747-400 AMM 飞机维护手册 发动机 ENGINE 2(63)

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 (f)  Install the leading edge of the inner fairing (3) to have an overlap on the side panels.
 NOTE: Make sure the forward ends of the leading edge do
____ overlap the installed front liner segments correctly.
 1) Attach the leading edge to the case.
 2) Install the screws (15), lubricated with Engine Oil, in the
 bolt holes.
 3) Tighten the screws with your hand.
 4) Attach the leading edge to the side panels.
 5) Install the screws (7), lubricated with Engine Oil, in the
 bolt holes.
 6) Tighten the screws with your hand.
 (g)  
Attach the two access covers (6) with screws (4) and (5), lubricated with Engine Oil. 1) Tighten the screws with your hand.

 (h)  
Install the two shoulder screws (9), lubricated with Engine Oil, into the side panels. 1) Tighten the shoulder screws against the panels (3).

 (i)  
Tighten the countersunk screws (8) of the side panels.

 (j)  
Tighten the screws (7) and (8) of the leading edge.

 NOTE: Use Torx tip T-10 with screws (7).
____
 (k)  Tighten the screws (4) and (5) of the access covers (6) against the covers.
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 (2)  Do a check of the clearance between the trailing edge of the inner fairing leading edge and the leading edge of the side panels (Fig. 402).
 NOTE: The necessary clearance is 0.000 - 0.040 Inch
____ (0.00 - 1.02 mm).
 (a)  
Where the clearance is not correct, attach washers to the bolt holes at the trailing edge of the inner fairing leading edge as follows (See Table 401 for washer thicknesses):

 ~................................................ | TABLE 401 | | WASHER THICKNESSES | .................................................. | Class | Washer Thickness - Inch (mm) | .................................................. | 1 | 0.009 - 0.011 (0.229 - 0.279) | .................................................. | 2 | 0.019 - 0.021 (0.483 - 0.503) | .................................................. | 3 | 0.029 - 0.031 (0.737 - 0.787) | .................................................. | 4 | 0.039 - 0.041 (0.991 - 1.041) | .................................................. | 5 | 0.049 - 0.051 (1.224 - 1.295) | .................................................. | 6 | 0.099 - 0.101 (2.514 - 2.565) | 2...........…....................................1

 (b)  
Remove the screws from the trailing edge of the inner
 fairing (3) leading edge.

 (c)  
Clean the washers and the area around the bolt holes with a clean piece of Cheesecloth that is moist with Alcohol. 1) Dry the surfaces fully in air that is at ambient

 temperature.
 NOTE: There must be no alcohol on the parts when the
____
 sealant is applied.

 (d)  Put the washers in the correct position on the fairing (install the screws if it is necessary).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(e)  Bond the washers to the inner fairing (3) (leading edge) with a fillet of Sealant all around. 1) Cure the sealant in air that is at ambient temperature for
 two hours, minimum.
 NOTE: Do this until it is dry (not tacky), before you
____ touch it.
 It is permitted to have a very small quantity of the sealant between the washer and the fairing.
 (f)  
Attach the trailing edge of the inner fairing (3) (leading edge) with screws. 1) Lubricate the threads of the screws with with Engine Oil

 (Refer to Table 402 for screw lengths).

 (g)  
Tighten the screws against the inner fairing (3) (leading edge).

 ~............................................................................... | TABLE 402 | | WASHER THICKNESS AND SCREW LENGTH | ................................................................................. | Screw PN | Screw Length | Washer Thickness | Quanity of Screws | ....................|............................................................ | 593111 | 0.495 - 0.505 in. | 0.000 - 0.015 in. | 0 - 2 As Necessary| ................................................................................. | ST1382-09 | 0.542 - 0.562 in. | 0.016 - 0.070 in. | 0 - 2 As Necessary| ................................................................................. | ST1382-10 | 0.594 - 0.625 in. | 0.071 - 0.130 in. | 0 - 2 As Necessary| ................................................................................. | ST1382-11 | 0.656 - 0.687 in. | 0.131 - 0.210 in. | 0 - 2 As Necessary| 2...................…...................…...................…...................1
　
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