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 S 715-027
 (4)  Do a test of the captains map light: (a) Turn the control for the captains map light fully clockwise. 1) The map light control is installed on the left side of the P72 panel. (b) Make sure the map light for the captain changes to a bright intensity. (c) Turn the light control counterclockwise to the OFF position.
 S 715-030
 (5)  Do a test of the map light for the first officer: (a) Turn the map light control for the first officer fully clockwise.
 (b) (c) (d)  The map light control is installed on the right side of the P72 panel.Make sure the map light for the first officer changes to a bright intensity.Turn the map light control counterclockwise to the off position.
 S 715-028
 (6)  Do a test of the map light for the first observer: (a) Turn the map light control for the first observer fully clockwise.
 (b) (c)  Make sure the map light for the first observer changes to a bright intensity.Turn the map light control counterclockwise to the off position.
 S 715-029
 (7)  Do a test of the utility lights: (a) Turn the red knob on a utility light to the BRT position.

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747-400 MAINTENANCE MANUAL
 (b)
Make sure the utility light changes to a bright intensity.

 (c)
Turn the red knob on the utility light to the OFF position.

 (d)
Push the small button on the red knob of the utility light.

 (e)  
Make sure the utility light changes to a bright intensity.

 (f)  
Do this procedure again for the other utility lights.

 S 865-024
 (8)  Remove electrical power if it is not necessary (Ref 24-22-00/201).
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747-400 MAINTENANCE MANUAL
 PASSENGER COMPARTMENT LIGHTING - DESCRIPTION AND OPERATION
__________________________________________________________
 1.  General_______
 A.  The passenger compartment lights give general and specific lighting to the passenger areas of the upper deck. These areas include the lavatory, galley, seating area, and crew rest. The passenger information signs give instructions to the passengers during a flight of the airplane.
 B.  The lights are described in these sections:
 (1)
Passenger Information Signs (AMM 33-24-00/001)

 (2)
Lavatory Lights (AMM 33-26-00/001)

 (3)
Galley Lights (AMM 33-27-00/001)

 (4)
Upper Deck Passenger Compartment Lights (AMM 33-28-00/001)

 (5)
Crew Rest Lights (AMM 33-29-00/001)

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747-400 MAINTENANCE MANUAL
 PASSENGER INFORMATION SIGNS - DESCRIPTION AND OPERATION
_______________________________________________________
 1.  General
_______
 A.  A passenger information sign is one of these types of signs:
 (1)  
NO SMOKING sign

 (2)  
FASTEN SEAT BELT sign

 (3)  
RETURN TO SEAT sign

 (4)  
LAVATORY OCCUPIED sign

 B.  Passenger information signs give instructions to persons in the passenger compartment during a flight of the airplane.
 C.  NO SMOKING and FASTEN SEAT BELT signs are installed at location to make it possible for each person to see at least one sign at all times.
 D.  The RETURN TO SEAT signs are come on when the FASTEN SEAT BELT signs come on, except during a cabin decompression. During decompression the RETURN TO SEAT signs are off.
　
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