PART I-DESCRIPTIVE

	    26.  Wheel brakes

          (i)    The brakes are operated by the toe action on the rudder
                 pedals.  Brake pressure is supplied from the brake master
                 cylinders, supplemented by pressure from the hydraulic
                 system.  In the event of failure of the hydraulic system
                 the brakes function through conventional action of the
                 brakes master cylinders when toe pressure is applied to
                 the pedals.
          (ii)   A parking brake handle (5) is located on the left side
                 of the instrument panel outboard of the undercarriage
                 control.  The brakes are set for parking by pressing the
                 toe pedals and then pulling the handle fully out before
                 releasing the toe pedals.  The brakes may be released by
                 either pushing the toe pedals or pushing the brake handle
                 fully in.

	    27.  Instruments

          (i)    Airspeed indicator
                 The airspeed indicator (10) has a red and yellow striped
                 needle which moves to indicate the airspeed correspond-
                 ing to the limited Mach number at the existing altitude;
                 clockwise movement of the pointer is limited by a
                 stop which is pre-set at the maximum I.A.S. limitation.
                 When the I.A.S. needle coincides with the striped needle
                 the aircraft is moving at the maximum permitted I.A.S.
                 or the critical Mach number whichever is less.  On some
                 aircraft a mark on the A.S.I. at 185 knots indicates the
                 max. airspeed for lowering flaps or undercarriage.
          (ii)   Accelerometer
                 An accelerometer (9) indicates all positive and negative
                 G loads.  Three pointers are fitted, one indicating the
                 maximum positive G load imposed during a given period,
                 the second giving the maximum negative G load imposed
                 whilst the third gives the instantaneous loading on the
                 aircraft.  The instrument may be reset by pushing the
                 small knob on the case.
          (iii)  Artificial horizon
                 The artificial horizon (21) has an OFF indicator flag
                 which appears at the top right of the instrument when
                 the gyro is not up to speed or when power is not
                 supplied.  It also has a caging knob to permit quick erec-
                 tion after toppling.  The caging knob should be pulled
                 out slowly to avoid damaging the instrument.  If the
                 artificial horizon is erected in any attitude other than

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