S 424-215

 (17)
 Connect the refrigeration ducts at the joints between the center and side galley sections if it is applicable.

 S 424-217

 (18)
 Connect the tubing connections that go across the galley separation lines and attach with a clamp if it is necessary.

 NOTE:____Use MIL-T-27730 on the components with a pipe thread. Use your hand to tighten the plastic fittings.
 S 424-218
 (19)
 Connect the electrical connections that go across the galley separation lines.

 (20)
 Connect the electrical connections to the airplane system.

 S 424-220

 (21)
 Connect the water supply lines and the drain line to the airplane systems.

 S 424-219
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747-400 MAINTENANCE MANUAL
 S 424-221
 (22)
 Connect the galley ground cable to the static ground stud on the airplane.

 S 434-085

 (23)
 Install the galley compartment doors in each galley section.

 F. Put the Airplane in the Usual Condition.
 S 414-086
 (1)  
Install the galley equipment.

 S 414-087

 (2)  
Install the new filter element.

 S 864-088

 (3)  
Pressurize the passenger water system (AMM 38-15-00/201).

 S 864-089

 (4)  
Open the water shutoff valve in the top section of the aft galley.

 S 844-090

 (5)  
Open the spigot on the coffeemaker to remove the air from the system.

 S 794-091

 (6)  
Do a check of the connections for leaks.

 S 864-093

 (7)  
Supply the electrical power (AMM 24-22-00/201).

 S 864-094

 (8)  
Remove the DO-NOT-CLOSE tags and close these applicable circuit breakers:

 (a)  
P180 DC Power Distribution Panel
 1) 180D8, GALLEY DC PWR & CONT-2
 2) 180D24, CHILLER CONT

 (b)  
P414 Power Distribution Center - Left
 1) 414M15 - GALLEY LIGHTING, UPPER DECK
 2) 414N26, U/D GALLEY FEEDER A

 (c)  
P415 Power Distribution Center - Right
 1) 415N14, U/D GALLEY FEEDER B

 S 714-239
 (9)  
Make sure the galley equipment and lights operate correctly (AMM 25-32-00/501 ).

 S 714-111

 (10)
 Do a check for the correct operation of the control panel for the lavatory smoke detector (AMM 26-13-00/501).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 S 864-096
 (11)
 Remove the electrical power if it is not necessary (AMM 24-22-00/201).

 S 424-152

 (12)
 Install the closeout seal (AMM 25-20-01/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 LAVATORIES - DESCRIPTION AND OPERATION
______________________________________
 1.  General______
 A.  The lavatory modules are made of glass prepreg/NOMEX cored honeycomb sandwich panels including door, ceiling panel, floor panel, side wall, door wall, sink wall and toilet shroud wall. The toilets include the following components: dispenser cabinet, sink cabinet, toilet shroud, water system installation and electrical system installation. They have various lavatory equipment and accessories such as dispenser and disposal equipment, speaker, light, information sign, passenger service unit, ventilation, fire extinguisher, oxygen box, smoke detector, etc.
　
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