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FUEL L + R WING TK LO LVL


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Can't tell you the exact figures anymore, but that happens everytime, when the total FOB falls below approx. 14.000kg. It also appears and flickers directly after loading the aircraft from menu, on the ground, before boarding and refueling. 

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3 hours ago, Tobias94 said:

Can't tell you the exact figures anymore, but that happens everytime, when the total FOB falls below approx. 14.000kg. It also appears and flickers directly after loading the aircraft from menu, on the ground, before boarding and refueling. 

Same as this. I just loaded the aircraft from the menu, fuel level is 5760kg

 

Edit: it stopped flickering when the fuel in outer tanks was >~1170kg each

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I am experiencing the same issue with the .10 update. It started on GND before refuelling and appeared around 8:40 into the flight when fuel lvl was below 16 tons total
cOcFSGR.png

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  • 2 months later...

Is this still being looked into ?

Ran into the same thing in version 1.0.2.1, P3D 4.5, fuel levels pretty similar to what Tyrone above posted in his screenshot.
Looks to me that when the fuel level in the inner tanks gets below 4000kgs and the fuel from the outer tanks feeds into the inner tanks and the OUTR TK XFR T TK XFRD message shows up, the caution message FUEL L + R WING TK LO LVL starts flickering replacing the other message. Once the fuel level rose above 4000kgs again through x-feeding from the outer tanks, the flickering stopped.

As more fuel burned off and the fuel level decreased below 4000 the flickering message was back.
 

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  • 2 months later...

Mathijs , It seems that the Fuel transfer rate from the Outer to the Inner tanks is too low. The ECAM alert should be displayed when fuel quantity in the inner tanks is below 2520 Kg. Before that, when the inner tank fuel quantity is below 3500 kg, the outer-to-inner  transfer starts, and keeps the inner tank level between 3500 and 4000 kg. It seems that in cruise flight the transfer rate is low and barely keeps the tank at the level it had when the transfer started. Once in descent,  the transfer rate is higher than the fuel flow and the inner tank quantity gets above 4000 kg and the alert disappears. It's a matter of increasing the transfer rate from the outers to the inners. 

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Hello PMSoares,

That's a good find. The outer tank transfer happens by gravity so logically it should happen at the same rate in all situations as long as the valve is open. We'll check this and add on our issue tracker if we find anything.

 

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I checked this with the developer responsible for this. The mass flow rate of OUTR TK XFR should not be any slower during cruise than what it is during descend on our code.

However something that crossed through our minds that could give the illusion of the mass flow rate being slower because of the inner tanks not filling as quickly is the overall fuel consumption during cruise which is nearly 3000 kg/hr more since you need to maintain some power in engines to maintain level flight. On descend you are on idle thrust with around 2600 kg/hr fuel flow to the engines. So during cruise the fuel consumption is nearly twice as fast as during descend which would mean that even with a constant mass flow rate, it would appear that inner tanks fill up slower (or don't fill at all) if since the engines are using more fuel from the tanks during cruise.

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