1. Use mooring cables of 1/4 inch aircraft
cable and clamp (clip-wire rope), chain or rope 3/8 inch
or over. Length of the cable or rope will be dependent
upon existing circumstances. Allow sufficient slack in
ropes, chains, or cable to compensate for tightening
Do not set parking brakes when the
action due to moisture absorption of rope or thermal
brakes are hot during freezing
contraction of cable or chain.
ambient temperatures. Allow brakes
to cool before setting parking brakes.
4. To release the parking brakes push in on
the parking brake handle.
Do not use slip knots. Use bowline
knots to secure aircraft to mooring
elevator, rudder, and aileron in neutral position. Install
the control locks as follows:
2. One-piece wheel chocks or wood blocks
may be used to chock the main landing gear wheels.
secure position, slide lock onto control pedestal to
They must be equipped with rope or wood cleats to
prevent operation of levers.
retain them against the wheels.
2. Install elevator and aileron lock pin
vertically through pilot's control column to lock control
In ice or snow conditions, collapsible
ice grip wheel chocks should be
3. Install rudder lock pin through right hand
used. However, sandbags may be
pilot's rudder pedal; then neutralize and lock pedals
used if collapsible chocks are not
available or if parking or mooring the
aircraft on steel mats.
4. Reverse steps 1 through 3 above to
remove control lock. Store control lock.
b. Mooring Procedures for High Winds.
aircraft is to remain securely moored during high velocity
2-96. Installation of Protective Covers.
winds, it is necessary to use the proper size and type of
wheel chock. Since the factor of weight is significant in
While in transit, the crew will insure that the aircraft
is protected during inclement weather. If protective
approximate weight must be known if the aircraft is to be
covers (fig. 2-25) are not on board, steps will be taken to
properly secured. During emergencies, knowledge of
procure them from the airfield maintenance facility.
this information is very useful in selecting the aircraft that
should be tied down first, as a heavy aircraft will better
stand high winds than an empty aircraft.
The aircraft is moored to insure its immovability,
protection, and security under various weather
conditions. The following paragraphs give, in detail, the
instructions for proper mooring of the aircraft.
Structural damage can occur from
high velocity winds; therefore, if at all
are provided beneath the wing, nose, tail and on each
possible, the aircraft should be
main landing gear. General mooring equipment and
moved to a safe weather area when
procedures necessary to moor the aircraft, in addition to
winds above 75 knots are expected.
the following, are given in TM 55-1500-204-25/1.