S 715-024

 (2)  
Operate the two hot and cold water spigots of the water boilers and coffeemakers. Let the water drain into the sinks.

 S 795-025

 (3)  
Make sure that there are no leaks in the water tubing or fittings in the galley units.

 S 795-026

 (4)  
Make sure that there are no leaks in the water supply connectors at the interface.

 S 795-027

 (5)  
Put the water through the drain lines, and make sure that no leakage occurs.

 E.  Do a test of the Operation of the Galley Light
 S 865-028
 (1)  
Set the light switch to the DIM position.

 (2)  
Make sure that the ceiling light goes dim.

 (3)  
Set the light switch to the BRIGHT position.

 S 715-029
 S 865-030
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747-400 MAINTENANCE MANUAL
 S 715-031
 (4)  Make sure that the ceiling light goes bright.
 F.  Do a test of the Operation of the Refrigeration System (Galleys with Refrigeration System)
 S 865-076
 (1)  Make sure the ambient air temperature at the intake area of the chiller is below 80°F. Use a thermometer with F (Fahrenheit) degree graduations.
 NOTE: High ambient temperatures can change the condition of the
____ refrigeration system test. It is recommended that you do the check during the cool part of the day. The check can also be done while the air conditioning system of the airplane is in operation.
 S 865-078
 (2)  
Close the doors for the chiller cart compartment tightly.

 S 865-079

 (3)  
Set the chiller power switch to the ON position.

 NOTE: Before the chiller power switch is operated again, you must
____
 stop for 5 minutes.

 S 715-080
 (4)  
Make sure the POWER ON light is on.

 S 715-082

 (5)  
Operate the chiller, until the temperature indicator on the panel shows the lowest indication.

 (6)  
Make sure the chiller compartment temperature is 33° to 45°F.

 S 715-083
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747-400 MAINTENANCE MANUAL
 S 865-084
 (7)  
Set the chiller power switch to the OFF position.

 S 865-032

 (8)  
Push the REFRIG switch on the galley control panel to the ON position. Make sure that the related light comes on.

 S 715-033

 (9)  
Let the chillers operate for 5 minutes, then make sure that the refrigerated carts are cool.

 S 715-034

 (10)
 Turn on the WATER COOLER spigot, and make sure that the water is cool.

 S 865-035

 (11)
 Push the REFRIG switch to the OFF position.

 G. Do a test of the Operation for the Ovens (Galleys With Ovens)
 S 865-036
 (1)  
Set the oven timer to a time less than 5 minutes.

 S 865-037

 (2)  
Set each oven selector switch to a temperature of approximately 180 degrees F.

 S 715-038

 (3)  
Set the oven switch to the ON position and make sure that the light comes on.

 NOTE: A buzzer will operate if an oven is operated with the
____ timer not set. The buzzer will operate until you turn the switch off or until you set the timer.
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