PART 1-DESCRIPTIVE

        gauges represent the contents of the inner port and star-
        board wing tanks respectively, the lower left- and right-
        hand gauges the outer port and starboard sets of tanks,
        and the centre gauge the fuselage tank.  The gauges will
        indicate the contents of their respective tanks when the
        MASTER SWITCH (2) is at FLIGHT.  There are no
        fuel gauges for the wing drop tanks which are the only
        tanks pressurised.  Fuel transfer from the wing drop
        tanks to the fuselage tank will commence when the centre
        gauge reads 80 gallons.  The centre gauge will commence
        to show a drop below this figure when they have been
        emptied.

   (ii) A burner ring pressure gauge (50), which is calibrated in
        hundreds of pounds and records fuel pressure at the
        burner ring, is fitted on the left-hand side of the instru-
        ment panel.  The scale on this gauge is such that accurate
        reading is difficult, furthermore, the burner pressure will
        be influenced by height and r.p.m. and thus it is not possi-
        ble to lay down definite readings for given conditions of
        flight.  This gauge will be deleted by Mod. 680.
 	        
   3.   Fuel booster pump

   (i)  The booster pump is controlled by an ON-OFF switch
        (60) on the electrical panel.
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A.L.3        (ii)  A fuel pressure warning light (19) is above the left-hand
Para. 3|             side of the instrument panel.  This light will come on
  (ii)    |             when the booster pump ceases to deliver fuel; normally
         |             when the booster pump is switched on the warning light
         |             should go out.  The light will be on at all times when
         |             the booster pump is switched off. 
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   4.   Fuel cocks

   (i)  The low pressure fuel cock is controlled by a lever (16)
        which is mounted under the engine control box on the
        port cockpit wall.  It has two positions, marked FUEL
        OFF (down and back) and FUEL ON (forward and up).
        The high pressure fuel cock is controlled by a lever (6)
        mounted outboard of the throttle lever, which must be
        moved forward for fuel ON and back for fuel OFF.  It
        is held in the forward position by a spring catch.  There
        are no separate fuel cocks for the wing drop tanks.
   (ii) Jettisoning of wing drop tanks
        Both wing drop tanks can be jettisoned by pulling up the

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