747-400
MAINTENANCE MANUAL

UPPER SNUBBER
SEE A LATCH (8 LOCATIONS)(REF)
UPPER SNUBBER
ATTACH TUBE TORQUE NUT
BLEED PLUG
LOWER
SNUBBER

NOSE RADOME
FILL PLUG
SPACER RING
BLEED PLUG
GROOVE PLATE
TORQUE TUBE (REF)
NOSE RADOME SNUBBER
(UPPER SNUBBER SHOWN, LOWER SNUBBER
ALMOST THE SAME)

A
Nose Radome Snubber Installation Figure 401
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (b)  
Install spacer sections between the lower bearing and the shoulder on the torque shaft.

 (c)  
Install a clamp on the torque shaft.

 (d)  
Remove the nut that holds the snubber.

 (e)  
Remove the snubber.

 TASK 53-52-03-404-014
 3.  Install the Nose Radome Snubber.__________________________________
 A. References
 (1)  
12-12-03/301, Nose Radome Hinge Snubber

 (2)  
IPC 53-52-03 Fig. 1

 B. Access
 (1)  Location Zone
 111 Radome

 C. Procedure
 S 424-009
 (1)  Install the snubber.
 (a)  
Align the spline on the snubber with the spline on the torque shaft.

 (b)  
Install the snubber.

 (c)  
Install the attach nut.

 (d)  
Remove the clamp and the spacers from the torque shaft.

 S 414-010
 CAUTION: WHEN YOU CLOSE THE NOSE RADOME LATCHES, MAKE SURE YOU ALIGN THE
_______ HEX WRENCH WITH THE WRENCH RECESS (APPROXIMATELY 60 DEGREES TO THE RADOME SURFACE). DAMAGE CAN EASILY OCCUR TO THE LATCH MECHANISM IF THE HEX WRENCH IS INCORRECTLY ALIGNED DURING THE LATCH OPERATION.
 (2) Use the 5/16-inch hex wrench to close and latch the nose radome.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 LIGHTNING DIVERTER STRIPS - MAINTENANCE PRACTICES
_________________________________________________
 1. General
_______
 A. This procedure contains three tasks:
 (1)  
The removal of the lightning diverter strips of the nose radome

 (2)  
The installation of the lightning diverter strips

 (3)  
The inspection of the lightning diverter strips.

 (4)  
You must do these steps to remove a diverter strip:

 (a)  
Open the nose radome

 (b)  
Pull the diverter strip from the radome

 (c)  
Clean the sealant from the radome.

 (5)  
You must do these steps to install a diverter strip:

 (a)  
Prepare a radome surface

 (b)  
Bond the diverter strip to the radome

 (c)  
Examine the electrical resistance.

 (6)  
You must do these steps to examine the diverter strips:

 (a)  
Visually inspect for the damage

 (b)  
Examine the electrical resistance.

 TASK 53-52-04-002-001
 2. Nose Radome Lightning Diverter Strip Removal
____________________________________________
 A. Consumable Materials
 (1)  
B00148 Solvent - Methyl Ethyl Ketone (MEK), TT-M-261

 (2)  
G00033 Cheesecloth - BMS 15-5

 B. References
 (1)  53-52-01/201, Nose Radome
 C. Procedure
 S 012-002
 (1)  
Open the nose radome and keep it in the open position or remove the radome (Ref 53-52-01/201).

 S 022-003

 (2)  
Remove the lightning diverter strip (Fig. 201).

 (a)  Remove the screws that attach the diverter strip to the radome.
 NOTE: Remove the nuts from the inner side of the radome
　
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