PART I-DESCRIPTIVE

COCKPIT EQUIPMENT

     31.  Entry to aircraft

          Entry to the cockpit is by means of a special ladder
          supplied as ground equipment.


     32.  Hood operation

     (a)  The hood is opened or closed electrically by means of a
          three-position OPEN-off-SHUT switch (18) under the
          port coaming, provided that the clutch a engaged. The
          clutch is operated by a knob (86) on the starboard
          coaming; when this control is set to FREE the hood can
          be moved by hand.

     (b)  The hood seal is inflated automatically when the hood
          is fully closed with the switch at SHUT, provided that the
          clutch control is set to ENGAGED.
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A.L.4    33.  Hood jettisoning
Para. 33
Page 35  (a)  Pre-mod. 347
                  The hood may br jettisoned by pulling the control handle (40) on the
                  port coaming panel. This action also operates a micro switch which
                  if electrical power is available, automatically lowers the gunsight.
                  The hood will not jettison cleanly unless it is fully closed and the three-
                  position switch is in the off position. An indicator on the port wall
                  shows that the jettison mechanism is locked. The pointer is on the
                  line when indicating safe.

          (b)  Post-mod. 347
                The hood is jettisoned by gas pressure from a jettison gun acting on
                two pistons which unlock the hood rail latches and then push the
                hood upwards. This action may be in initiated by pulling the hood
                jettison handle or will occur if either ejection seat handle is pulled.
                The GGS is automatically lowered, if electrical power is available,
                when the hood jettison handle is pulled but if either ejection seat
                handle is used the GGS must be lowered manually before ejection.
             
         (c)  External emergency release 
               An external jettison control is on the port side of the fuselage. When
               pulled it releases the hood thereby enabling it to be lifted clear
               manually.
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     34.  Cockpit pressurization and heating

     (a)  Control of cockpit pressure is by means of a master
          ON/OFF switch (13) and control of temperature is by
          means of the spring-loaded selector switch (14) both

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