(2)  
The left dome light also supplies emergency general lighting if there is a complete electrical power failure.

 (3)  
The captain's and first officer's stations are lighted with fluorescent and incandescent lights. There are lights in the lightshield, above the main instrument panels, and in the panels and instruments. The fluorescent floodlamps in the lightshields supply high intensity lighting.

 (4)  
Special lighting for the observer's station is supplied by a reading light.

 B.  For more data about this lighting system, refer to these sources:
 (1)  SSM 33-11-01 thru SSM 33-17-99
 (2) WDM 33-11-11 thru WDM 33-17-99Panel or Instrument Light
_________________________
 A.  Lighting is supplied from behind the surface of the pilots' panels and most of the instruments with small incandescent lamps.
 (1)  
The lamps operate on 5 volts.

 (2)  
Each lightplate of the pilots' panels contains two or more of the small lamps. This keeps sufficient lighting of the lightplate if only some of the lamps come on.

 (a)  
If the lighting becomes too dim, then you must replace the lightplate.

 (b)  
To use a lightplate again, you must first send it to the shop for lamp replacement. Instructions for lamp replacement are in the vendor's manual.

 B.  The 28 volts ac transfer buses No. 1 and No. 2 supply electrical power to the lighting controls.
 (1)  
Each lighting control supplies 0 to 28 volts ac to a step-down autotransformer. The autotransformer then supplies 0 to 5 volts ac to the lamps.

 (2)  
The lighting control for each instrument panel is on or adjacent to that instrument panel.

 C.  If there is a electrical power failure, then the 26 volts ac standby bus supplies electrical power to the lamps in some flight control instruments.
 (1) A relay automatically changes the electrical power source from the
 transfer bus to the standby bus.AFDS Floodlight
_______________
 A.  The AFDS floodlight is above the AFDS controller and adjacent to the pilot's lightshield.
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 33-11-00
 ALL  ú ú 01 Page 1 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
CIRCUIT BREAKERDOME
LIGHTSHIELD  PANEL FLOODLIGHT
LIGHT SEE A
SWITCH EMERGENCY LIGHTING
LIGHTING
SEEB 3 CONTROLS
SWITCH CIRCUIT BREAKER
SEE C SEE DPANEL FLOODLIGHT MAP LIGHT
CONTROL STAND FLOODLIGHT
STANDBY LIGHTING
COMPASS CONTROLS
MAP LIGHT PANELSEE E LIGHTING
CONTROL
SEE F MAP LIGHTING CONTROL
SPARE SEEG 1
LAMP
BOX
CIRCUIT
BREAKER
PANEL
CIRCUIT FLOODLIGHT
BREAKER PANEL FLOODLIGHT
MAP LIGHTING CONTROL
FLIGHT  FLIGHT 
KIT LIGHT  LIGHTING  MAP LIGHTING  KIT LIGHT  SEE  G  2 
CONTROLS  CONTROL 
SEE  H  SEE  G  2  CIRCUIT BREAKER 
PANEL FLOODLIGHT 

FLIGHT COMPARTMENT
1
THE CAPTAIN'S MAP LIGHTING CONTROL IS ON THE INSTRUMENT PANEL, P1, OR ON THE SIDE PANEL, P21.
2
THE FIRST OFFICER'S MAP LIGHTING CONTROL IS ON
THE INSTRUMENT PANEL, P3, OR ON THE SIDE PANEL, P23.

3
THE DOME LIGHTING CONTROL IS ON THE LEFT SIDE OR IN THE CENTER OF THE AFT OVERHEAD PANEL, P5.
Flight Compartment Lighting - Component Location Figure 1 (Sheet 1)
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 33-11-00
 ALL  ú ú 01 Page 2 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

LIGHTSHIELD

IF INSTALLED
Flight Comartment Lighting - Component Location Figure 1 (Sheet 2)
A05924
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