PPRuNe Forums

PPRuNe Forums (https://www.pprune.org/)
-   Tech Log (https://www.pprune.org/tech-log-15/)
-   -   Fuel temperature limits when jp4 and jet b fuel are used (https://www.pprune.org/tech-log/623759-fuel-temperature-limits-when-jp4-jet-b-fuel-used.html)

trancada 21st Jul 2019 14:09
Fuel temperature limits when jp4 and jet b fuel are used
 
In the Airbus 320 FCOM in the limitations chapter it says:

"If the Wing Fuel Temperature exceeds 30ºC at engine start, the altitude must be limited to 35000ft, until center tank is empty “. As it is in the tittle WHEN JP4 and JET B FUELS are used.

My question is: If the center tanks are already empty before take-off with FL should you climb? Is the OPTIMUM, or limit to FL350, until the fuel cools down? What is recommended?

sonicbum 21st Jul 2019 14:26
Originally Posted by trancada (Post 10524261)
In the Airbus 320 FCOM in the limitations chapter it says:

"If the Wing Fuel Temperature exceeds 30ºC at engine start, the altitude must be limited to 35000ft, until center tank is empty “. As it is in the tittle WHEN JP4 and JET B FUELS are used.

My question is: If the center tanks are already empty before take-off with FL should you climb? Is the OPTIMUM, or limit to FL350, until the fuel cools down? What is recommended?
Reason : At high altitude with high fuel temperature, the pressure supplied by the center tank pumps becomes lower than the pressure supplied by the wing tank pumps.
You basically want to make sure you burn fuel from the center tank first and then from the wing tanks. If there is no fuel in the center tanks, happy days.
The limitation applies to the A320s with the "classic" fuel system.



All times are GMT. The time now is 14:53.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.