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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (2)  
32-00-30/201, Landing Gear Door Locks

 (3)  
SSM 33-42-20

 D. Access
 (1)  Location Zone
 711 Nose Landing Gear Door Lock, Fwd Left
 712 Nose Landing Gear Door Lock, Fwd Right
 713 Nose Landing Gear Door Lock, Fwd Right
 714 Nose Landing Gear Door Lock, Fwd Left

 E. Prepare to Adjust the Light
 S 492-019
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  
Do this task: "The Installation of the Door Locks on the Nose Landing Gear" (Ref 32-00-30/201).

 S 862-034

 (2)  
Put the airplane in its usual taxi attitude (1/2 degree nose down).

 S 492-021

 (3)  
Set the targets in front of the lights (Fig. 201).

 S 862-035

 (4)  
Supply electrical power (Ref 24-22-00/201).

 S 822-036

 (5)  
Do these steps to adjust the light:

 (a)  
Put the TAXI switch on the P5 panel to ON.

 (b)  
Examine the position of the light beam on the target.

 (c)  
Adjust the adjustment screws (5) until the light beams are on the center of the target.

 (d)  
Put the TAXI switch on the P5 panel to OFF.

 (e)  
Make sure the lights are off.

 S 862-038
 (6)  Remove electrical power if it is not necessary
 (Ref 24-22-00/201).

 F. Put the airplane back to its usual condition
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH NOSE GEAR TAXI LIGHTS ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
 S 922-037
 WARNING:_______ YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Do this task:  "The Removal of the Door Locks on the Nose Landing Gear" (Ref 32-00-30/201).
 (2)  S 092-028Remove the light adjustment targets.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH NOSE GEAR TAXI LIGHTS ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 1.

2.

3.

4.

5.

A
747-400 MAINTENANCE MANUAL
 NAVIGATION LIGHTS - DESCRIPTION AND OPERATION
_____________________________________________
General
_______
 A.  Quartz halogen lamps mounted behind a red, green, or white lens provide visual indication of airplane position, direction, and attitude. The red, green and white lights are located as follows: two red lights on the left wingtip; two green lights in the right wingtip; and two white lights on the tail cone. The 115-volt ac ground service bus supplies electrical power for light operation. The NAV lights switch on P5 pilots overhead panel provides control.
 B.  For more data about this lighting system, refer to these sources:
 (1) SSM 33-43-10
 (2) WDM 33-43-11Wingtip Navigation Lights
_________________________
 A.  Two colored navigation light assemblies are mounted in each forward wingtip fairing behind a clear acrylic lens. Each navigation light assembly contains a single quartz halogen lamp and a reflector mounted beneath a colored lens. The light assemblies are mounted to a bracket by three screws. The lights are removed from the airplane for relamping or replacement by opening the access door beneath the lights, disconnecting the electrical connector on the back of the light and removing the three mounting screws.
　
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