TM 1-1510-225-10 2-133 b.  Ground Handling Safety Practices.   Aircraft equipped   with   turboprop   engines   require   additional maintenance   safety   practices.      The   following   list   of safety  practices  should  be  observed  at  all  times  to prevent  possible  injury  to  personnel  and/or damaged or destroyed aircraft: 1.   Keep intake air ducts free of loose articles such as rags, tools, etc. 2.   Stay clear of exhaust outlet areas. 3.   During  ground  run-up,  ensure  the  brakes are firmly set. 4.   Keep  area  fore  and  aft  of  propellers  clear of maintenance equipment. 5.   Do  not  operate  engines  with  flight  control surfaces in the locked position. 6.   Do   not   attempt   towing   or   taxiing   of   the aircraft  with  flight  control  surfaces  in  the locked position. 7.   When   high   winds   are   present,   do   not unlock the control surfaces until prepared to properly operate them. 8.   Do    not    operate    engines    while    towing equipment  is  attached  to  the  aircraft,  or while the aircraft is tied down. 9.   Check  the  nose  wheel  position.    Unless  it is in the centered position, avoid operating the engines at high power settings. 10.    Hold     control     surfaces     in     the     neutral position    when    the    engines    are    being operated at high power settings. 11.    When moving the aircraft, do not push on propeller   deicing   boots;   damage   to   the heating elements may result. c.   Moving Aircraft on Ground.  Aircraft on the ground    shall    be    moved    in    accordance    with    the following: (1)   Taxiing.    Taxiing  shall  be  in  accordance with Chapter 8. CAUTION When the aircraft is being towed, a qualified   person   should   be   in   the   pilot's seat   to   maintain   control   by   use   of   the brakes.  When towing, do not exceed nose gear  turn  limits,  Figure  2-46.    Avoid  short radius turns, and always keep the inside or pivot  wheel  turning  during  the  operation.   Do    not    tow    aircraft    with    rudder    locks installed,   as   severe   damage   to   the   nose steering linkage can result.  When moving the   aircraft   backwards,   do   not   apply   the brakes  abruptly.    Tow  the  aircraft  slowly, avoiding    sudden    stops,    especially    over snowy, icy, rough, soggy, or muddy terrain.  In Arctic climates, the main gears must tow the aircraft because an immense breakaway  load,  resulting  from  ice,  frozen tires,   and   stiffened   grease   in   the   wheel bearings, may damage the nose gear. Do   not   tow   or   taxi   aircraft   with   deflated shock struts.  (2)   Towing.  Towing lugs are provided on the upper torque knee fitting of the nose strut.  When it is necessary  to  tow  the  aircraft  with  a  vehicle,  use  the vehicle  tow  bar.    Never  exceed  the  turn  limit  arrows displayed  on  the  placard  located  on  the  nose  gear assembly.  Refer to Figure 2-46. d.  Ground  Handling  Under  Extreme  Weather Conditions.   Extreme weather conditions necessitate particular  care  in  ground  handling  of  the  aircraft.    In hot,  dry,  sandy,  desert  conditions,  special  attention must be devoted to finding a firmly packed parking and towing  area.    If  such  areas  are  not  available,  steel mats or an equivalent solid base must be provided for these purposes.  In wet, swampy areas, care must be taken to avoid bogging down the aircraft.  Under cold, icy,  Arctic  conditions,  additional  mooring  is  required, and    added    precautions    must    be    taken    to    avoid skidding during towing operations.