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                           PART 1-DESCRIPTIVE

 	each pair.  In the off (up) position the L.P. cocks cut off the
 	flow of fuel from the main tank and should not be used to
 	stop the engines, except in an emergency,as their use may
 	damage the H.P. pumps and aerate the fuel system.
                                             
   (c)  H.P. cock lever

        The H.P. cock levers on either side of the seat in each
        cockpit, beside the L.P. cocks ((3,79)in the front cockpit,
        (89,123) in the rear cockpit).  In the OFF (up) position
        they cut off the supply of fuel to the burners and should
        always be used for stopping the engines.   The appropriate
        one must always be closed in the event of engine failure.
        
   (d)  Balance cock

        The balance cock (29) is on the floor of the front cockpit,
        just aft of the rudder trimming tab control.   It is pulled up
        to interconnect the two compartments of the main tank.
   
   (e)  Drop tank controls
        
        The transfer of fuel from the drop tanks is controlled by a
        T-handle (35)at the top left-hand side of the front cockpit
        instrument panel.   The handle is marked PULL TO
        JETTISON and is inscribed with an arrow.   Pre-Mod.
        1841 , the handle has three positions, WING ON, BELLY,
        ON and OFF.  When set to WING ON, fuel is transferred
        from the wing drop tanks and when set to BELLY ON,
        from the ventral tank.   Mod. 1841 deletes the OFF position.
        A red warning light (30), at the bottom left of the front
        cockpit instrument panel, comes on whenever the pressure
        in the transfer lines falls below 1 lb/sq.in. Pre-Mod. 1841
        this light goes out when the handle is moved to OFF.

   5.   Drop tank jettison controls
        
   (a)  Ventral tank

        The ventral tank is jettisoned by pulling the T-handle
        (35) from any position.   The handle is marked PULL TO
        JETTISON.

   (b)  Wing drop tanks

        The wing drop tanks are jettisoned by pulling back the
        lever (83) on the starboard side of the front cockpit.

12

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