roundel jsl spacer hunter1
previous thumbnails next

PART IV-EMERGENCY HANDLING


          lb. sq. in. Harsh movements of the power controls or
          use of airbrakes will then deplete the hydraulic accumu-
          lators and lead to Manual reversion. It is therefore
          recommended that if the emergency button is going to be
          used under these conditions power controls be selected
          to Manual first.

     (c)  To raise the undercarriage after use of the emergency
          system, reselect the emergency button and select UP on the
          normal system. If hydraulic pressure is available, the
          undercarriage should retract.

     (d)  If it is necessary to retract the undercarriage whilst the
          aircraft is on the ground, rotate the UP selector button
          clockwise and press.

          NOTE:-1.   This must not be used to retract the under-
                     carriage in the air if it is found that the UP
                     button cannot he pressed in. In this case the
                     wheels must he left down and the aircraft
                     landed.

                2.   If the undercarriage has not been lowered by
                     normal selection the air extractor valve will
                     not be in the correct position. The engine
                     should he shut down at the end of the landing
                     run to prevent overheating.
                     

     87.  Wheel brakes emergency operation

     (a)  The wheel brakes accumulator provides sufficient
          pressure for brake operation during landing down to a
          pressure Of 1,750 lb./sq. in. approximately.

     (b)  If full brake is applied, the maxaret units will deplete the
          accumulators sooner than necessary. It is therefore
          recommended that a visual check of the brake gauge is
          kept and a steady application of approximately 600
          lb./sq. in. is made.  The amount of pressure remaining is
          shown by the top needle of the triple pressure gauge.
          Brakes will fail completely at approximately 1,750
          lb/sq. in.


     88.  Flapless landing

          A normal circuit and approach should he made and the
          threshold crossed at a speed 5 to 10 knots in excess of the
          normal final approach speed.

77

previous thumbnails next