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 1) On the load control center - right panel, P6:
 a) PILOTS BKGD LTS
 b) PILOTS STANDBY BKGD LIGHTS
 (c) On the P1 panel, rotate the BACKGROUND control from the OFF
 position to the full BRIGHT position.
 1) Make sure that the fluorescent lamps come on and get
 stronger as the control is rotated clockwise.
 (d) After three hours, do a test of the new lightshield ballast
 again to make sure that the new lightshield ballast operates
 correctly.
 (8)  Remove electrical power if it is not necessary for other tasks
 (AMM 24-22-00/201).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
TROUBLE  PROBABLE CAUSE  ISOLATION PROCEDURE  REMEDY 
inoperative Map light dim Lights will not inoperative or reading light Flight kit light inoperative White dome light  faulty transformer Burned out bulb, Shorted variable potentiometer transformer or light assembly potentiometer on faulty switch or or faulty switch Burned out bulb, Burned out bulb  former as necessary former. Replace trans-voltage through trans-remains off, check for bulb was faulty. If light on circuit. If light OK, Relamp map light and turn light intensity. If lights check for variation in control back and forth and Rotate variable transformer transformer is faulty do not dim, variable faulty to illuminate, assembly is brightness. If light fails If other lights on circuit OK, dome light is faulty. circuit are operative. If Observe other lights on the faulty off, switch is probably Observe light is maximum  Relamp light. former Replace trans-potentiometer transformer or assembly Replace switch Replace variable replace light Relamp light, Relamp dome light. 

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 AFDS FLOODLIGHT - REMOVAL/INSTALLATION
______________________________________
 1.  General
_______
 A.  This procedure contains two tasks:
 (1)  
The removal of the AFDS (Automatic Flight Director System) floodlight (referred to as the floodlight).

 (2)  
The installation of the AFDS floodlight.

 TASK 33-11-71-004-001
 2.  AFDS Floodlight Removal (Fig. 401)
_______________________
 A.  General
 (1)  The AFDS floodlight is installed above the AFDS MCP (Mode Control Panel) in the pilot's lightshield.
 B.  Standard Tools and Equipment
 (1)  String, ten foot length
 C.  Access
 (1)  Location Zone
 101 Control Cabin - Left
 102 Control Cabin - Right

 D.  Procedure
 S 864-030
 (1)  Prepare for the Removal:
 (a)  Open this circuit breaker and attach a DO-NOT-CLOSE tag:
 1)  P6 Load Control Center - Right a) AFDS FLOOD LT
 S 024-026
 (2)  Remove the floodlight:
 (a)  Loosen the screws on the AFDS MCP.
 NOTE: It is not necessary to remove the MCP to replace the
____
 floodlight.

 (b)  
Find the floodlight wires below the left side of the lightshield.

 (c)  
Disconnect the connector.

 (d)  
Attach a string to the floodlight wires.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL

SECTION A-A

AFDS Floodlight Installation

Figure 401

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