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. In the event towing lines are
necessary, use towing lugs on the main landing gear.
Use towing lines long enough to clear nose and/or
tail by at least 15 feet. This length is required to pre-
vent the aircraft from overrunning the towing vehi-
cle or fouling the nose gear.
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. The partic-
ular problems to be encountered under adverse
weather conditions and the special methods
designed to avoid damage to the aircraft are covered
by the various phases of the ground handling proce-
dures included in this section of general ground han-
dling instructions. (Refer to TM 55-1500-204-25/1.)
2-104. 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 tempo-
rary expedient of setting the parking brake and
chocking the wheels to the more elaborate mooring
procedures described under Mooring. The proper
steps for securing the aircraft must be based on the
time the aircraft will be left unattended, the aircraft
weights, the expected wind direction and velocity,
and the anticipated availability of ground and air
crews for mooring and/or evacuation. When practi-
cal head the aircraft into the wind, especially if
strong winds are forecast or if it will be necessary to
leave the aircraft overnight. Set the parking brake
and chock the wheels securely. Following engine
shutdown, position and engage the control locks.
NOTE
Cowlings and loose equipment will be
suitably secured at all times when left in
an unattended condition.
TM 55-1510-221-10
a.
The parking brake system for the aircraft
incorporates two lever-type valves, one for each
wheel brake. Both valves are closed simultaneously
by pulling out the parking brake handle. Operate the
parking brake as follows:
1.
Depress both brakes.
2. Pull parking brake handle out. This
will cause the parking brake valves to
lock the hydraulic fluid under pressure
in the parking brake system, thereby
retaining braking action.
3. Release brake pedals.
Do not set parking brakes when the
brakes are hot during freezing ambient
temperatures. Allow brakes to cool before
setting parking brakes.
4. To release the parking brakes push in
on the parking brake handle.
b. The control lock (fig. 2-18) holds the
engine and propeller control levers in a secure posi-
tion. It also holds the elevators and rudder at neutral
position and the ailerons in a staggered attitude, one
slightly "up" and the other slightly "down". Install
the control locks as follows:
1.
2.
3.
4.
With engine and propeller control
levers in secure position, slide lock
onto control pedestal to prevent opera-
tion of levers.
Install elevator and aileron lockpin ver-
tically through pilot’s control column
to lock control wheel.
Install rudder lock pin through flapper
door forward of pilot’s seat, making
sure rudder is in neutral position.
Reverse steps 1 through 3 above to
remove control lock. Store control lock.
2-105. INSTALLATION OF PROTECTIVE COV-
ERS.
The crew will insure that the aircraft protective
covers are installed.
2-106. MOORING.
The aircraft is moored to insure its immovabil-
ity, protection, and security under various weather
2-87
