D. Fit seal at remaining three door corners and four gate hinge ends in a similar temporary manner.
E. Fit seal temporarily along forward (hinge) edge of door, locating and punching holes and installing screws and washers in sequence shown in view 1.
NOTE: Seal should be under some tension between points 3 and 4, and under slight compression between points 1 and 4 and between points 2 and 3, in order to maintain angle of 90 degrees between door edge and outboard face of seal.
F. Locate and punch remaining holes in seal attachment flange all around door and along gate hinges.
NOTE: On upper and lower gates no locating angle is fitted and holes must be punched to locate seal parallel to gate edge and in accordance with dimensions on Sections A -A and B-B, figure 401.
G. Remove all screws, discard washers and install retainer angles, using same screws as were used temporarily.
H. Install remaining screws in seal retainer angles around edges of door and gates, and install bolts in retainer angles along channel section. Tighten screws and bolts until compression of seal attachment flange just becomes visible.
NOTE: The rain exclusion spring should be installed under the heads of the channel section retaining strip attachment bolts at both ends of both gate hinges. (See detail A.)
I. Insert 3/8 inch diameter silicone sponge rubber filler into open ends of seal bulb section at each end of lower gate. When installed, both fillers should lie within straight length of seal along lower gate. (See section B-B and detail B.)
J. Connect control and stop rods at upper and lower gates if a unit seal is being installed.
K. Check seal installation.
(1)
Tape 0.06 inch shim to stop fittings adjacent to latches and close door until contact is made with shims.
(2)
Check that when a source of light is moved along forward and aft edges of door outside airplane, no light is visible through these edges from inside airplane.
(3)
Shim seal locally if necessary to obtain correct installation.
(a)
Open door.
(b)
Remove retainer angle attachment screws at each end of length of seal to be shimmed.
NOTE: The length of individual shims is generally limited to the distance between alternate screws. Where the seal bends to approach the hinge cutouts, however, the shims should be limited in length to the distance between adjacent screws. No shims should be installed in those portions of the seal which butt against the hinge flap gates (between points 3 and 4, view 1, figure 401), as excessive pinching and damage of the seal may result.
(c)
Cut shim to length required.
NOTE: Shims should be cut from a wedge-section rubber extrusion (BAC1521-585), or may be made by cutting down part of an old or spare seal to obtain area A, shown shaded on Section A-A.
(d)
Trap ends of shim under shim retaining clip (figure 402) and install retainer angle attachment screws.
(e)
Check seal installation as described in step (2).
(4)
Open door, remove shims from stop fittings and close door completely.
(5)
Check that when source of light is moved around entire edge of door, outside airplane, no light is visible through any part of seal from inside airplane. Shim seal again if necessary until installation is satisfactory.
CAUTION: DO NOT ATTEMPT TO CLOSE DOOR COMPLETELY.
500
52-09-131 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/67
500
Nov 15/67 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-09-131 Page 405
Door Seal Shim Installation 500
52-09-131Page 406 Figure 402 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Nov 15/67
DIAPHRAGM - MECHANICAL SEALS - REMOVAL/INSTALLATION
1. General
A. The diaphragm - mechanical type seal is a one-piece silicone rubber molded door seal. The seal consists of a mechanical type seal at the door edge and a diaphragm type seal at the upper and lower gate hinges.
B. For seal repairs refer to 52-09-100 AR.
2. Equipment and Materials
A. Liquid soap lubricant
(1)
Kelite Spraywhite
(2)
Turco 1526
B. Solvent - Final Cleaning of Metal Prior to Non-structural Bonding (Series 88) (Ref AMM/SOPM 20-30-88)
C. Silicone Sealant – Q3-0121, Dow Corning Corporation
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