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missmatch of loadsheet and the values


Stefan Sondermann

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Stefan Sondermann

Hi there,

I am flying offline only but using the ATSU for OFP, fuel and boarding. Now I have the very strange behaviour that the loadsheets are not correct and don't know what I am making wrong.

To reproduce what I make:

I enter the pax and cargo into the boarding ATSU page and then I load the flight plan and enter these values to the init page see pic #1.

Then I enter the OFP data to load the fuel see pic #2.

After a while I get a loadsheet see pic #3.

Then I order to board the aircraft with those values see pic #4.

After a while I get another loadsheet see pic #5.

But those values differ from the real loading of my aircraft see pic #6.

I get a MACTOW of 11.4 on the first loadsheet. I get a EST TOCG on the second loadsheet of 11.44. But the real value from the options->payload is a CG of 29.1

 

And this is a very weird thing. Do I misinterpret MACTOW, TOCG and CG from grossweight? What value do I need to use for performance calculations?

I'm a bit loss here.

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Norman Blackburn
12 minutes ago, Stefan Sondermann said:

I enter the pax and cargo into the boarding ATSU page and then I load the flight plan and enter these values to the init page see pic #1.

Breaking this down, where or how are you loading the flight plan?  Can you explain that part for me please.

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Stefan Sondermann

Yes of course. I am currently flying an unreal leg PHLI<->PAFA. I am using Navdata and there is one waypoint not in the database so the request fails and I enter the route manually:

FLIGHT PLAN ROUTE
N0449F360 LIH5 LIH V15 SOK DCT 30N160W 35N160W 37N160W 40N160W
          45N160W/N0447F370 50N158W 55N155W DCT ODK J125 TED J115
          BGQ/N0449F360 J115 CAWIN LIBER3

for example. The 55N155 ( well 55N58) are not known but this was also the case with navigraph. I enter the route manually completely after importing the OFP (there are no waypoints). Then I type in the pax and cargo into the boarding page and see what my ZFW/CG is. And then the aircraft gets loaded. But the messages from "company" are wrong so I am wondering.

 

Edit: My english is not the best. I can also make a short video if needed.

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Norman Blackburn

"Importing the OFP."

Where is the OFP?  How was it created?  How did you import it?

A video from start to finish may be beneficial.

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Stefan Sondermann

I create a flight plan with PFPX and then save the ofp. I load it then. Ok will make a video.

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Norman Blackburn
1 hour ago, Stefan Sondermann said:

I create a flight plan with PFPX and then save the ofp. I load it then. Ok will make a video.

Can you save the ofp here too please.

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Tim Smith

A TOW Mac of 11.4 seems really odd and I’m pretty sure would be out of limits. Usually sits in around the 30 mark give or take.  I’ve also never seen such a large split between ZFW and TO Mac usually only a couple of %. 

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Stefan Sondermann

Hi there,

sorry for my very late answer; I am only able to fly on weekends because I take my time which is not possible in the week. :)

I searched for a good video editing software for noobs but haven't found one. So I startet up my P3D and noted within notepad what I did and took screenshots.

 

Weather: AS P3D historical weather starting 2021-06-10 0400 localtime (13:00 UTC) at PAFA.
Planning: PFPX PAFA->PHLI
AIRAC: NDP
A321-SL with GSXv2 using Celsius and KG values with Airbus Livery.

A321-SL parked at PAFA in Cold and Dark. Switching on the switches, aligning ADIRUs. When switching on the fuel pumps, power usage goes up (shouldn't it stay at zero as the airbus logic says no engine running?). I use the APU the whole time without using ext. power (back in 2004 where I served at EDDC it was quite common to only use APU on first flight but also when it was cold as there was no ground air available).

While ADIRUs are aligning (no Input, GPS align) I plan the route inside PFPX. I save the OFP and move it to the correct folder (german windows installation). Then I enter the FLT NBR and request an init. The flightplan is not loaded to active sky as mentioned in the manual. I import it manually.

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Then I edit the flightplan (add SID and STAR, insert missing waypoints) to have a full planned route without any missing connections. Then I go to the ATSU and do the init.

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I then go to boarding and call for catering with 100% water and catering 100%. I also enter the pax and cargo to get my ZFW and CG.

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I then go to the init page and plan the fuel (It's round about 1000kg less than PFPX has planned but I know we have tailwind so it's OK). I then accept it.

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Now I go to the ATSU OFP menu and it has my OFP values from the flightplan I think. Looks good so I call the truck. But I edit the STD.

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Water gets only topped to 50% and call for water is without functionality. So I do it in the options->payload of the FMC.

As the batteries stop charging at 27V I do turning them both off and on again to initiate the charging process. But then the batteries are going crazy. Sorry for the watermark at the end of the gif.

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I now wait watching it fueling up. Now I got my first loadsheet... very strange values here. I don't know where the source of the values is, but it is not right.

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At 1330 (20min prior to dep) I start the boarding. Still refueling. But the values on the boarding screen are resetted. So I need to fill them out. While waiting for baggage (only some pax left to be boarded, fueling completed) I get another ACARS where TOCG is wrong.

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After boarding is completed I get the loadsheet with wrong values on MACTOW.

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I use the real values from the options->payload page to get my perf values (using FMCG as I am not familiar with the EFB yet).

Flight Documents.pdf AIB02_PAFA-PHLI.pdf AIB02_PAFA-PHLI.txt

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The ZFW you entered in OFP data is only 12.2, compared to the one on your Init B and Payload page of 60.7. Considering the empty weight of a A320 is about 43ton this is clearly impossible and probably what’s causing all the issues on your load sheet. 

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Koen Meier
5 hours ago, Stefan Sondermann said:

And you can't see the forest for the trees... Thank you guys. Yes... PFPX saves the payload as the ZFW value and I haven't seen it. Thank you so much!

Pfpx should give you zero fuel weight as well.

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Stephen Cooke
6 hours ago, Stefan Sondermann said:

And you can't see the forest for the trees... Thank you guys. Yes... PFPX saves the payload as the ZFW value and I haven't seen it. Thank you so much!

You are using the wrong OFP format in PFPX, it looks like you have EDS in use, change that to PFPX after compute and before release.

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Koen Meier
1 hour ago, Stefan Sondermann said:

Sorry as this is not FSLABS related but what do you mean with EDS?

Eds is a pfpx ofp format however fslabs requires pfpx to output in ofp pfpx text format.

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