Center Tank Test inop?

[ajwagner]

Hi, when I move the "Center Tank Test" switch during preflight (any version of the F28), nothing happens and the gauge does not move. Am I missing something?

Thanks!

[GroverJ41]

Is there fuel in the centre tank? The test function puts the gauge to Zero (same as the wing tanks). The test is to force the needle to zero and then, when the Test switch is released, to check that the gauge returns to the same and correct value. If there's no fuel in the tank then the Test won't appear to do anything.

[ajwagner]

Thank you! That was my problem. I thought it would cause the gauge to go to full when testing. The tank was indeed empty. Trying it with fuel in the center tank let everything work fine. Thanks again