(2)
Replace seal area or section with a similar section of a surplus seal cut to the exact length.
(3)
Locate joint splice in straight section of seal.
(4)
Make mitered cut on abutting seal surface and fill with a Type II or Type III adhesive (par. 1.C.(2) or (3)).
(5)
Apply adhesive to complete the seal.
NOTE: For an emergency seal repair, Method A (par. 1.B.(1)) can be used with Type III adhesive (par. 1.C.(3)).
11. Check Door Drain Holes
A. Check that drain holes in doors are not blocked.
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May 01/01 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-09-100 Page 813
DIAPHRAGM SEALS - REMOVAL/INSTALLATION
1. General
A. Diaphragm door seals are used to pressure seal the gate hinges on the passenger/crew entry doors and the galley service doors. There are two methods used for attaching the diaphragm seals to the doors (Fig. 401.)
(1)
The seal may be retained by nylon rods in the socket of an extruded seal retainer attached to the door structure.
(2)
The seal may be attached by a seal retainer that is secured by screws or bolts through the seal to the door structure.
2. Equipment and Materials
A. Liquid soap lubricant
(1)
Kelite Spraywhite
(2)
Turco 1526
B. Pressure and Moisture Sealant, BMS 5-19, Class B
C. Leather punch 0.09 inch diameter hole
D. Solvent - Final Cleaning of Metal Prior to Non-structural Bonding (Series 88) (Ref AMM/SOPM 20-30-88)
E. Silicone Sealant - Q3-0121, Dow Corning Corporation
3. Remove Diaphragm Seal
A. Position door as necessary to facilitate seal removal.
B. Remove gate control rod attachment bolt (Section A-A) and rotate gate outboard.
NOTE: If difficulty is encountered while removing or installing seal, remove door lining for access.
C. Use solvent, Series 88 (Ref AMM/SOPM 20-30-88) if necessary to remove adhesive between seal and door structure.
D. On door with extruded seal retainers, pull nylon rods from retainers, freeing the seal from the door.
E. On doors with a seal retainer fixed by screws through the seal, remove screws and retainer angle and remove seal from the door.
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May 01/00 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-09-111 Page 401
Diaphragm Seal Installation 500
52-09-111 Figure 401 Feb 20/87
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
4. Install Diaphragm Seal
A. Clean seal seating surface thoroughly to remove grease, oil, dirt or adhesive with solvent, Series 88 (Ref AMM/SOPM 20-30-88) and a clean cloth.
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. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
B. On doors with extruded seal retainer, check that the gap of the socket entrance is 0.132 +0.000/-0.010 inch.
C. Position seal on door adjacent to the seal retainer.
D. Apply Dow Corning Q3-0121 seal over entire end of seal retainer, pin and diaphragm. Overlap well on to diaphragm. Fair sealant smooth.
E. On doors with extruded seal retainer insert two nylon rods, forming a butt fit of the radius end of the rods at the center of the door, trapping the seal material in the socket of the seal retainer.
NOTE: Liquid soap may be used as a lubricant during installation.
F. On doors with a seal retainer fixed by screws through the seal, temporarily install the seal along hinge, punching holes corresponding to the holes in the seal retainer.
(1)
Remove seal and apply sealant as a faying surface seal between seal and the door and gate in the retainer area. Refer to 51-31-0, Seals and Sealing.
(2)
Position seal on door and screw seal retainer in place by tightening screws until compression of seal flange just becomes visible.
G. Install gate control rod attachment bolt (Section A-A).
H. Install door lining, if removed. Refer to applicable section for door lining and insulation R/I.
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