to manual earlier.

For a rule of thumb, I tend to prefer flying the last 1500ft down to the runway than letting the computers handle it, I get nervous watching the ground growing closer without my hands on the controls!

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Reply #4 - Jan 15^th, 2013 at 12:02am

WPadgett Offline
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Posts: 27

Just a guess but I believe he means "when to turn off the auto pilot" not "the ILS." The only way to "turn off the ILS" would be to change the nav frequency, a very bad idea in IMC.

CP - ASMEL, instruments

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