TM 1-1510-218-10
2-135
2-117. PARKING.
Parking is defined as the normal condition under
which the aircraft will be secured while on the ground.
This condition may vary from the temporary expedient
setting of the parking brake and choking the wheels to
the more elaborate mooring procedures described in
Paragraph 2-119. The proper steps for securing the
aircraft shall be based on the time the aircraft will be
left unattended, the aircraft weight, the expected wind
direction and velocity, and the anticipated availability
of ground and aircrews for mooring and/or evacuation.
1. When practical, head the aircraft into the
wind, especially if strong winds are
forecast or if it will be necessary to leave
the aircraft overnight.
2. Set the parking brake, chock the wheels
securely, and release the parking brake.
Do not set parking brakes when the
brakes are hot during freezing ambient
temperatures. Allow brakes to cool before
setting parking brakes.
3. Following engine shutdown, position and
engage the control locks.
4. Cowlings and loose equipment will be
suitably secured at all times when left in
an unattended condition.
2-118. INSTALLATION OF PROTECTIVE COVERS.
The crew will ensure that the aircraft protective
covers are installed.
2-119. 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
2-34, 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 3/8-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 slip knots. 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. Refer to Figure 2-34.
1. After aircraft is properly located, place
nose wheel in centered position. Head
aircraft into the wind, or as nearly so as is
possible
within
limits
determined
by
locations of fixed mooring rings. When
necessary, a 45° variation of direction is
considered to be satisfactory. Locate
each aircraft at slightly more than 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 (wood) 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. Accomplish aircraft tiedown by using
mooring points shown in Figure 2-34.
6. 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. When anchor kits are not available,
use metal stakes or dead-man type
