(3)  
Seal Washers. Silicone rubber seal washers are installed over the inboard end of the spacers and under the nut washer at the fastener locations on the window shown on Fig.

401. The silicone rubber seal washers function in a similar manner to the 0-rings described in par. 1.C.(2).
500 
May 15/77  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  56-11-11 Page 401 

Window No. 1 Installation  507 
56-11-11 Page 402  Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Jun 20/85 

H26816 H26821 H26905
500  Window No. 1 Installation 
May 15/77  Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  56-11-11 Page 403 

Window No. 1 Installation  500 
56-11-11 Page 404  Figure 401 (Sheet 3) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Aug 15/78 

500 Window No. 1 Installation Jun 20/85 Figure 401 (Sheet 4) 56-11-11 Page 404A/404B BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

D.  Replacement windows are supplied with necessary parts for installation and with both sides of pane covered with a protective coating.
2.  Equipment and Materials
A.  Protective covering for windows not already protected - Polyester Transparent Tape, No. 850 (Ref 20-30-51)
B.  Masking Tape - No. 221 (Ref 20-30-51)
C.  Window Frame Fairing Compound - EC-3587-1/4 or EC-3587-1 (Ref 20-30-11)
D.  Aliphatic Naphtha - TT-N-95A, Type II (Ref 20-30-31)
NOTE:  Freon-TF, or equivalent, may be used in lieu of aliphatic naphtha, TT-N-95A, Type II, for general cleaning of windows.
E.  Corrosion Preventive Compound - MIL-C-11796, Class 3 (Ref 20-30-21)
F.  Nylon Cord - MIL-C-5040, Type 1A, or Nylon Thread - V-T-295A, Type I, Class 2, No. 9 (Ref 20-30-51)
G.  Aerodynamic Smoother - PR 1425, Alternate BMS 5-26 or BMS 5-95, Class B (Ref 20-30-11)
H.  (Alternative) Sealant PR 1826, Class B-1/2 and Class B-1/4 (with primer) (dark grey)
I.  (Alternative) Sealant PR 1828, Class B-1/2 and Class B-1/4 (white)
J.  Spatula or flow gun
K.  Cheesecloth - lint- and oil-free
L.  Nonmetallic block to support bumper strip
M.  Aluminum Tubular Wire Mesh - Knitted Mesh Tecknit 20-21112, Technical Wire Products, Inc. 427 Olive St., Santa Barbara, CA 93101
NOTE:  Tubular wire mesh is required for PPG and Sierracin windows only. It is not required for Triplex windows.
N.  Compound, Electrical Insulating Coating - BMS 5-37 (Ref 20-30-11)
3.  Prepare Window No. 1 for Removal
A.  Check that power is OFF in window heating circuit.
WARNING:  OUTPUT VOLTAGE OF AUTOTRANSFORMER RANGES FROM 250 TO 350 VOLTS. BE CAREFUL WHEN WORKING ON CONTROL CABIN WINDOWS TO AVOID ELECTRICAL SHOCK AND INJURY TO PERSONNEL.
B.  Remove trim panels and crash padding where necessary (Ref 25-16-41 R/I).
C.  Remove seat adjustment sight guide (Ref 25-11-31 R/I).
D.  Remove lightshield (glareshield) (Ref 25-11-21).
E.  Remove lightshield (glareshield) brackets or clips, as required.
F.  Remove sunshade support rod above window, drain tube clamps at window post on airplane centerline, and drain pan.
NOTE:  Drain tube must be pushed aside to allow window removal.
580 
Oct 20/92  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  56-11-11 Page 405 

G.  Disconnect power leads at window bus bar terminals.
H.  Strip aerodynamic smoother from gap around outside edge of window (Fig. 402). Uncover free end of nylon cord and pull steadily. On windows without Z-channel, use a nonmetallic block to support edge of adjacent bumper strip until cord and smoother are removed.
NOTE:  Free end of nylon cord is located in upper aft corner of window.
4.  Remove Window No. 1
A.  Remove window fasteners.
(1)  
Remove self-locking nuts (7, Details A and D, Fig. 401) and hexnuts (19 and 18, detail C).

(2)  
Remove wire clamp (6, detail A), aluminum flat washer (5) and O-ring (4).

(3)  
Remove aluminum washer (17, details C and D) and silicone rubber seal washer (16).

(4)  
Remove retaining bolt (3) from window assembly (1) and window frame (8).

NOTE:  At aft edge of window, a row of bolts attach a retaining angle to frame. Access to these bolts is obtained by opening adjacent sliding window (detail B).

H30514
Removal of Window Gap Filler  580 
　
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