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 B.  The three turbine pumps are secured to the slide chute, at the upper end, one on each side and one in the center. The two outboard pumps are enclosed within the chute folding, the center pump is cradled in a support mounted in the packboard assembly.
 C.  The turbine pumps, using the stored gas bottle pressurized gas flow as a pumping force, induce ambient air several times the volume of the stored gas bottle gas flow to inflate the slide chute to a useable pressure.
Stored Gas Bottle (Fig. 1)
_________________
 A.  The stored gas bottle is provided to supply pressurized gas flow to the slide chute turbine pumps for slide inflation.
 B.  The stored gas bottle is mounted in the bottle cradle support and secured by two hinged segments of the support. The hinged segments are fastened together over the top of the bottle by two quick-release pins. Rubber seats and pads attached to the support, cushion the bottle against vibrations.
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A
747-400
MAINTENANCE 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
CHUTE
SLIDE INFLATION
STORED GAS BOTTLE

CHUTE TORQUE
BASE ASSEMBLY BAR
(PLATFORM) SWIVEL
FITTING
FLOOR INBD FWDTRACKS
SLIDE IN OPERATION-READY POSITION
A
Floor-Mounted Escape Slide - Component Location Figure 1 (Sheet 1)
B40471
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A

747-400 MAINTENANCE MANUAL
CHUTE CHUTE EXTENSION PANEL AND
EXTENSION PACKBOARD LOCKING PLATE
PANEL

MANUAL INFLATION HANDLE
ESCAPE
SLIDE
PACK

FLOOR
ENTRY

TRACKS
DOORWAY

CHUTE INBDFWD
FLOOR PACKBOARD
TRACK FLOOR
RELEASE RAMP
SHROUD PACKBOARD (PAWL LOCKS)
BASE ASSEMBLY MANUAL RELEASE
(PLATEFORM) ASSIST HANDLE HANDLE BOTTLE FIRING
SLIDE IN OPERATION-READY POSITION
LANYARD
PIVOT SUPPORT
RETAINER
B SPRING  REGULATOR
MANUAL BOTTLE
INFLATION
HANDLE OUTBOARD HINGED SECTIONCABLE ASSEMBLIES
GAS SUPPLY HOSE (2 LOCATIONS) STOWAGE CONTAINER RETAINER PIN
STORED FWD
(2 LOCATIONS) GAS
INBOARD BOTTLE
HINGED SECTION
INBD
CRADLE SUPPORT ASSEMBLY
BASE ASSEMBLY (PLATFORM)
STORED GAS BOTTLE INSTALLATION
C

Floor-Mounted Escape Slide - Component Location
Figure 1 (Sheet 2)

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B40484
A
747-400
MAINTENANCE MANUAL

 4.  Inflation Triggering Mechanism (Fig. 1)
______________________________
 A.  Operation (ignition) of the stored gas bottle, is initiated by a load applied to the bottle firing lanyard. The firing lanyard (approximately 6-inches long) is supplied and installed in each stored gas bottle and connected to the triggering mechanism mounted on the bottle cradle support. The free ball end of the bottle firing lanyard is inserted into a slotted hole in the firing mechanism spring-loaded retainer.
 B.  The ignition load is applied to the bottle firing lanyard, by the inflation cable connected between the trigger mechanism cable assembly and the top of the packboard assembly. When the escape slide pack assembly (including the packboard assembly) is deployed out of the doorway, tension is applied to the inflation cable and transfers a pull-load to the triggering mechanism cable and the bottle firing lanyard.
　
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