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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(j) Torque the six screws (4) to 22 pound-inches (2.486 newton-meters) plus the torque necessary to turn them through the locking feature of the nuts.
NOTE: The maximum torque is 40 pound-inches (4.519
____
newton-meters).
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(2) Apply the sealant to Areas AK as follows (Fig. 402 Sheet 7):
~................................................ | TABLE 405 | | SEALANT LIMITS FOR FIGURE 402 SHEET 7 | .................................................. | | APPLICATION OF SEALANT | .................................................. | 1 | Apply the sealant to make a | | | surface continuous with: To | | | 0.010 Inch (0.254 mm) above the | | | surface. | .................................................. | 2 | Apply the sealant to make a surface| | | continuous with, to 0.010 Inch | | | (0.254 mm) below, all around the | | | access cover, two places. | 2...........…....................................1
(a)
Clean the areas the sealant will touch.
NOTE:____Use a Cheesecloth that is wet with Alcohol. Before you apply the primer, make sure there is no alcohol on the surfaces to be primed.
(b)
Apply the Primer to all cleaned surfaces.
1) You must apply the primer in less than two hours after the area is cleaned.
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2) The primer must dry in air at ambient temperature for a minimum of hours. a) The air must have a minimum relative humidity of 25
percent.
(c) Apply the Sealant.
NOTE: You must apply the sealant from 2 - 24 hours after you
____
have applied the primer.
1) Use a hot air gun at 175° - 225°F (79° - 107°C) for 5 - 7 minutes to dry the sealant.
2) After you complete the hot air gun procedure, cure the sealant in air with a minimum relative humidity of 25 percent.
NOTE: You must cure the sealant for a minimum of eight
____ hours before you touch the parts.
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(3)
Apply the Sealant to Area AL as follows (Fig. 402 Sheet 7):
(a)
Clean the areas the sealant will touch with alcohol on a Cheesecloth.
NOTE: Before you apply the sealant, make sure there is no
____
alcohol on the surfaces.
(b) Apply the sealant.
1) Cure the sealant in ambient air that has a minimum relative humidity of 25 percent, for a minimum of two hours.
NOTE: Make sure the parts are dry (not tacky) before you
____
touch them.
2) Make sure you cure the sealant for eight hours before you operate the engine.
H. Put the Airplane Back to Its Usual Condition.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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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: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
(1)
Close the thrust reversers (AMM 78-31-00/201).
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(2)
Close the core cowl panels (AMM 71-11-06/201).
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(3)
Close the fan cowl panels (AMM 71-11-04/201).
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