501 Cargo Compartment Lining and Insulation Location
Aug 15/69 Figure 1 25-52-100
Page 1
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
D. The aft bulkhead of the aft compartment is lined with aluminum alloy sheet panels, which are held to the structure by quick-release fasteners or screws. On some airplanes, the aft bulkhead of the forward compartment is lined with fiberglass skins and foamed plastic cores. On other airplanes, the aft bulkhead is lined with aluminum alloy sheet panels. A plastic or plastic-backed sheet metal grille covers the blowout panel opening in the forward compartment aft bulkhead.
3. Insulation
A. Insulation blankets are outboard of the sidewall lining and below the compartment deck. Most blankets are fastened to structural members by plastic studs and clips. Larger sidewall blankets are further held in place by nylon lacing, which runs across the inboard surfaces of the blankets and between adjacent body frames. Some parts of certain blankets are also fastened by velcro tape. The blankets above the cargo compartment doorways, and a few of the smaller blankets, are fastened only by velcro tape.
B. A typical blanket has a layer of fiberglass wool, an inboard cover, and an outboard cover. The two covers are stitched or cemented together at the blanket edges, along which there may be a trim strip and fastener tabs. The blankets vary widely in size and shape, each being tailored to fit its surroundings. Blankets that cover body frame intercostal webs have holes that match the holes in the intercostal webs. The holes allow air to circulate between the inboard side of the blanket and the sidewall lining.
C. Foamed plastic panels are on the bottom of the structural members just below the passenger cabin floor and along both sidewalls. The panels are cemented to the structural members. On some airplanes, foamed plastic panels also line the inside surfaces of the inner and outer skins of the cargo compartment doors. On other airplanes, fiberglass wool insulation blankets line the inner surface of the cargo compartment doors. The insulation blankets or panels are fastened to the skin by plastic studs or by cementing.
5C8
25-52-100 Page 2 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/85
CARGO COMPARTMENT LINING AND INSULATION - INSPECTION/CHECK
1. General
A. This procedure gives the instruction to examine the fiberglass liners on the vertical and sloping sidewalls, ceiling, and bulkheads in the cargo compartment. This procedure has one task:
(1) The inspection and check of the Compartment Lining.
B. The function of the lining is to contain the fire extinguishing capabilities in the cargo compartment. It is important that all the fasteners, seams, and punctures to be correctly sealed.
2. Compartment Lining Inspection/Check
A. References
(1)
25-52-100/801, Cargo Compartment Lining
(2)
25-52-111/401, Cargo Compartment Ceiling Lining
(3)
25-52-121/401, Cargo Compartment Sidewall Lining
(4)
25-52-131/401, Cargo Compartment Bulkhead Lining
B. Procedure
(1)
Do this task: "Permanent Repair" (Ref 25-52-100/801) for the damaged liners that are not more than these damaged limits:
(a)
A cut up to 12-inches long
(b)
An "L" shaped tear up to 9-inches long for each side
(e)
A hole up to 1.5 inches in diameter
(d)
One damaged fastener
(e)
A damaged zipper
(f)
Loose or no tape on and around the seams and fasteners
(2)
Replace the applicable fiberglass liner that is more than the above damaged limits (Ref 25-52-111/401, 25-52-121/401, or 25-52-131/401).
500
Feb 20/92 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 25-52-100 Page 601
CARGO COMPARTMENT LINING - APPROVED REPAIRS
1. General
A. The cargo compartment lining must be repaired to keep the compartment class D smother type category.
B. The repairs that follow are for the fiberglass liners on the vertical and sloping sidewalls, ceiling, and bulkheads in the cargo compartment.
C. This procedure contains four tasks for the repairs of the cargo compartment liners.
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