Lockheed C-5M, Technical Manual

Page: 73 / 100

OFF, gust lock protection is not available. To prevent possible damage to the
À
ight control surfaces, ensure that all
À
ight
control switches on the pilot overhead panel are left in NORM or AUTO, as required, except that INBD ELEVATOR LEFT
SYS 3 and RIGHT SYS 2 are in OFF. (See Figure 1-33 for
À
ight control switch locations.)
1.5.1.2 Door Systems.
a. When winds are in excess of 35 knots from any direction, do not operate forward and/or aft door system.
b. If open, forward and/or aft doors may remain open in a static condition with winds up to 70 knots from any direction.
1.5.1.3 Open Nose/Tail.
If both ends of the airplane are open or are to be opened with the nose or tail pointed into the
wind, open the end pointed into the wind last or close that end
¿
rst to eliminate wind tunnel effect.
1.5.2 Condition: Blowing Sand or Dust. When exposed to blowing sand or dust, the following items shall be considered
for proper operation and maintenance of the airplane:
a. If blowing sand or dust is present or anticipated, park airplane with nose pointed into prevailing or forecasted wind
(
À
aps and slats retracted) to prevent accumulation of sand or dust along wing trailing edge and on control surface
actuators. Airplane should be positioned to avoid blasting adjacent buildings and equipment with sand or dust during
engine start.
b. When operating in a dusty environment, check for and remove accumulations of dust at avionics equipment area and
at instrument system equipment areas inside airplanes.
c. When operating in a dusty environment, check for and remove accumulations of dust at
À
ight control system equip-
ment areas.
d. When operating in a dusty environment, check for and remove accumulations of dust from hydraulic actuator pistons,
and hydraulic and electrical controls.
e. To minimize entry of dust, always fair the
À
ight control surfaces after completion of maintenance functions and ensure
access panels are secured.
1.5.3 Condition: Heavy Rain.
a. Operation of the APU in heavy rain may result in high moisture content in the air provided to the air conditioning
packs. To avoid creation of excessive fog in the airplane, the compartment temperature control rheostats should be
adjusted in small increments, and the temperature should be allowed to stabilize before making additional changes.
b. In tropical climates, after lengthy rainfalls, cycle the
À
ight control surfaces a sufficient number of times to ensure
drainage of any water that may have collected.
c. To minimize entry of rain, always fair the
À
ight control surfaces after completion of maintenance functions and ensure
access panels are secured.
1.5.4 Condition: Extreme Heat.
1.5.4.1 Avionics Cooling.
For continuous ground operation of core avionics equipment (greater than 30 minutes) with
outside ambient temperatures in excess of 90 °F (32 °C), use cool relief crew compartment ambient air to supplement hot
cargo compartment ambient air for avionics cooling or provide auxiliary cooling from ground support equipment.
1.5.4.2 Interior Cooling. Use the following procedures to cool the airplane interior in extreme hot climates:
a. Flight station and relief crew compartments should be cooled
¿
rst as follows:
(1) Operate left air conditioning pack from both APU.
(2) Set air
À
ow to MAX UPR DECK.
TO 1C-5M-2-1
1-33