(b)
Examine the openings in the pitot probe, probes installed on the strut or in the engine inlet, and the static ports. Make sure they are clear of ice or snow.
(c)
Make sure there is no ice or snow collected on the landing gear and or in the wheel wells.
(d)
Make sure all the inlets are clear of ice or snow.
(e)
Make sure all the drains are clear and not blocked.
(f)
Make sure the engine compressor can turn freely.
NOTE: If the fan (N1) cannot turn during an engine start
____ because of ice, this can cause heavy damage. When it is possible that water collected in the engine at freezing temperatures, you must make sure the fan (N1) can turn before you start the engine. You can see the low pressure (LP) rotor fan blades turn from the ground. If the wind does not turn the fan, you can turn it by hand. If you will motor the engine to make sure the engine compressor turns, use the procedure in 71-00-00.
(g) Make sure all of the doors, including the doors to the off-wing escape slide compartments, are clear of ice.
I. To Park the Airplane
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S 583-088
WARNING: IF HIGH WINDS ARE POSSIBLE, USE THE PROCEDURE IN 10-11-03 TO
_______
SET THE STABILIZER.
(1)
The area where you will park the airplane must be clear of ice and snow. Chapter 10 gives the full procedures to park the airplane. Use the procedure in Chapter 10 if more steps are necessary because of the weather conditions and length of time the airplane will be parked.
S 583-089
(2)
When it is possible, point the airplane into the direction the wind is usually from.
(a)
Put the wing flaps to the full up position.
(b)
Put the stabilizer position to 4 units of trim (0° stabilizer position).
S 493-090
CAUTION: EXAMINE THE ENGINE INTAKE AREAS IMMEDIATELY AFTER SHUTDOWN FOR
_______ ICE THAT IS THERE. REMOVE THE ICE WHILE THE TEMPERATURE OF THE ENGINE DECREASES AND BEFORE YOU INSTALL THE ENGINE PROTECTIVE PLUGS AND COVERS. IF YOU INSTALL THE PLUGS BEFORE THE TEMPERATURE OF THE ENGINE DECREASES, THE REMAINING HEAT IN THE ENGINE WILL MELT THE ICE TO WATER. THIS WATER WILL FLOW TO THE BOTTOM OF THE FAN SECTION. IT WILL FREEZE AGAIN WHEN THE TEMPERATURE OF THE ENGINE IS BELOW FREEZING. THIS WILL LOCK THE TIPS OF THE FAN LOWER BLADES IN ICE.
(3) Install all the plugs and covers, where available, for the intake or exhaust ducts and the different probes such as the pitot tubes. Use a brush to apply a thin layer of anti-ice fluid to the airplane surface before you install the cover. The covers will not freeze to the airplane if you do this.
J. Engine Operation
S 863-091
(1)
The full procedures to operate the engines in cold weather
conditions are in 71-00-00.
S 663-092
(2)
Large pieces of ice and/or snow that go into the engine inlet can cause damage to the internal engine parts. Remove all the ice or snow from the engine inlet ducts before you start the engines.
S 663-093
(3)
Engine icing can occur when the conditions that follow occur:
(a) There is moisture you can see such as couds, fog, rain, snow, sleet or ice crystals.
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(b) You will do ground operations with the static air temperature below 50°F.
S 663-094
(4)
You must use the thermal anti-icing system for the engine/nacelle when these conditions occur.
S 843-095
(5)
Before you start the engines, make sure there are no fluids around the exhaust areas that can start ignition.
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