Lockheed C-5M, Техническое руководство

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1.5.5.22 Starter Air Valve.
If cold temperatures prevent opening of the starter air valve, the valve can be opened manually
by inserting an extension through an access hole in the bottom of the engine cowl into the 3/8-inch manual override socket
drive built into the valve.
1.5.5.23 Hydraulic Winch.
After the airplane has been subjected to cold soaks of 10 hours or more at ground ambient temperatures of -25 °F
(-32 °C) and below, the hydraulic winch may fail unless it is preheated. Even after proper external warming of the
winch, effects from the cold may remain.
On AF83-1285 and up, after long exposure to very cold ambient ground temperatures, some components of the hydraulic
winch may fail because of the high viscosity of the hydraulic
À
uid. The winch and winch compartment should be preheated
for 20 to 30 minutes before winching.
1.5.5.24 Forward and Aft Loading Systems.
a. Prior to operating the forward and aft loading system, ensure accumulations of ice and snow are removed from the
hinge areas of cargo doors, ramps, ramp extensions, ramp extension toes, and areas which interface with these
components.
b. If snow, sleet, or freezing rain has occurred while aft cargo doors have been open, ensure mechanical lock tracks on
side doors are all clear of snow and ice before closing doors.
1.5.5.25 Windshield Heat Control System.
Do not exceed the operating duty cycle of 5 seconds on, 10 seconds off, when operating the COLD START
switch. The windshield heat switches should be in the NORM position when using COLD START switch.
The windshield heat control system will not function automatically if the temperature of the windshield glass is below -40 °F
(-40 °C). The COLD START switch must be used to raise the temperature of the glass into the normal operating range.
Operation of the COLD START switch should be accomplished only while the WINDSHIELD HEAT switches are in
NORM. Touch panels with bare hand to check that heat is being applied.
1.5.5.26 Airplane Interior Warming.
Use the following procedures to warm the airplane interior. (See Figure 1-34.)
Surging of the air conditioning pack (chugging), may occur during operation at temperatures below -25 °F (-32
°C). This is most likely to occur in the left pack after upper compartment temperatures have been stabilized. With
wing isolation valves closed, check the bleed air manifold pressure gages for
À
uctuations to determine the affected
system. Placing any temperature control for the affected system to brie
À
y to HOT will eliminate the condition.
Failure to comply could result in damage to the ducts.
NOTE
While warming the airplane interior spaces can be done relatively quickly, cold soaked component temperatures
will not begin to approach the air temperature for extended periods and may not operate correctly until the units
have been exposed to the warmer interior temperatures for 30 minutes or more.
a. Because of the
À
exibility of the airplane environmental subsystems, operation should be set up in consideration of the
interior areas to be heated, the sequence of heating these areas, the bleed air sources available, and other loads on the
bleed air system.
TO 1C-5M-2-1
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