When do the A319/320 center tank fuel pumps operate in AUTO?
PHB 9.1.7 A319/320: Normal fuel feed sequencing is automatic. When there is fuel in all tanks, the center tank feeds the engines first (even though the wing tank pumps operate continuously). With the fuel MODE SEL pb in AUTO, the center tank pumps operated for two minutes after both engines are started to confirm center tank pump operation prior to takeoff. After takeoff, the center tank pumps restart when the slats are retracted and continue to operate for five minutes after the center tank is empty or until the slats are extended. With the MODE SEL pb in MAN, the center tank pumps operate continuously. The crew must select the CTR TK PUMP pbs OFF when the center tank is empty. A321: The fuel transfer system controls the flow of fuel from the center tank to the wing tanks, which feed the engines. The tanks empty in the following sequence: ACT transfers fuel into the center tank Center tank transfers fuel into the wing tanks Wing tanks With the MODE SEL pb in AUTO, the Fuel Level Sensi
