DIRECTIONAL GUIDE PANEL
N
Main Deck Cargo Restraining Equipment
Figure 1 (Sheet 8)

C87548
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BUMPER
SLIDE SIDE FITTING
BUMPER
STOP

CARRIAGE
BEAM SPANNER
SHOCK ABSORBERS
SHEAR PLATE
SHEAR STUD TENSION STUD
(6 LOCATIONS)

(8 LOCATIONS)
FIXED CENTERLINE BUMPER
O
LATCH
SIDE FITTING
RETRACTABLE
BUMPER NOSE
SEAT TRACK
(REF)

SHOCK ABSORBERS
TENSION STUD
(8 LOCATIONS)

RETRACTABLE CENTERLINE BUMPER
P
Main Deck Cargo Restraining Equipment
Figure 1 (Sheet 9)

C87549
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

CARGO ROLLER
TIEDOWN (2 LOCATIONS)
RING
END LOCK
BOLT
RETRACTABLE END LOCK 
(2 LOCATIONS) LOCKING LEVER  Q 
CARGO TIEDOWN 
RING 
VERTICAL AND AFT RESTRAINT  CARGO TIEDOWN RING  VERTICAL AND 
AFT RESTRAINT 
RELEASE 
HANDLE 

ROLLER
RELEASE
HANDLE

ROLLER
ATTENUATING END STOPFIXED END STOP SR
VERTICAL AND
VERTICAL AND AFT RESTRAINT
FORWARD RESTRAINT
RELEASE CARGO
ROLLER LEVERLOCKINGTIEDOWN LEVERRING
SHOCK ABSORBER
ROLLER
LEVER RELEASE
ATTENUATING/RETRACTABLE
LOCKING LEVER
RETRACTABLE END STOP  END STOP
T U
Main Deck Cargo Restraining Equipment Figure 1 (Sheet 10)
C87557
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
KNOCKDOWN RESTRAINT
(FOR 88-INCH WIDE CARGO)

PLUNGER VERTICAL
RELEASE LEVER
VERTICAL
RESTRAINT LIP

CASTER
LOCK PLUNGER

LOCK LEVER KNOCKDOWN RESTRAINT (FOR 88-INCH WIDE CARGO)
RETRACTABLE VERTICALPLUNGERCENTER GUIDE RESTRAINT LIP
RELEASE LEVER VERTICAL RESTRAINT LIP
RETRACTABLE CENTER GUIDE/RESTRAINT
(WITH CASTERS) ROLLER
LOCK
V

PLUNGER
LOCK LEVER
RETRACTABLE VERTICAL
CENTER GUIDE RESTRAINT LIP
RETRACTABLE
CENTER GUIDE

RETRACTABLE CENTER GUIDE/RESTRAINT (WITH ROLLERS) VERTICAL
W
RESTRAINT LIP
ROLLER
PUSH ARM
KNOCKDOWN RESTRAINT
LOCK
(FOR 88-INCH WIDE CARGO)
PLUNGER VERTICAL
RETRACTABLE CENTER GUIDE/RESTRAINT
RESTRAINT LIP
PLUNGER
(WITH ROLLERS)
RELEASE LEVER
X  VERTICAL RESTRAINT LIP
LOCK PLUNGER
LOCK LEVER
RETRACTABLE CENTER GUIDE
RETRACTABLE CENTER GUIDE/RESTRAINT
Y
Main Deck Cargo Restraining Equipment
Figure 1 (Sheet 11)

C87558
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 7.  Outboard Guide/Restraint Rails (Fig. 1)
______________________________
 A.  The outboard edges of the main deck cargo compartment is established by a series of guide/restraint rails. Each rail consists of retractable side lock restraints, swiveling vertical restraints and cargo tiedown fittings. Side lock restraints are extended and retracted by lowering and raising the side lock release handles outboard of the rail. Adjacent guide/restraint rails are linked together with retractable coupling plungers and fittings at each end of the rails. The rails attach to rail supports which are secured to the seat tracks and floor fittings. Each rail support contains a retaining pin and release handle for attachment to guide/restraint rails. Removal of guide/restraint rail from rail supports is accomplished by rotating release handle to vertical position and withdrawing handle outboard to disengage retaining pin from rail. Some rail supports contain a roller which serves as part of the conveyor system or a leaf spring to absorb the impact of cargo units.
　
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