PART 1-DESCRIPTIVE

    21.  Undercarriage position indicators
    
    (a)  There is an undercarriage position indicator (58) (113) in
         each cockpit.  When electrical power is available, the indi-
         cators operate as follows:-
              
              Undercarriage locked down	..	3 green lights
              Undercarriage unlocked	..	3 red lights
              Undercarriage locked up	..	All lights out
         
    (b)  If any wheel is not locked down and either throttle is less
         than one-third open, a micro-switch (6) operates and
         warning lights (56) (112) to the right of the indicators
         comes on.  At throttle setting giving 12,500 r.p.m. (approx.)
         these lights will remain on continuously.

    (c)  When the nosewheel is down and locked, a small rod pro-
         trudes about one inch above the nose of the aircraft.

    22.  Flap controls and indicators
    
    (a)  Normal operation

         The hydraulically-operated flaps are controlled by two
         interconnected levers (32) (103), one on the left of each
         instrument panel, marked UP-NEUTRAL-DOWN.  Any
         intermediate flap angle may be selected by moving either
         lever to UP or DOWN as appropriate and, when the flaps
         have reached the desired position, returning the lever to
         NEUTRAL.  The flap lever should be returned to
         NEUTRAL after each operation of the flaps.

    (b)  Emergency operation
         
         If hydraulic pressure fails, the flaps may be raised or
         lowered by operating the handpump after making the
         normal selection.

    (c)  Position indicator
         
         There is an electrically-operated position indicator (34)
         (105) in each cockpit.

    23.  Airbrake controls
    
    (a)  Normal operation

         The hydraulically-operated airbrakes are controlled by
         two interconnected levers (17) (95), one on the port wall of
         each cockpit, below the throttle levers.  The levers are
         marked OUT (aft)-AIRBRAKES-IN (forward).  There is
         no position indicator, the brakes being visible from both
         cockpits.

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