TM 1-1510-225-10 8A-25 surfaces of the wing.  In the event of windshield icing, reduce airspeed to 226 knots or below. h.  Descent.          Use     normal     procedures     in Section II.      Brake   deicing   should   be   considered   if moisture   was   encountered   during   previous   ground operations  or  in  flight,  in  icing  conditions  with  gear extended. i.    Landing.    Landing  on  an  icy  runway  should be   attempted   only   when   absolutely   necessary   and should not be attempted unless the wind is within 10 of   runway   heading.      Application   of   brakes   without skidding  the  tires  on  ice  is  difficult.    In  order  not  to impair pilot visibility, reverse thrust should be used with caution when landing on a runway covered with snow or  standing  water.    Use  procedures  in  Section  II  for normal landing. j.    Engine Shutdown.   Use  normal  procedures in Section II. k.  Before  Leaving  Aircraft.    When  the  aircraft is parked outside on ice or in a fluctuating freeze-thaw temperature condition, the following procedures should be  followed  in  addition  to  the  normal  procedures  in Section II.  After wheel chocks are in place, release the brakes to prevent freezing.  Fill fuel tanks to minimize condensation, remove any accumulation of dirt and ice from    the    landing    gear    shock    struts,    and    install protective  covers  to  guard  against  possible  collection of snow and ice. 8A-57.  DESERT OPERATION AND HOT WEATHER OPERATION. Dust,  sand,  and  high  temperatures  encountered during    desert    operation    can    sharply    reduce    the operational life of the aircraft and its equipment.  The abrasive   qualities   of   dust   and   sand   upon   turbine blades  and  other  moving  parts  of  the  aircraft  and  the destructive effect of heat upon the aircraft instruments will    necessitate    hours    of    maintenance    if    basic preventive  measures  are  not  followed.    In  flight,  the hazards  of  dust  and  sand  will  be  difficult  to  escape, since   dust   clouds   over   a   desert   may   be   found   at altitudes   up   to   10,000   feet.      During   hot   weather operations,  the  principal  difficulties  encountered  are high   turbine   gas   temperatures   (ITT)   during   engine starting, overheating of brakes, and longer takeoff and landing  rolls  due  to  the  higher  density  altitudes.    In areas  where  high  humidity  is  encountered,  electrical equipment  (such  as   communication   equipment   and instruments)    will    be    subject    to    malfunction    by corrosion, fungi, and moisture absorption by nonmetallic materials. a.  Preparation for Flight.  Check the position of the aircraft in relation to other aircraft.  Propeller sand blast can damage closely parked aircraft.  Check that the  landing  gear  shock  struts  are  free  of  dust  and sand.  Check the instrument panel and general interior for dust and sand accumulation.  Open main entrance door  and  cockpit  vent  storm  windows  to  ventilate  the aircraft. CAUTION N₁   speeds   of   70%   or   higher    may    be required  to  keep  oil  temperatures  within limits. b.  Engine Starting.  Use normal procedures in Section  II.    Engine  starting  under  conditions  of  high ambient   temperatures   may   produce   a   higher   than normal ITT during the start.  The ITT should be closely monitored  when  the  condition  lever  is  moved  to  the LOW  IDLE  position.    If  overtemperature  tendencies are encountered, the condition lever should be moved to IDLE     CUTOFF     position     periodically     during acceleration of gas generator RPM (N₁).  Be prepared to  abort  the  start  before  temperature  limitations  are exceeded. c.  Before   Taxi   and   Engine   Runup.      Use normal  procedures  in  Section  II.    To  minimize  the possibility of damage to the engines during dusty/sandy    conditions,    activate    ice    vanes    if    the temperature is below +15 °C. d.  Taxiing.    Use  normal  procedures  in  Section II.  When practical, avoid taxiing over sandy terrain to minimize  propeller  damage  and  engine  deterioration that  results  from  impingement  of   sand   and   gravel. During  hot  weather  operation,  use  minimum  braking action to prevent brake overheating. e.  Takeoff.    Use  normal  procedures  in  Section II.  Avoid taking off in the wake of another aircraft if the runway surface is sandy or dusty. f.   During  Flight.    Use  normal  procedures  in Section II. g.  Descent.          Use     normal     procedures     in Section II. h.  Landing.          Use     normal     procedures     in Section II. i.    Engine Shutdown.   Use  normal  procedures in Section II.