i don't say 737 and other boeing's airplanes are bad or blah . . . ,i just say that boeing is on step behind airbus in autoflight equipments and computers,and for lasnubes,you don't learn thing 'till you study,you'll learn it when you experience it,fail on it,and then try it!not with a pdf tutorial with a note:"DO NOT USE FOR FLIGHT"!

Capt Farhadi, for a start, don't get so defensive, it makes you sound like a 14yr old, not someone with 3500 hours on type.. Now I still don't understand what you mean so maybe this is a language thing.

 

What do you mean by 'ALT CNSTR and manages VS and SPD manage holds MCDU's desired speed'?? Yes of course the bus obey's alt constraint's when flying managed while maintaining the target speed in the FMGS. what does V/S have to do with it?

 

guy's I don't fly the NGX but I browsed the FCOM, does it not behave the same as the 777/744 when in LNAV/VNAV?

 

Regards

I am reminded of another quote, "Never wrestle with a pig. The pig enjoys it and you get dirty." I wish you the very best sir.

Carl I agree with you 100% but I still want to know what the hell he's on about regarding the A3xx I am sure it's just a case of he's not explaining it properly.

 

EDIT - The closest thing I can come up with is the Bus will revert to 1000fpm descent at managed target speed if you are not on the profile while managed (VNAV) if that's not what he's on about then I give up.

 

I'm pretty sure the 744 did the same, and it has nothing to do with FLCH or OP DES..

 

Yeah Carl, you are definitely right...

till you've not reached T/D,it gets 1000 fpm,but when you get there,it will follow it selfs descend plan,and i have to remind OP DES is not same as LVL CH like i saw in boeing,when you select OP DES,it will just delete the next altitude constraint and descend like his plan in MCDU,till open descend is in progress,for example if you pass FL 100,speed manage changes speed select to 250 or below but with my information from LVL CH,till it is descending with LVL CH the speed is out of FMGS control and for example if you pass FL100,speed select will not change!

ps. i have to say every pilot is very zeal on his type!

Ok I get you now, but what your describing is not what I have seen on other boeings.

 

I dont see why it should be any different on the NG.

 

Regards

i didn't understood you,any how,if i'm on lvl ch and passing 10000 ft,does it change speed select?

Well my point is from memory it should be automatic like the bus. It's been a while since I've flown Boeing, it's either been the MD11 or Airbus.

 

Knowing Boeings hands on philosophy you probably have to do it yourself.

 

At least one thing I've learnt from this thread is I need to get my head back into the Boeing FCOMS for a refresher

 

Regards

Stay in VNAV, set you desired altitude, and press "Alt Intv" on the MCP to descent in VNAV PATH mode before top of descent. (Alternatively you can press "DES NOW" in the FMC in the descent page). This will give you a 1000fpm descent until you're on descent path.

With this mode speed will stay in FMC SPD und VNAV will take care of any altitude constraints.

 

Hope that helps

dear chri,i see but if i want to keep altitude constraint,what i'm suposed to do?

With the procedure i described and as long as you stay in VNAV PATH the plane won't descent below the altitude constraint until it has passed the waypoint. So there nothing more to do.

consider my Cruise FL is 350,atc told my to descend to fl 220,then after 1 minute that i was maintaining FL220,atc told me to descend to 120,if i don't want to use LVLCH,what i am suposed to do?

consider my Cruise FL is 350,atc told my to descend to fl 220,then after 1 minute that i was maintaining FL220,atc told me to descend to 120,if i don't want to use LVLCH,what i am suposed to do?

 

Continue with VNAV or use V/S.

thank you VIPERGTSR01!i'll try it

what about honeywell mcp?whit "thing"does work like ALT INTV?(except Des now on MCDU)

 

sorry,"which"