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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 932-005-N00
(2) Materials used to make marks on engine parts.
(a) The materials you can use in the cold and hot engine areas are given in the Consumable Materials.
NOTE: Do not use the Phano No. 71 Red Crayon in the gas
____ path areas. The marks made with this material will be gone quickly.
(b)
The materials you can use in the cold engine areas are given in the Consumable Materials.
(c)
The materials you can use in the hot engine areas are given in the Consumable Materials. 1) Use layout dye to make a mark on the parts in the gas path
areas. These areas include: turbine blades, disks, turbine vanes, and combustion chamber liners.
NOTE: PMC 4057-1 Metal Marking Ink No. 977-9 (black)
____ and PMC 4057-2 (white) can only be used on the turbine blades.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
STANDARD TORQUE VALUES - MAINTENANCE PRACTICES
______________________________________________
1. General
_______
A. Use the approved torque limits, when the procedure shows no torque
limits.
B. Torque limits on the J-threads are the same as the torque limits on the
usual threads.
C. The torque limits in this section have these properties:
(1)
They give the torque limits in pound-inches and Newton meters at room temperature.
(2)
They give the angles of a turn in degrees.
(3)
They give the extension values in inches and millimeters.
D. Unless the procedure gives a lubricant, the torque limits apply to the
threads that do not have a lubricant.
E. Let the temperatures of the part and of the adjacent areas become the
same, before you tighten it.
F. Be very careful, when you assemble the flanges and the engine sections.
(1)
Parts that connect with a click-fit must touch correctly, before you tighten them.
(2)
You must usually install the bolts at regular spaces.
(3)
You must then tighten slowly and equally, until the parts engage.
(4)
Two persons together must tighten the flange bolts that have a separation of 180 degrees.
(5)
After the engine sections touch correctly, tighten all of the bolts to 75 percent of the specified torque limit.
(a)
Tighten equally the bolts at spaces of 180 degrees, 90 degrees, and 45 degrees.
(b)
This will prevent the high loads on the bolts and flange.
(c)
Then use the same procedure, and tighten the bolts to the specified torque limits.
G. You must apply torque slowly and equally for best possible precision.
(1) Possibly you will not use the specified torque limits because of the material or the configuration of the part.
(a) You must make the decision if this occurs.
TASK 70-23-00-912-024-N00
2. Torque Indication Devices
_________________________
A. You must make a check of the torque indication devices each day.
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(1)
You must calibrate the devices with weights and with a lever arm to make sure that the devices are accurate.
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(2)
You must not use a torque wrench to make a check of a different torque wrench.
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(3)
Some torque wrenches are sensitive to your procedure, when you hold them while you tighten a part.
(a) You must follow the manufacturer's instructions when you use the torque wrenches.
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