Climbing on ILS

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Climbing on ILS

Postby expat » Wed May 04, 2005 3:25 pm

When flying the "737 Experience" aircraft on an ILS approach the aircraft always climbs.
I start at about 20 miles out, engage ILS and the aircraft goes about 30 to 40 degrees nose up and climbs to about 15000 feet. I have tried various starting altitudes and I get the same responce. The aircraft still follows the correct track, it just over flies the airport..
Heading and coarse are both set to the runway heading. Alt hold is off.  I have also tried to engage auto land, but it has no effect.

anyone got any ideas??
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1. Captain, if the problem is not entered into the technical logbook.........then the aircraft does not have a problem.
2. And, if you have time to write the fault on a napkin and attach to it to the yoke.........you have time to write it in the tech log....see point 1.
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Re: Climbing on ILS

Postby beefhole » Wed May 04, 2005 3:33 pm

20-30 miles out is a REEALLLY long way out, meaning that the glideslope is FAR FAR above you.  This would explain why it climbs.  You need to start your final approach much, much later.  (sorry I don't have a mileage, ATC has been vectoring me in for so long...)
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Re: Climbing on ILS

Postby jrpilot » Wed May 04, 2005 3:37 pm

There is no set distance for the final, but generally I believe it is 7 miles, and you may still be under the GS at this time so for a little bit of time you may stay level and then gone down with the GS
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Re: Climbing on ILS

Postby expat » Wed May 04, 2005 3:38 pm

That could be it, I was on try out flight VFR after installation. I will try IFR out and see what happens.
Thanks
Matt
"A bit of a pickle" - British translation: A catastrophically bad situation with potentially fatal consequences.

PETA Image People Eating Tasty Animals.

B1 (Cat C) licenced engineer, Boeing 737NG 600/700/800/900 Airbus A318/19/20/21 and Dash8 Q-400
1. Captain, if the problem is not entered into the technical logbook.........then the aircraft does not have a problem.
2. And, if you have time to write the fault on a napkin and attach to it to the yoke.........you have time to write it in the tech log....see point 1.
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Re: Climbing on ILS

Postby dave3cu » Wed May 04, 2005 7:59 pm

Do not disengage the Alt. hold, the ILS will disengage it as it intercepts the glide slope .

No expert here, but this works for me.
Last edited by dave3cu on Wed May 04, 2005 8:27 pm, edited 1 time in total.
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Re: Climbing on ILS

Postby chomp_rock » Wed May 04, 2005 8:58 pm

Remember, start slightly below the GS, not above it.
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Re: Climbing on ILS

Postby expat » Fri May 06, 2005 12:59 am

Sorry for the late get back. Thanks for all the input. I will try to find time between wife, children, dog, fish, cutting the grass, cleaning the cars, fixing all the stuff that was damaged/broken during the week by said wife, children, dog. (I don''t find that the fish break much) and shopping to give your thoughts a go.
Thanks again
Matt
"A bit of a pickle" - British translation: A catastrophically bad situation with potentially fatal consequences.

PETA Image People Eating Tasty Animals.

B1 (Cat C) licenced engineer, Boeing 737NG 600/700/800/900 Airbus A318/19/20/21 and Dash8 Q-400
1. Captain, if the problem is not entered into the technical logbook.........then the aircraft does not have a problem.
2. And, if you have time to write the fault on a napkin and attach to it to the yoke.........you have time to write it in the tech log....see point 1.
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Re: Climbing on ILS

Postby Nav » Fri May 06, 2005 10:17 am

Matt, you should leave both Alt. Hold and Hdg. Hold on until the autopilot turns them off. You may also be neglecting to switch the mode from 'GPS' to 'NAV'. Distance out isn't critical.

This will take you through the whole procedure:-

http://www.simviation.com/cgi-bin/yabb/ ... 1111322151
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Re: Climbing on ILS

Postby expat » Fri May 06, 2005 3:10 pm

Thanks Guys.
My problem was that I started tooooooooo far out.

Matt
"A bit of a pickle" - British translation: A catastrophically bad situation with potentially fatal consequences.

PETA Image People Eating Tasty Animals.

B1 (Cat C) licenced engineer, Boeing 737NG 600/700/800/900 Airbus A318/19/20/21 and Dash8 Q-400
1. Captain, if the problem is not entered into the technical logbook.........then the aircraft does not have a problem.
2. And, if you have time to write the fault on a napkin and attach to it to the yoke.........you have time to write it in the tech log....see point 1.
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Re: Climbing on ILS

Postby beefhole » Fri May 06, 2005 9:59 pm

Thanks Guys.
My problem was that I started tooooooooo far out.

Matt

As suspected :)  Happy ILS' ;)
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