paulxyouxdunce 10 Posted December 10, 2019 Share Posted December 10, 2019 Noticed the MCDU is showing a fuel value 20k lbs lower than what is actually in my tanks. Causing the destination FOB value to be a negative one which is incorrect. I have attached an image to show the comparison between the two values. Please login to display this image. Link to comment Share on other sites More sharing options...
Budbud 4 Posted December 10, 2019 Share Posted December 10, 2019 Hi, I have the same issue. Right now, just passed a waypoint with 20.6T indicated on the first line of the leg page (last waypoint) while the real quantity on board was 28.1T. For info, the value FF+FQ on the fuel pred page is off by only 0.1T from the quantity indicated on the fuel page of the lower ECAM. Link to comment Share on other sites More sharing options...
Deputy Sheriffs Secondator 643 Posted December 10, 2019 Deputy Sheriffs Share Posted December 10, 2019 Did you have the correct actual fuel figure set on your INIT B page. on ECAM the FOB value is measured directly from the tanks while on the FMGS the fuel is calculated from the INIT B value. If the INIT B value is not same as the actual fuel on board value, the FMGS calculations will be wrong. Link to comment Share on other sites More sharing options...
bheidema 0 Posted December 10, 2019 Share Posted December 10, 2019 I am having the same issue. All INIT pages were set up correctly. Indications and predictions are fine until passing the first waypoint but then a discrepancy develops like mentioned above. Link to comment Share on other sites More sharing options...
paulxyouxdunce 10 Posted December 10, 2019 Author Share Posted December 10, 2019 5 hours ago, Secondator said: Did you have the correct actual fuel figure set on your INIT B page. on ECAM the FOB value is measured directly from the tanks while on the FMGS the fuel is calculated from the INIT B value. If the INIT B value is not same as the actual fuel on board value, the FMGS calculations will be wrong. Yes, as bheidema said everything was fine until passing the first waypoint. Link to comment Share on other sites More sharing options...
ComSimPilot 77 Posted December 10, 2019 Share Posted December 10, 2019 Same here. Please login to display this image. Link to comment Share on other sites More sharing options...
Deputy Sheriffs Secondator 643 Posted December 11, 2019 Deputy Sheriffs Share Posted December 11, 2019 Thanks for the feedback. We are investigating this issue as well. Link to comment Share on other sites More sharing options...
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