777 AIRCRAFT MAINTENANCE MANUAL
CARGO HANDLING SYSTEM -GUIDE ROLLERS
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CARGO HANDLING SYSTEM -BALL PANEL
Purpose
The ball panels do these functions:
*
Make a low friction surface to help in the movement of cargo
*
Supply a primary bearing surface to transmit cargo loads to the airframe
*
Make a surface to walk on.
Physical Description
Airplanes with a large forward cargo door and a small aft cargo door have five ball panel in the forward compartment and three ball panels in the aft.
The panels are two sheets of aluminum that are bonded and riveted to a corrugated inner core. The inner core is made of channels and doublers. Each ball panel has insert cups that let the ball transfer units (BTU) lock to the panel.
Each BTU locks into an insert cup with two latches.
Location
The panels are adjacent to the forward and aft cargo doors (not shown). The panels are in container bays B and C for the forward compartment.
The panels are in container bay E in the aft cargo compartment (not shown).
Training Information Point
BTUs are LRUs.
WARNING: BE CAREFUL WHEN YOU WALK ON THE BALL PANELS OR ALONG THE FLOOR PANELS IN THE CARGO COMPARTMENT. THE COMPONENTS IN THE CARGO COMPARTMENT CAN MOVE AND CAUSE YOU TO FALL.
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777 AIRCRAFT MAINTENANCE MANUAL
CARGO HANDLING SYSTEM -BALL PANEL
EFFECTIVITY BEJ ALL 25-53-00
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CARGO HANDLING SYSTEM -ROLLER TRAY
Purpose
The roller trays do these functions:
*
Make a low friction surface to help in the forward and aft movement of cargo
*
Supply a primary cargo load bearing surface
*
Supply a place to mount cargo handling system components.
Physical Description
The roller trays have rollers and a tray.
These cargo handling components mount to the trays:
*
End stops
*
Pallet locks (fwd compartment only)
*
Stop/locks (fwd compartment only)
*
Partial load stops.
Location
Roller trays are forward and aft of the ball panels in the forward and aft cargo compartments. There are eight columns of roller trays across each compartment. There are different tray lengths.
In the forward cargo compartment each column has four trays. In the aft cargo compartment the columns along the sides of the compartment have five trays (not shown). The columns along the middle of the compartment have three trays (not shown).
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777 AIRCRAFT MAINTENANCE MANUAL
CARGO HANDLING SYSTEM -ROLLER TRAY
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CARGO HANDLING SYSTEM -SIDE GUIDE RAIL
Purpose
The side guide rail has these functions:
*
Gives lateral alignment and longitudinal guidance to the cargo
*
Gives the cargo lateral and vertical restraint
*
Gives a place to tie down cargo.
Physical Description
The side guide rail has these parts:
*
Anchor fitting
*
Roller
*
Vertical restraint
*
Guide rail.
Location
Side guide rails are along the sides of the cargo compartment, except in the cargo door sill area. In the forward cargo compartment there are five on the left side and four on the right side of the compartment. In the aft cargo compartment there are six on the left side and five on the right side of the compartment (not shown).
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777 AIRCRAFT MAINTENANCE MANUAL
CARGO HANDLING SYSTEM -SIDE GUIDE RAIL
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CARGO HANDLING SYSTEM -CENTER GUIDE -INTRODUCTION
General
There is only one type of center guide. This type of guide is foot operated and can be locked down if necessary.
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