Inflight Depressurization Blowout Panels
Figure 601 (Sheet 1)
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A
747-400
MAINTENANCE MANUAL
VENT CAGE
A
CARPET AND PAD
A
FLOOR
SEAT TRACK PANEL
DEPRESSURIZATION BLOWOUT PANEL SEEC D
A
B
U-CLIP FOR THE
RETAINING
WIRE CAGECAGE BRACKET RETAINING U-CLIP
SPRING
CAGE
BRACKET
SCREW
FWD
S-HOOK
FLOOR
DEPRESSURIZATION PANEL BLOWOUT PANEL
EXAMPLE
A-A
TRUSS
VENT TYPE DADO PANEL
C D
Inflight Depressurization Blowout Panels
Figure 601 (Sheet 2)
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A 747-400 MAINTENANCE MANUAL
STA 580
CEILING VENT
MAIN DECK CEILING C-C
Inflight Depressurization Blowout Panels Figure 601 (Sheet 3)
K55364
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A
747-400
MAINTENANCE MANUAL
STA STA
633.50 520.24
PANEL
F-F
Inflight Depressurization Blowout Panels
Figure 601 (Sheet 4)
K60084
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747-400 MAINTENANCE MANUAL
(e) Install the blowout panel as follows: 1) Remove the protective cage. 2) Engage the panel in the S-shaped brackets. 3) Move the latch spring to give clearance for the panel. 4) Move the panel up into its position. 5) Engage the latch spring on the panel. 6) Install the protective cage.
S 216-006
(2) Examine the protective cage:
(a)
Make sure the wire grill cage is connected to the floor panel through the cage bracket.
(b)
Make sure the open end of the U-clips for the retaining cage bracket points into the cage.
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747-400 MAINTENANCE MANUAL
SKIN - DESCRIPTION AND OPERATION
________________________________
1. General_______
A. All exterior fuselage skins are of clad aluminum to provide a surface that is resistant to corrosion. The design of these skins provides for alternate load paths in the event of a local failure.
B. Thickness of fuselage skins varies according to applicable loads. The heaviest skins are those in lower fuselage surrounding cutout for wing and main landing gear. Doublers and triplers are used with the basic fuselage skins surrounding the main entry doors. The doublers and/or triplers around cutouts are bonded or fay surface sealed and riveted to skin.
C. Typical reinforcement of skin in areas other than around an opening is with circumferential doublers at each frame and bulkhead and where required, longitudinal doublers between stringers and skin (Fig. 1). Both types of doublers are bonded to skin.
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