Go Back  PPRuNe Forums > Flight Deck Forums > Tech Log
Reload this Page >

Airbus FMGS DIFRISP to DIFSRIP

Wikiposts
Search
Tech Log The very best in practical technical discussion on the web

Airbus FMGS DIFRISP to DIFSRIP

Thread Tools
 
Search this Thread
 
Old 1st Feb 2018, 16:36
  #1 (permalink)  
Thread Starter
 
Join Date: Mar 2017
Location: London
Posts: 169
Likes: 0
Received 0 Likes on 0 Posts
Airbus FMGS DIFRISP to DIFSRIP

Does anyone know the reason why airbus changed the order recommended to load the FMGC around a little while back?
Why does the secondary now need to be filled before the rad nav page whereas before the recommendation was to fill out the rad nav page before the secondary?
Does an engine out SID have any influence over the rad nav page?
applecrumble is offline  
Old 2nd Feb 2018, 01:28
  #2 (permalink)  
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,404
Likes: 0
Received 0 Likes on 0 Posts
The change is only in mnemonics. In DIFRIP the F always meant primary and secondary flight plan where it was possible to forget the secondary. in DIFSRIP it is easy to remember that there are two flight plans
vilas is offline  
Old 2nd Feb 2018, 09:20
  #3 (permalink)  
Thread Starter
 
Join Date: Mar 2017
Location: London
Posts: 169
Likes: 0
Received 0 Likes on 0 Posts
Thank you Vilas
applecrumble is offline  
Old 2nd Feb 2018, 11:33
  #4 (permalink)  
 
Join Date: Jan 2016
Location: UK
Posts: 3,780
Received 65 Likes on 40 Posts
Originally Posted by applecrumble
Does an engine out SID have any influence over the rad nav page?
Yes.

If your emergency turn takes place at a set distance from a DME, or you are proceeding to a VOR/NDB or radial/distance to hold, then I am going to be putting that in the RadNav page. Especially if the SID doesn't require any hard tuning of navaids. Often the navaids auto-tuned in the box are not the ones you need for the EOSID.

Whilst it is in the secondary, and when the Bus loses an engine it should overlay the secondary onto your ND, I still would like raw data backup there ready. Just incase.

An EFATO, especially with a critical emergency turn is not the time to be relying on something with no redundancy because you've not set it up. (I've had in the sim in the past where the other guy has hit Delete Secondary instead of Activate Secondary. It wasn't a big deal because I was already following the raw data. It could have been a bigger deal if I hadn't though)
LlamaFarmer is offline  
Old 2nd Feb 2018, 11:57
  #5 (permalink)  
Thread Starter
 
Join Date: Mar 2017
Location: London
Posts: 169
Likes: 0
Received 0 Likes on 0 Posts
I agree with all of that. I actually meant does it change the auto tuning of the rad nav page but this isn't the case.
applecrumble is offline  
Old 2nd Feb 2018, 12:17
  #6 (permalink)  
 
Join Date: Jan 2016
Location: UK
Posts: 3,780
Received 65 Likes on 40 Posts
Ah I misunderstood then.

I don't know if it does influence it, certainly from experience if there are multiple terrestrial navaids nearby, it doesn't seem to always pick the most useful ones, whether thats for the normal SID or the EOSID.
LlamaFarmer is offline  
Old 2nd Feb 2018, 14:30
  #7 (permalink)  
 
Join Date: Jun 2007
Location: Wanderlust
Posts: 3,404
Likes: 0
Received 0 Likes on 0 Posts
Rad nav auto tuning logic keeps changing auto tuned VORs. If for any reason including EOSID you want to hold on to it for longer you should manually tune it.
vilas is offline  
Old 14th Nov 2018, 18:39
  #8 (permalink)  
 
Join Date: Nov 2018
Location: italy
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Hello,
a bit late reply..
My OMB says:
"if the FUEL MODE SEL pb-sw is unduly left in the MAN position on ground, when the CTR TK L+R XFR pb-sw are not in the OFF position, there is the possibility of fuel spillage. In this configuration, the center tank fuel transfer will not stop when the wing tank become full."
Cheers
Nicola18 is offline  
Old 14th Nov 2018, 20:25
  #9 (permalink)  
 
Join Date: Jul 2007
Location: uk
Posts: 777
Received 0 Likes on 0 Posts
Nicola18: ????????
Meikleour is offline  
Old 14th Nov 2018, 20:52
  #10 (permalink)  
 
Join Date: Nov 2018
Location: italy
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
sorry wrong post!!
Nicola18 is offline  
Old 18th Nov 2018, 08:54
  #11 (permalink)  
 
Join Date: Sep 2011
Location: FL390
Posts: 238
Likes: 0
Received 0 Likes on 0 Posts
Ultimately, it's only guidance. I used to do DATA, INIT A, INIT B, FPLN, RAD NAV, PROG, PERF, FUEL PRED (ie, INIT B now route data is in), and then SEC. Made a hat shape on the buttons. My brain doesn't work with mnemonics.

At least Airbus offers guidance. The Boeing FMC starts well with prompts leading you through each step and then sort of peters out just as you approach the critical data entry point. I'm always wondering what I've forgotten to do.
Fursty Ferret is offline  
Old 19th Nov 2018, 04:46
  #12 (permalink)  
 
Join Date: Jun 1999
Location: Oztrailia
Posts: 2,991
Received 14 Likes on 10 Posts
A350 is much easier and like a Boeing leads you along nicely.

