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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
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WARNING:_______ALWAYS WEAR GLOVES WHEN YOU TOUCH THE FAN BLADES. THE FAN BLADES ARE SHARP AND CAN CAUSE INJURY TO YOUR HANDS.
CAUTION: MAKE SURE YOU INSTALL THE BLADE LOCK IF YOU MUST GO AWAY FROM
_______ THE ENGINE. IF THERE IS ENGINE WINDMILLING WHEN THE FAN BLADES ARE IN THE FORWARD POSITION, THE BLADES CAN BECOME DAMAGED.
CAUTION: DO NOT USE THE PHASE III FAN BLADES WITHOUT THE APPLICABLE EEC
_______ PROGRAMING PLUG (EPP) AND EEC SOFTWARE, PW SCN94/AG. IF YOU DO NOT USE THE CORRECT EPP AND EEC SOFTWARE, DAMAGE CAN OCCUR TO THE ENGINE.
CAUTION: DO NOT MIX THE PHASE III FAN BLADES WITH OTHER FAN BLADES.
_______ THIS CAN CAUSE DAMAGE TO THE ENGINE.
(2) Use the correct fan blade or blades for the installation.
NOTE: To follow service bulletin PW4ENG 72-132, fan blades (OTHER
____
THAN PHASE III) that have different part numbers are
interchangeable. But, matched moment sets with the same
parts numbers must be kept together. It is better to keep
the mixture of different part numbers at a minimum. It is
best if all of the fan blades, that you install, have the
same part numbers.
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(3) Refer to figure 401, sheet 2, for the location of the moment weight marks.
NOTE: You can replace each damaged blade with a blade that has the
____ same moment weight or you can replace the blades with matched moment sets. If you use a matched moment set, the rotor must be assembled with matched moment sets.
When you replace a matched moment set of fan blades, install the fan blades 180 degrees apart. Two matched moment blades must have moment weights that are not more than 1.0 ounce-inch (720 gram-millimeters) apart.
When you replace one blade in a full rotor set, the moment of the replacement blade must not be more than 1.0 ounce-inch (720 gram-millimeter) from the blade that is 180 degrees opposite.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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WARNING:_______DO NOT PERMIT THE LUBRICANT TO TOUCH YOUR SKIN. IF IT DOES, WASH YOUR SKIN IMMEDIATELY WITH SOAP AND WATER. THE LUBRICANT CAN CAUSE INJURY TO YOUR SKIN
(4)
Use one of the methods that follow to lubricate the mid-span shrouds of the blades.
(a)
With a brush, apply the lubricant to the contact faces of the mid-span shrouds of the blades.
(b)
With a brush, apply the antigalling compound to the mating
surface of the midspan shroud of the fan blades.
NOTE: It is not necessary to cure the antigalling compound.
____
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(5)
Do the steps that follow to install one blade.
(a)
Put the empty blade slot at the 12 o'clock position.
(b)
Align the cutout with the empty blade slot.
(c)
Make sure that all of the blades are moved forward until they are stopped by the support fixture.
(d)
Install the replacement blade (2) (Fig. 401, sheet 2) through the cutout.
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(6)
If you will replace a matched moment set of blades, do the steps that follow.
(a)
Put the opposite empty blade slot at the 12 o'clock position.
(b)
Align the cutout with the empty blade slot.
(c)
Install the fan blade (2) (Fig. 401, sheet 2) through the
cutout.
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CAUTION:_______BE CAREFUL WITH THE FAN BLADE WHEN YOU INSTALL IT. YOU CAN EASILY CAUSE DAMAGE TO THE SEAL THAT IS BONDED TO THE BOTTOM OF THE FAN BLADE PLATFORM.
(7)
Do the steps that follow to keep the blade shroud and root free to move during the blade installation:
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本文链接地址：747-400 AMM 飞机维护手册 发动机 ENGINE 1(146)
