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A
747-400 MAINTENANCE MANUAL
 NOSE GEAR BULLNOSE ASSEMBLY - REMOVAL/INSTALLATION
__________________________________________________
 1.  General
_______
 A.  The bullnose assembly is installed below the upper tripod brace and shock strut trunnion. The bullnose assembly does as a baffle. It turns the airflow away from the nose gear when the gear is down and the gear doors are open.
 B.  The bullnose assembly has three parts, the right box assembly, the left box assembly and the forward deflector assembly. These must be disassembled during the removal operation.
 TASK 32-21-07-004-001
 2.  Bullnose Assembly Removal (Fig. 401)
_________________________
 A.  References
 (1)  
09-11-00/201, Towing

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

 (3)  
AIPC 32-61-58-01, AIPC 53-15-01-01

 B.  
Access

 (1)  
Location Zone
 715 Nose Landing Gear

 C.  
Prepare for the removal.

 S 864-013
 WARNING: YOU MUST CAREFULLY INSTALL THE GROUND LOCKS IN ALL LANDING
_______ GEAR. AN ACCIDENTAL RETRACTION OF THE LANDING GEAR CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (1) Install the ground locks in all landing gear (Ref 09-11-00/201).
 S 494-014
 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.
 (2)  Do this task: "Installation of the Door Locks on the Nose Landing Gear" (Ref 32-00-30/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-21-07
 ALL  ú ú 01 Page 401 ú Feb 18/01
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747-400
MAINTENANCE MANUAL

CONDUIT FLEXIBLE 
SEE  A  NUT COUPLING UPPER 
DRAG STRUT TRIPOD APEX  SEE  C  BEARING (2) TRUNNION BRACKET CONDUIT 
ASSEMBLY BULLNOSE  SEE  B 
CONTROL PANEL (P37) 

BRACE TRIPOD UPPER  BRACKET CONDUIT A 
CONDUIT ELECTRICAL 
CLAMP WIRE CONDUIT 
FORWARD ASSEMBLY DEFLECTOR  B 
Figure 401 (Sheet 1) Bullnose Assembly Installation for the Nose Landing Gear 

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-21-07
 ALL  ú ú 01 Page 402 ú Oct 10/91
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747-400
MAINTENANCE MANUAL

SHOCK STRUT 
TRUNNION  CLAMP 
(2 LOCATIONS) 
SPLICE CHANNEL  RIGHT BOX  ALUMINUM 
(RIGHT SIDE  ASSEMBLY  FOIL TAPE 
4 LOCATIONS)  (2 LOCATIONS) 
CUSHION 
(2 LOCATIONS) ATTACHED BOLT  (4 LOCATIONS) 
ATTACHED 
BOLT 
(2 LOCATIONS)  ATTACHED 
BOLTS 
(29 LOCATIONS) 

SEE D
CROSS 
ATTACHED BOLT  BEAM 
SPLICE  (4 LOCATIONS)  LEFT BOX  ASSEMBLY 
ASSEMBLY  ASSEMBLY 

SEE E
FORWARD DEFLECTOR ASSEMBLY FWD
C
Bullnose Assembly Installation for the Nose Landing Gear Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 32-21-07
 ALL  ú ú 01 Page 403 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

CLAMP
ALUMINUM
FOIL TAPE

1.35 INCHES MIN
1.25
INCHES
0.80 FWD
UPPER
TRIPOD

CUSHIONS RUB BLOCKBRACE
　
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