AFB balatón
Is an automatic system ( sb 28-58 or production) to alter the baseline fuel schedule . When both center tank boost pumps are in AUTO position ,float sws cycle the center tanks pumps on and off to burn a portion of the main wing tank fuel prior to comlpete burn of the center tank. AFB reduce the probability of ice formation due to cold soaked fuel,by reducing the quantity of fuel remaining in the main tanks upon landing.