TM 1-1510-225-10 2-135 3.   Install     rudder     lock     pin     through     floor mounted    door,    forward    of    pilot's   seat, ensuring rudder is in neutral position. 4.   Reverse    steps    1    through    3    above    to remove control lock.  Store control lock. 2-101.  INSTALLATION OF PROTECTIVE COVERS. The  crew  will  ensure  that  the  aircraft  protective covers are installed when leaving the aircraft. 2-102.  MOORING. The aircraft is moored to ensure its immovability, protection, and security under various weather conditions.    The  following  paragraphs  give,  in  detail, the instructions for proper mooring of the aircraft. a.   Mooring Provisions. Mooring points, Figure 2-47,    are    provided    beneath    the    wings    and    tail.   Additional  mooring  cables  may  be  attached  to  each landing    gear.        General    mooring    equipment    and procedures necessary to moor the aircraft, in addition to the following, are given in TM 1-1500-204-23. 1.   Use  mooring  cables  of  1/4  inch  diameter aircraft  cable  and  clamp  (clip-wire  rope), chain,    or    rope    (3/ 4    inch    diameter    or larger).  Length of the cable or rope will be dependent   upon   existing   circumstances.   Allow  sufficient  slack  in  ropes,  chains,  or cable to compensate for tightening action due   to   moisture   absorption   of   rope   or thermal contraction of cable or chain.  Do not  use  slipknots.    Use  bowline  knots  to secure aircraft to mooring stakes. 2.   Chock the wheels. b.  Mooring Procedures for High Winds.    Structural damage can occur from high velocity winds; therefore,   if   at   all   possible,   the   aircraft   should   be moved   to   a   safe   weather   area   when   winds   above 75 knots  are  expected.    Moored  aircraft  condition  is shown  in  Figure  2-47.    If  aircraft  must  be  secured, perform the following steps. 1.   After   aircraft   is   properly   located,   place nose  wheel  in  centered  position.    Point aircraft  into  wind,  or  as  nearly  so  as  is possible within limits determined by locations  of  fixed  mooring  rings.    When necessary, a 45-degree variation of direction  is  considered  to  be  satisfactory.   Locate  each  aircraft  at  slightly  more  than one   wing   span   distance   from   all   other aircraft.        Position    nose    mooring    point approximately  3  to  5  feet  downwind  from ground mooring anchors. 2.   Deflate  nose  wheel  shock  strut  to  within 3/4 inch of its fully deflated position. 3.   Fill    all    fuel    tanks    to    capacity,    if    time permits. 4.   Place  wheel  chocks  fore  and  aft  of  main gear  wheels  and  nose  wheel.    Tie  each pair  of  chocks  together  with  rope  or  join together    with    wooden    cleats    nailed   to chocks  on  either  side  of  wheels.    Tie  ice grip    chocks    together    with    rope.        Use sandbags in lieu of chocks when aircraft is moored on steel mats.  Set parking brake as applicable. 5.   Tie    aircraft    down    by    utilizing    mooring points    shown    in    Figure    2-47.       Make tiedown  with  1/4-inch  aircraft  cable  using two  wire  rope  clips,  or  bolts  and  a  chain tested   for   a   3000-pound   pull.      Attach tiedowns so as to remove all slack.  Use a 3/4-inch  or  larger  manila  rope  if  cable  or chain  tiedown  is  not  available.    If  rope  is used for tiedown, use anti-slip knots (such as bowline knot) rather than slip knots.  In the  event  tiedown  rings  are  not  available on  hard  surfaced  areas,  move  aircraft  to an  area  where  portable  tiedowns  can  be used.  Locate anchor rods at points shown in  Figure  2-47.    When  anchor  kits  are  not available,  use  metal  stakes  or  dead-man type anchors, providing they can successfully   sustain   a   minimum   pull   of 3000 pounds. 6.   In event nose position tiedown is considered  to  be  of  doubtful  security  due to  existing  soil  condition,  drive  additional anchor   rods   at   nose   tiedown   position.   Place padded work stand or other suitable support   under   the   aft   fuselage   tiedown position and secure. 7.   Place  control  surfaces  in  locked  position and  trim  tab  controls  in  neutral  position.   Place wing flaps in up position. 8.   The    requirements    for    dust    excluders, protective  covers,  and  taping  of  openings will    be    left    to    the    discretion    of    the responsible    maintenance    officer    or    the pilot of the transient aircraft.