(b)
Make sure the guide/stop head retracts to the height of the base.
S 715-089
(3) Push down on the guide/stop head and make sure it does not retract.
G. Side Door Sill Roller/Caster and Guide Assembly Operation Check
NOTE: The side cargo door must be sufficiently opened to permit
____ deployment of the sill assembly. Refer to 52-32-00/001, Side Cargo Door, for instructions to open the door.
S 715-013
(1)
Release the holddown strap at the forward and aft end of the sill assembly.
S 715-090
(2)
Lift and fold each sill assembly out and down until the latch shaft for the side cargo door supports it in the extended position.
(a) Make sure the sill assembly unfolds smoothly and touches the latch shaft.
S 715-014
(3) Push down on the two stowage release plungers at each end of the sill assembly.
(a) Make sure the side guides unlock and move smoothly to the extended (vertical) position.
NOTE: The side guides should lock in the extended position.
____
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747-400 MAINTENANCE MANUAL
S 715-015
(4)
Make sure all rollers, casters, and bearings turn smoothly and freely.
S 715-016
(5)
Make sure the top of the rollers and casters on each sill assembly align with each other and with the conveyor plane for the interior side door cargo transfer area.
S 715-017
(6)
Lift the side guide stowage lock release levers on each sill assembly.
NOTE: The stowage lock release levers are in the side guide stowage
____
wells adjacent to the sill assembly hinge.
S 715-091
(7) Push down on the side guides until they lower and lock in the retracted (horizontal) position.
(a) Make sure the side guides lock in the retracted position.
S 715-018
(8) Lift and fold each outboard sill assembly upward and inboard on each inboard sill assembly.
(a)
Make sure the sill assembly folds smoothly and freely.
(b)
Make sure each sill assembly rests firmly on the stowage stops.
(c)
Engage the holddown strap at each end of the sill assembly to hold it in the stowed position.
H. Retractable Lateral Guides Operation Check
S 715-019
(1) Operate the release lever for the stowage lock plunger until the lateral guide unlocks and moves to the extended (vertical) position.
NOTE: The lateral guides do not lock in the extended (vertical)
____
position.
S 715-092
(2)
Make sure the lateral guide unlocks and moves smoothly and freely.
(3)
Make sure the rollers and bearings turn smoothly and freely.
S 715-020
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747-400 MAINTENANCE MANUAL
S 715-021
(4) Push down on the lateral guide until the guide locks in the
retracted (horizontal) position.
(a)
Make sure the lateral guide moves smoothly and freely.
(b)
Make sure the lateral guide is kept below the top of the adjacent casters and rollers in the side door cargo transfer area.
I. Retractable Center Guide/Restraints Operation Check
S 715-022
(1) Make sure the rollers or casters (if installed) turn smoothly and freely.
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