Technical data
13773-001
56-20
Page 1
CABIN
1. DESCRIPTION AND OPERATION
All replacements are accomplished by removing the interior panels around the window, removing the seal-
ant around the window, and then removing the window itself. In general the reverse process is used to
install a replacement window. This method is literally seamless, and the fuselage will show no marks or
evidence of maintenance. The passenger and aft windows are made from acrylic plastic.
2. MAINTENANCE PRACTICES
A. Passenger and Aft Windows
(1) Removal - Passenger and aft Windows (See Figure 56-201)
(a) Acquire necessary tools, equipment, and supplies.
(b) Remove the interior trim panels from around the window. (Refer to 25-10)
(c) Cover the interior and instrument panel with a drop cloth to prevent foreign material from
contaminating the interior and instruments.
(d) Using several pieces of duct tape, make handles on the exterior of the window.
CAUTION: Exercise care to prevent the removal of laminate from the fuselage when
cutting and removing the sealant from between the fuselage and window. If
laminate is damaged, it must be repaired prior to installing the window.
Note: If window is being replaced, it will be easier to use a die grinder and a cut-
off disk to cut out the inner portion of the window to gain access to the bond-
ing flange. The window should be cut as close as possible to the fuselage.
(e) Cut sealant loose from between fuselage and window using a small pocket knife. While
pushing in on the window, follow the edge of the fuselage with the tip of the blade, then
back cut in towards the fuselage to clean out the sealant. (See Figure 56-201)
(f) Using a phenolic or hardwood utility knife, isopropyl alcohol and aluminum oxide sandpa-
per (80-grit), remove all remaining sealant from the fuselage bonding flange.
Description P/N or Spec. Supplier Purpose
Die Grinder with 1-inch cut-
off disk
- Any Source Cut window
Masking Tape 2-inch Any Source Prevent damage to
the window
Drop Cloth - Any Source Prevent contamina-
tion
Isopropyl Alcohol TT-I-735
Grade A or B
Any Source General cleaning
Aluminum Oxide Sandpa-
per
80-grit Any Source Sealant removal
Phenolic or Hardwood Util-
ity Knife
1-inch Any Source Sealant removal
30 Nov 2000