2) Tighten the two shoulder screws (9) in the side panels. a) Tighten these screws (9) to 22 pound-inches (2.486
(2.486 newton-meters) plus the torque necessary to turn the screw through the self- locking feature.
NOTE: The maximum torque is 95 pound-inches (10.734
____
newton-meters).
3) Tighten the inner fairing screws (8), (15), and (4) that attach the fairings/access covers to the case. a) Tighten these screws (8), (15), (4), to 22 pound-inches
(2.486 newton-meters) plus the torque necessary to turn the screw through the self-locking feature.
NOTE: The maximum torque is 40 pound-inches (4.519
____
newton-meters).
4) Tighten the two shoulder screws (13) in the outer fairing (1). a) Tighten these screws (13) to 22 pound-inches (2.486
newton-meters) plus the torque necessary to turn the screw through the self-locking feature.
NOTE: The maximum torque is 95 pound-inches (10.734
____
newton-meters).
5) Tighten the remaining outer fairing screws (14) that attach the outer fairing (1) to the case. a) Tighten these screws (14) to 22 pound-inches (2.486
newton-meters) plus the torque necessary to turn the screw through the self- locking feature.
NOTE: The maximum torque is 40 pound-inches (4.519
____
newton-meters).
6) Examine the position of the cover plate (10) to make sure that the dimensions agree with Figure 402 Sheet 6.
NOTE: If they do not, loosen all the screws and do the
____
procedure again.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
7) Tighten the leading edge screws (7) that attach the leading edge to the side panels.
NOTE: Use Torx tip T-10.
____
a) Tighten these screws (7)to 22 pound-inches (2.486 newton-meters) plus the torque necessary to turn the screw through the self-locking feature.
NOTE: The maximum torque is 40 pound-inches (4.519
____
newton-meters).
8) Tighten the outer fairing screws (12) that attach the outer fairing to the inner fairings (3) . a) Tighten these screws (12) to 22 pound-inches (2.486
newton-meters) plus the torque necessary to turn the screw through the self-locking feature.
NOTE: The maximum torque is 40 newton-meters (4.519
____
newton-meters).
(e)
Apply the sealant to Area AK (See Table 404 and Figure 402 Sheet 7).
~................................................ | TABLE 404 | | 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, | | | 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
(f)
Clean the areas the sealant will touch, with Alcohol.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(g) Apply a layer of Primer to all cleaned surfaces.
NOTE: You must apply the primer in less than two hours after
____ the area to be primed was cleaned.
The primer layer must dry in air at ambient temperature a minimum of two hours.
The air must have a minimum relative humidity of 25 percent.
(h) Apply the Sealant. 1) You must apply the sealant from 2 - 24 hours after the primer was applied. 2) Use a hot air gun at 175° - 225°F (79.° - 107.°C) for 5 - 7 minutes to dry the sealant.
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