Lockheed C-5M, Technical Manual

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b. Anti-ice, deice
À
uid should be applied in a
¿
ne spray pattern and not in a solid
À
ooding stream, to prevent excessive
drainage and
À
uid waste.
c. At the completion of spraying operations, all lines must be
À
ushed with cold
À
uid to prevent damage due to freezing.
1.4.3 Anti-Icing, Deicing, and Snow and Frost Removal Procedures. (See Figure 1-32.) Snow and ice accumulations
must be removed from the airplane (especially the control surfaces) prior to
À
ight. Perform anti-icing, deicing, and snow and
frost removal in accordance with the following procedures.
a. Refer to applicable technical orders for equipment being used.
b. Position the truck-mounted servicing platform rotation axis (turret) approximately 55 feet behind each wing and 40
feet outboard of the fuselage. From these positions, all the airplane except the engine nacelles, the forward fuselage,
and part of the wing leading edge can be reached without repositioning the unit.
c. The engine nacelles, the forward fuselage, and the inboard wing leading edges are reached with a truck-mounted
cleaning, deicing, and decontaminating
À
uid spraying unit. The spraying is performed while the unit is operated at the
forward part of the airplane.
1.4.4 Removal of Deposits.
Where hangars and covers cannot be used for prevention of frozen formations on the
airplane, but equipment for heating Speci
¿
cation SAE AMS 1424
À
uid-water solutions is available, removal by hot diluted
deicing
À
uid solutions will be used. Accumulations should be allowed to form and be removed as explained below just after
each precipitation or just before each
À
ight, whichever is most practicable or compatible with the operational mission of the
airplane being deiced.
1.4.5 Removing Frost. Frost can easily be removed by spraying with cold undiluted
À
uid, Speci
¿
cation SAE AMS 1424,
or by spraying with hot diluted
À
uid, Speci
¿
cation SAE AMS 1424.
1.4.6 Removing Ice.
Extreme care shall be exercised at all times to prevent any damage to the airplane surfaces. Sharp instruments
such as picks, knives, or screwdrivers will not be used to loosen the ice formation.
The use of
À
uid, Speci
¿
cation SAE AMS 1424, water mixture heated to 180 - 200 °F (82 - 93 °C) will speed up ice removal
from airplane surfaces. Application of hot diluted
À
uids is best accomplished by spraying a solid stream of
À
uid (not over 40
gallons per minute) to
À
ood the surface of the ice and to wash the loose pieces of ice from the wing. A sufficient amount of
heated
À
uid must be kept on the ice to keep the liquid layer from freezing. The heated
À
uid should be applied at pressures
as high as possible, but not over 300 pounds PSI on metal surfaces. Particular attention must be directed to clearing all ice
from the hinges of control surfaces. Existing cleaning equipment or larger mobile spraying equipment may be modi
¿
ed to
incorporate a means of heating the
À
uid. In the event a hot deicing
À
uid solution cannot be used and it is absolutely
necessary to remove the ice from the airplane, cold undiluted deicing
À
uid may be used. The
À
uid should be sprayed to
assure complete coverage without excessive drainage at 15-minute intervals. Removal of heavy accumulations of ice with
cold deicing
À
uid is an expensive and slow operation and should be used only as a last resort when other means are not
available.
1.5 EXTREME CLIMATIC AND ENVIRONMENTAL INFORMATION.
The following procedures shall be followed when operating under extreme climatic and environmental conditions. Proce-
dures are organized by climatic or environmental condition and de
¿
ne operational considerations for electrical, mechanical,
and hydraulic systems.
1.5.1 Condition: High Winds.
1.5.1.1 Flight Controls Gust Locks (Ailerons, Rudders, and Elevators). Gust locks are an integral part of the
À
ight
controls hydraulic power pack and are installed to dampen sudden
À
ight control movements when hydraulic pressure is
depleted. However, for the internal gust locks to work, the control switches must be in NORM. With the control switches in
TO 1C-5M-2-1
1-32