S 714-153
 (12)
 Make sure the guide rail operates correctly (AMM 25-58-00/501).

 S 714-154

 (13)
 Make sure the CAUTION RAILS UP warning lights are on when the guide rail is in the up position.

 E. Install the Guide/Restraint Rails
 S 214-127
 (1)  
Make sure the DOWN TO LOCK plunger levers are in the verical position (not locked position) on the supports.

 S 434-128

 (2)  
Push the catch plate at each support to release the guide rail and move the guide rail to the retracted position.

 S 434-129

 (3)  
Put the supports in position to engage the studs in the floor fittings.

 S 434-130

 (4)  
Move the guide rail outboard until the studs are in the holes in the floor fittings.

 S 434-131
 CAUTION: MAKE SURE THE PLUNGERS ARE DOWN AND THE PLUNGER LEVERS ARE IN
_______ THE HORIZONTAL POSITION. IF THE PLUNGERS ARE NOT DOWN AND THE PLUNGERS ARE NOT IN THE HORIZONTAL POSITION, THE GUIDE RAIL WILL NOT BE LOCKED CORRECTLY AND CAN CAUSE DAMAGE TO EQUIPMENT.
 (5)  
Put the DOWN TO LOCK plunger levers to the horizontal position to engage the plungers in the floor fittings

 (6)  
Put the guide rail in the up position.

 (7)  
Make sure the guide rail moves freely.

 (8)  
Put the guide rail back to the retracted position.

 S 424-132
 S 714-133
 S 424-134
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 F. Install the Park Rail
 S 214-135
 (1)  
Make sure the DOWN TO LOCK plunger levers are in the verical position (not locked position) on the supports.

 S 434-136

 (2)  
Put the supports in position to engage the studs in the floor fittings.

 S 434-137

 (3)  
Move the park rail outboard until the studs are in the holes in the floor fittings.

 S 434-138
 CAUTION: MAKE SURE THE PLUNGERS ARE DOWN AND THE PLUNGER LEVERS ARE IN
_______ THE HORIZONTAL POSITION. IF THE PLUNGERS ARE NOT DOWN AND THE PLUNGERS ARE NOT IN THE HORIZONTAL POSITION, THE GUIDE RAIL WILL NOT BE LOCKED CORRECTLY AND CAN CAUSE DAMAGE TO EQUIPMENT.
 (4)  
Put the DOWN TO LOCK plunger levers to the horizontal position to engage the plungers in the floor fittings

 S 424-139

 (5)  
Put the park rail in the up position.

 (6)  
Make sure the park rail moves freely.

 S 424-141

 (7)  
Put the park rail back to the retracted position.

 S 714-140
 G. Install the Rail Supports
 S 434-089
 (1) Lift the shear-plunger levers to retract the shear-plunger studs.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 424-090
 (2)  
Engage the tension studs on the bottom of the rail support with the holes in the seat track and the floor fitting.

 S 434-091

 (3)  
Move the rail support approximately 0.50 inch in the forward or aft direction.

 NOTE: The shear-plunger studs must align with the holes in the seat
____
 track.

 S 434-092
 (4)  Lower the shear-plunger levers to extend the shear-plunger studs into the holes in the seat track.
 H. Install the Outboard Guide/Restraint Rails
 NOTE: The guide/restraint rail at STA 2130-2200 must be installed before
____ you install the guide/restraint rail at STA 2060-2130. The aft rail support at STA 2193.95 must be attached to the rail before you install the rail to the remaining rail supports.
 S 434-093
 (1)  
Retract the retaining pins in the rail supports:

 (a)  
Push the retaining pin lock on the retaining pin handle.
　
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