Bloody A330 is a mess.
ACMS is offline  
Old 19th Nov 2018, 07:32
  #13 (permalink)  
 
Join Date: Nov 2002
Location: United States
Posts: 1,051
Likes: 0
Received 0 Likes on 0 Posts
Llama Farmer

Your comment below is , with respect nonsense . One of the nicest features of the Airbus is the EOSID database is independent of the Secondary .In the event ECAM detects ENG FAIL .The EOSID in the Nav Database will appear as a TMPY flight plan REGARDLESS of what is in the secondary flight plan which can be inserted from the MCDU or flown around in heading . If there is a common waypoint in your SID and EOSID then NAV is immediately available and away you go .

The EOSID has NO relationship to the secondary unless you programme it to have an EOSID in it . If you don't the EOSID is always available when ECAM detects ENG FAIL .

This is one of the most mis-understood aspects of the Airbus FMGC , i have pointed this out to dozens if not hundreds of colleagues over the years .

Easy easy to check my thesis above .

On Ground , Delete secondary , select PLAN on your NAV display , look at departure airport end of the FLT PLN , low and behold .Yellow EOSID line .
Have explained this to countless TRI /TRE etc over the years as well .


"Yes.

If your emergency turn takes place at a set distance from a DME, or you are proceeding to a VOR/NDB or radial/distance to hold, then I am going to be putting that in the RadNav page. Especially if the SID doesn't require any hard tuning of navaids. Often the navaids auto-tuned in the box are not the ones you need for the EOSID.

Whilst it is in the secondary, and when the Bus loses an engine it should overlay the secondary onto your ND, I still would like raw data backup there ready. Just incase.

An EFATO, especially with a critical emergency turn is not the time to be relying on something with no redundancy because you've not set it up. (I've had in the sim in the past where the other guy has hit Delete Secondary instead of Activate Secondary. It wasn't a big deal because I was already following the raw data. It could have been a bigger deal if I hadn't though)"
Nil further is offline  
Old 19th Nov 2018, 08:22
  #14 (permalink)  
 
Join Date: Apr 2004
Location: United States of Europe
Age: 40
Posts: 502
Likes: 0
Received 0 Likes on 0 Posts
Partially correct. When an EO is detected, yes the EOSID will be displayed on the ND.
However a TMPY FPL with an *insert prompt will appear only when a common leg/waypoint exists between the SID and EOSID before the diversion point. This is a design feature but only on few occasions will you be able to see this at work. In your network (easyjet) you will be able to see this off LEMD 36L where SSY is a common waypoint for both the SID and the EOSID.
OPEN DES is offline  
Old 19th Nov 2018, 08:33
  #15 (permalink)  
 
Join Date: Nov 2002
Location: United States
Posts: 1,051
Likes: 0
Received 0 Likes on 0 Posts
Isn't the point that the OP and responders seem to think that the Secondary is the source of the EOSID , which i incorrect . Secondly that as you say the ND will always display the yellow EOSID for you to fly if ENG FAIL is detected ?

You are correct on your expansion of my point , i prefer your explanation of the common waypoints and the divergent point . Ta !

I'm still amazed by the folks out there with thousands of hours on type who don't know about this feature .
Nil further is offline  
Old 19th Nov 2018, 09:38
  #16 (permalink)  

Only half a speed-brake
 
Join Date: Apr 2003
Location: Commuting not home
Age: 46
Posts: 4,319
Received 3 Likes on 3 Posts
70% of worlds fleet is not utilizing the EOSID feature. And that for very practical and valid reasons. When needed, just punch the EFP into the secondary, and then have the NAVAIDS hardtuned, now and then.

Some of us use the EOSID term, instead of the proper EFP one. There is nothing Standard about the, for starters. I can see how that got you confused and make misinterpret the previous posts.

​​​​​​It seems though you never checked why you are the unique one among the TREs?

​​​​​​
FlightDetent is offline  
Old 20th Nov 2018, 10:34
  #17 (permalink)  
 
Join Date: Nov 1999
Location: UK
Posts: 2,493
Received 101 Likes on 61 Posts
@ Nil Further,

We flew A320, 321, and 330, but I have never seen EOSID. Nor, for that matter EFP. We just had Flight plan and Secondary flight plan.

If there was a complicated emergency turn/SID, we would construct it in the Secondary.

Perhaps EOSID is only a customer option or a relatively modern development?
Uplinker is offline  
Old 20th Nov 2018, 12:28
  #18 (permalink)  
 
Join Date: Nov 2002
Location: United States
Posts: 1,051
Likes: 0
Received 0 Likes on 0 Posts
Dunno about any of that ?

Ive been flyings the Airbus for 12 years only the Honeywell FMGS equipped version and its always had the EOSID feature .I think you are correct that it is a customer option ..

My understanding of the Secondary design was flexibility to construct alternative departure routings and runways before engine start and indeed I'm told that many colleagues in North America use precisely this function as they operate a lot from multi runway airfields .

Either way interesting stuff but I do remain surprised by the amount of people operating the aircraft equipped with this feature who have no idea what it is or its independence from whatever is in the Secondary .

Safe Flying to all .
Nil further is offline  
Old 20th Nov 2018, 14:45
  #19 (permalink)  
 
Join Date: Nov 1999
Location: UK
Posts: 2,493
Received 101 Likes on 61 Posts
We had both THALES and Honeywell, but no EOSID.

Regarding your last paragraph; I once started a thread on a company forum for pilots to write about tech stuff including features and shortcuts they had discovered in the FMGC/S. It was not popular with the managers for some reason, and got killed off.
Uplinker is offline  
Old 20th Nov 2018, 18:41
  #20 (permalink)  
 
Join Date: Aug 2013
Location: PA
Age: 59
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
EOSID depends on whether your company has paid for it or not.
underfire is offline  


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.