C. Strip seal (7) from outer reveal (6) and inboard frame (8). This step is only necessary if the seals are torn or damaged. To strip seal, scrape carefully using a wooden or plastic scraper, and clean up with aliphatic naphtha.
D. Remove outer pane spring retainers (12) by removing the two attaching screws (10) on each spring retainer.
E. Remove spring assembly (13), outer pane (l) and outer pane seal (9) from window outboard frame (11).
CAUTION: DO NOT COMPRESS SPRING TO LESS THAN 0.18 INCH WHEN REMOVING SPRING RETAINERS AS PERMANENT SET MAY OCCUR WHICH WILL PREVENT OBTAINING A SATSFACTORY WEATHER SEAL ON INSTALLATION OF THE WINDOW.
IF PANE IS TO BE REINSTALLED, A PROTECTIVE COVERING OF CELLULOSE SHEETING OR EQUIVALENT SHOULD BE APPLIED TO SURFACES TO PREVENT DAMAGE DURING HANDLING.
4. Prepare Emergency Exit Hatch Window for Installation
A. Clean faying surfaces of new seals (4, 7, and 9, figure 401), and outer reveal (6) and window frames (8 and 11), if seals are being replaced, with aliphatic naphtha applied with a clean, oil-free, absorbent material.
WARNING: ALIPHATIC NAPHTHA IS FLAMMABLE.
B. Wipe off solvent before it has evaporated with a clean, oil and lint-free, absorbent material such as Finetex, new cheesecloth or equivalent.
C. Repeat applications of clean solvent as necessary.
D. Mix EC 1128, Minnesota Mining and Manufacturing Company, thoroughly before using.
E. Brush adhesive onto both faying surfaces of reveal seals (6 and 8).
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F. Allow an open drying period 5 to 20 minutes for adhesive to become tacky, but not to transfer when touched lightly.
NOTE: Adhesive may be reactivated by wiping with aliphatic naphtha, TT-N-95.
G. Press seal (7) and reveal (6) firmly together, taking care to avoid trapping air pockets.
NOTE: 35% of adhesive ultimate strength is obtained immediately, using the maximum open drying period. EC 1128 shall not be heat-cured.
H. Clean up as necessary with aliphatic naphtha, TT-N-95.
5. Install Emergency Exit Hatch Window
A. Install outer pane (1, figure 401) with outer pane seal (9) and spring assembly (13) on window outboard frame (11). Install outer pane spring retainers (12) by installing the two attaching screws (10) on each spring retainer.
CAUTION: DO NOT COMPRESS SPRING TO LESS THAN 0.18 INCH WHEN INSTALLING SPRING RETAINERS AS PERMANENT SET MAY OCCUR WHICH WILL PREVENT OBTAINING A SATISFACTORY WEATHER SEAL.
B. Remove protective cover from inner surface of outer pane (1).
C. Clean , and apply antistatic agent to, inner surface of outer pane (l). Refer to Servicing, Passenger Windows.
D. Remove protective cover from outer surface of middle pane (5).
E. Clean and apply antistatic agent to outer surface of middle pane (5) Refer to Servicing, Passenger Windows.
F. Install outer reveal (6) with seal (4) and middle pane (5) on window inboard frame (8)
CAUTION: USE CARE IN HANDLING PLASTIC REVEAL. SURFACES VISIBLE TO CABIN INTERIOR MUST BE FREE OF MARKS, SCRATCHES, AND DENTS.
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Emergency Exit Hatch Window Installation 500
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G. Position window retainer (3) and seal (4) to hold middle pane (5) in place and install retainer screws (2).
H. Remove protective cover from inner surface of middle pane (5).
I. Clean, and apply antistatic agent to, inner surface of middle pane (5). See Servicing,
Passenger Windows.
6. Restore Airplane to Normal Configuration
A. Install emergency exit hatch trim panel. Refer to Emergency Exit Hatch Lining, Chapter 52.
B. Remove protective cover from outer surface of outer pane (1).
C. Clean outer surface of outer pane with lukewarm water and castile soap. Use a soft, clean cloth to transfer the soap solution to the pane surface. Go over the surface with the bare hand only, so that any dirt can be quickly detected and removed before it scratches the surface.
D. Wipe dry with a clean, damp chamois.
CAUTION: DO NOT RUB SURFACE WITH A DRY CLOTH. IT CAUSES SCRATCHES AND BUILDS UP AN ELECTROSTATIC CHARGE WHICH ATTRACTS DUST PARTICLES.
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