PART I - DESCRIPTIVE

     (c)   Although all internal tanks are gauged, and the contents
           reading should fall when fuel from those tanks is being
           used, when transfer from the drop tanks (which are un-
           gauged)is taking place the fuel contents gauge should
           show a constant reading.  Should the air pressure fail,
           very little fuel will transfer from the drop, wing or rear
           tanks and TRANS. PRESS indicators (93) will indi-
           cate failure by showing cross-line.  At the same time the
           contents gauge transmitters in the rear and wing tanks
           will become inoperative and the gauges will only indicate
           the contents of the front tanks, i.e., the amount of fuel
           available to the engine.  If only one side of the air         
           
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