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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
BOND ALL AROUND

L-A6590
L-A6678

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(3)  
B00143 Solvent - Trichlotriflouroethane

 (4)  
B00148 Solvent - Methyl Ethyl Ketone

 (5)  
C00057 Primer - Zinc Chromate

 (6)  
G00033 Cheesecloth - Unsized

 (7)  
G00983 Paper - Kraft, Medium or Light Duty

 B.
References

 (1)  
AMM 71-11-04/201, Fan Cowl Panels

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 C.
Access

 (1)  
Location Zone
 412 Engine 1 - LPC Intermediate Case
 422 Engine 2 - LPC Intermediate Case
 432 Engine 3 - LPC Intermediate Case
 442 Engine 4 - LPC Intermediate Case

 D.
Procedure

 S 144-003-N00
 (1)  
If you install the used fairing, mechanically remove all damaged or loose sealant from the bonded surfaces of the fairing.

 S 324-004-N00

 (2)  
If you install a new fairing, put rivet holes in the new fairing (Fig. 401 or Fig. 402).

 (a)  
Put the new fairing on the strut so that the edge gap is approximately equal on all sides. 1) The difference between each edge gap dimension must be less

 than 0.030 inch (0.762 mm). 2) Make the gap at the outer diameter edge smaller if the new fairing does not have an overlap there.

 (b)  
Use applicable clamps to hold the new fairing in the correct position.

 (c)  
Make a mark on the new fairing where each used rivet hole on the strut is.

 (d)  
Remove the new fairing from the strut.

 CAUTION: DO NOT USE FLUIDS OR LUBRICANTS WHEN YOU MACHINE THE RIVET
_______ HOLES. BE CAREFUL TO PROTECT THE MACHINED SURFACES FROM CONTAMINATION. IF YOU DO NOT PROTECT THE MACHINED SURFACES YOU CAN CAUSE DAMAGE TO THE LAMINATION.
 (e)  
Machine the new rivet holes vertically through the new fairing.

 (f)  
Remove all contamination from the new fairing.

 (3)  
Install the fairing.

 S 424-007-N00
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
WARNING:_______ DO NOT GET THE SOLVENT IN YOUR MOUTH OR EYES,OR ON YOUR
 SKIN.  DO NOT BREATHE THE FUMES FROM THE SOLVENT.  PUT ON
 PROTECTIVE SPLASH GOGGLES AND GLOVES WHEN YOU USE THE
 SOLVENT.  KEEP THE SOLVENT AWAY FROM SPARKS, FLAMES, AND
 HEAT.  THE SOLVENT IS POISIONOUS AND FLAMMABLE AND CAN

 CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (a)  With MEK or Trichlorotriflouroethane clean the parts of the strut, fairing, and intermediate case that the sealant will touch. 1) Make wet a piece of clean cheesecloth with solvent. 2) Wipe the area of repair with the cheesecloth. 3) Dry the surfaces fully in air that is at ambient
 temperature.
 4)  If you do not apply the sealant immediately, put the paper over the cleaned parts. a) You must apply the sealant in two (2) hours.
 (b)  
Apply the red or gray sealant to the mating surfaces of the strut.

 (c)  
With clamps attach the fairing to the strut.
　
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