52-09-01
ALL ú ú 03 Page 401 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B
WATER DRAIN DAM
MAIN ENTRY DOOR
A-A
TWO SEGMENTS METAL ROD COMES IN LOWER GATE B-B NOTE:____ GATE SIMILAR. LOWER GATE, UPPER SEALS SHOWN ON
Diaphragm Seal Installation Figure 401
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52-09-01
ALL ú ú 01 Page 402 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 014-006
(4)
Pull the rods from the diaphragm seal retainers.
S 024-007
(5)
Pull the seal from the door.
TASK 52-09-01-404-008
3. Install the Diaphragm Seal (Fig. 401)__________________________
A. Standard Tools and Equipment
(1)
Leather Punch, 0.09 Inch Diameter Hole
B.
Consumable Materials
(1)
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261
(2)
A00247 Sealant - BMS 5-95, Class B
(3)
A00303 Adhesive, RTV 102
(4)
B00048 Detergent - Spraywhite E
C.
References
(1)
52-11-02-4, Main Entry Door Lining and Insulation
(2)
IPC 52-09-01 Fig. 1
D.
Access
(1)
Location Zones
831L No. 1 Main Entry Door (Left)
835L No. 5 Main Entry Door (Left)
E.
Procedure
S 114-020
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON YOUR
_______ SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. SOLVENTS MAY BE FLAMMABLE OR HARMFUL TO THE ENVIRONMENT. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(1) Clean the seating surfaces of the seal to fully remove grease, oil, dirt, or adhesive with the solvent and a cloth. Wipe off the MEK , isopropyl alcohol, or ethyl alcohol before it dries with a clean cloth.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
(2) S 224-012Make sure the clearance of the diaphragm seal opening is 0.132 +0.000/-0.010 inch.
(3) S 424-013Push the edge of the diaphragm seal into the diaphragm seal retainer.
(4) S 644-014Apply the detergent to lubricate the rods that will install in the diaphragm seal retainer.
(5) S 414-015Install the nylon rod or metal rods (two at each location) into the diaphragm seal retainer. Do these steps: (a) If the nylon rod is installed, push the nylon rod into the center of the seal retainer and make sure it holds the seal in the socket of the seal retainer. (b) If the metal rods are installed, push the rods into the end of the seal retainer. Make sure the rods are aligned with the ends of the seal retainer.
NOTE:____ The rods are permitted to be recessed in the retainer a maximum of 0.2 inch. A maximum clearance of 0.6 inch is permitted between the ends of the rods at the center of the door.
(6) S 424-021Do the steps again to install the nylon or metal rods in the other diaphragm seal retainer.
(7) S 344-017Apply the sealant to the diaphragm seal as shown (View B-B, Fig. 401). (a) Apply the pressure fillet and injection seals to the diaphragm seal.
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52-09-01
ALL ú ú 03 Page 404 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b)
Apply a layer of the silicone sealant on the ends of each diaphragm seal, rod, and seal retainer. Make an overlap of the sealant on the diaphragm seal and make the surface smooth.
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