321U2630 NACELLE STRUT DRAIN INSTL. - OUTBD
321U4011 SEAL APPLICATION - OUTBD STRUT SYSTEMS
322U2330 PNEUMATIC DUCT INSTL -OUTBD NACELLE STRUT
322U4100 PLUMBING INSTALLATION HYDRAULIC AND FUEL OUTBD
330T8793 PI TUBING INST. SECTION 33, UPPER LEFT SIDE ENGINE
330T8794 PI TUBING INST. SECTION 33, UPPER RIGHT SIDE ENGINE
330T8795 PI TUBING INST. SECTION 33, LOWER LEFT SIDE ENGINE
330T8796 PI TUBING INST. SECTION 33, LOWER RIGHT SIDE ENGINE
330T8893 WIRE BUNDLE INSTALLATION SECTION 33, UPPER LEFT SIDE ENGINE
330T8894 SECTION 33, UPPER RIGHT WIRE BUNDLE INSTALLATION SIDE ENGINE
330T8895 SECTION 33, LOWER LEFT WIRE BUNDLE INSTALLATION SIDE ENGINE
330T8896 SECTION 33, LOWER RIGHT WIRE BUNDLE INSTALLATION SIDE ENGINE
332T4390 DUCT INSTL - NOSE COWL THERMAL ANTI-ICING ENG
334T4000 PW4000 ENGINE INLET INSTALLATION -
Seal Index and Requirements Nacelle Struts
Figure 8 (Sheet 3)
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51-31-00
ALL ú ú 02 Page 22 ú Apr 10/89
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEALS AND SEALING - MAINTENANCE PRACTICES
_________________________________________
1. General
_______
A. This procedure contains these tasks:
(1)
Prepare the surface for the sealing procedure.
(2)
Apply a non-removable faying (mated) surface seal.
(3)
Apply a removable faying mated surface seal and form to place gaskets.
(4)
Apply an injection seal.
(5)
Apply a hole and slot seal.
(6)
Apply a fillet seal.
(7)
Apply a fastener seal.
(8)
Apply aerodynamic smoother.
(9)
Apply an electrical fitting seal.
(10)
Apply a fuel seal.
(11)
Protection of sealing materials.
(12)
Accelerated curing.
B. These tasks give instructions to prevent the leakage of fluids and gases.
C. Listen for the air leakage during a fuselage pressure check to help you find the location of the air leakage.
D. Look for the fluids or stains that are on the dry side of the structural members to help you find the location of the fluid leakage.
E. There are drain (limber) holes in the fuselage stringers and fuselage frames.
F. The drain holes permit fluids and condensation to drain downward to the external (overboard) drains that are on the bottom of the airplane.
G. Make sure you do not cause blockage to these drain holes when you apply the sealant.
H. For information on internal and external drain holes and paths, refer to AMM 51-41-00.
I. For information on alternative sealants, refer to Figure 208.
J. For information on types of sealant, refer to AMM 20-30-02/201.
TASK 51-31-01-302-102
2. Prepare for Sealing
___________________
A. References
(1) AMM 20-30-01/201, Adhesives, Cements, and Sealants
B. Equipment
(1) Sealant Removal Tool - made from wood or
plastic 3/16-inch thick, 8-inches long in 1/4,
1/2 and 3/4-inch widths.
C. Consumable Materials
(1)
B00184 Cleaning Solvent - BMS 11-7
(2)
G00027 Cheesecloth
D. Procedure
S 302-103
(1) If structural repair is necessary on the airplane structure, refer to the Structural Repair Manual.
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