ESCAPE SLIDE GAS SUPPLY HOSE  CHUTE  ENTRY DOORWAY BOTTLE STORED GAS 
GIRT ESCAPE SLIDE 
SWIVEL FITTING 
SHROUD 

ESCAPE SLIDE DEPLOYED

Escape Slide Operation
Figure 2 (Sheet 1)

RAMP PLATE
FLOOR RAMP
FWD INBD
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
B40487
A
747-400 MAINTENANCE MANUAL
ESCAPE ASSEMBLYSLIDE IN (OVERBOARDING)PACK GAS DEPLOYMENT POSITIONPACKBOARD SUPPLY
(POSITION PRIOR HOSE
TO DEPLOYMENT) FLIGHT COMPARTMENTCHUTE ENTRY DOOR THRESHOLD
TORQUE TUBE
(PIVOT POINT)

PACKBOARD RETAINING GIRT
DEPLOYMENT SEQUENCE
Escape Slide Operation
Figure 2 (Sheet 2)

SLIDE
DEPLOYING

PACKBOARD
PACKBOARD ANCHORED TO FUSELAGE AND SLIDE INFLATES
FUSELAGE
B40490
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (7)  
The escape slide turbine pumps are driven by the stored gas bottle gas flow and induce ambient air into the escape slide. The induction of ambient air occurs in two pumping stages: the first stage for high volume induction at low pressure, the second stage at lower volume induction against the increasing back pressure of the air and gas in the escape slide. As the pressure of the stored gas bottle decays, check valves close to maintain slide pressure. Inflation of the escape slide is completed approximately 5 seconds after stored gas bottle gas flow release.

 (8)  
The slide does not deploy completely to reach the ground, until inflation has built up enough pressure to apply sufficient tension on the slide retaining straps. This ensures the slide will be rigid enough to oppose nominal wind forces and keep the slide deployed to align with the doorway.

 (9)  
The slide girt is retained at the doorway by a girt bar inserted in the girt fold and locked in the chute channel.

 (10)
 As the chute rotates to rest on the doorway threshold a ramp plate is raised from the base assembly platform to align with the inboard edge of the chute and provide a level walkway to the door opening.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
FLOOR-MOUNTED ESCAPE SLIDE
COMPONENT  SHT 102 FIG.  QTY  X ACCESS/AREA  REFERENCE 
CABLE - INFLATION TRIGGER BOTTLE - STORED GAS PACK - FLOOR-MOUNTED ESCAPE SLIDE HANDLE - MANUAL INFLATION  1 1 1 1  1 1 1 1  STORED GAS BOTTLE ESCAPE SLIDE PACK PART OF STORED GAS BOTTLE BETWEEN ESCAPE SLIDE PACK AND INBOARD OF UPPER DECK DOOR PART OF EACH FLOOR-MOUNTED  25-68-00 25-68-00 25-68-00 25-68-02 

Floor-Mounted Escape Slide - Component Index
Figure 101

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C08318
A
747-400 FAULT ISOLATION/MAINT MANUAL
SEE A
SEE B

FLOOR-MOUNTED
ESCAPE SLIDE

UPPER DECK COMPARTMENT  RUBBER
PADS

ESCAPE SLIDE PACK
SEE B
INFLATION
TRIGGERING
CABLE

SHROUD
PACKBOARD CHUTE ESCAPE SLIDE
EXTENSION PANEL GAS SUPPLY HOSE
GIRT BAR RETAINER CHANNEL
　
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