53-52-01
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747-400 MAINTENANCE MANUAL
NOSE RADOME - CLEANING/PAINTING
_______________________________
1. General_______
A. This procedure has one task. This task gives instructions to clean and paint the nose radome.
B. Moisture can cause damage to the nose radome if it is not protected. The primer and the paint on the surface of the radome protect it from moisture. It is not satisfactory for untreated radome surfaces to be exposed to the weather.
TASK 53-52-01-307-001
2. Nose Radome - Painting______________________
A. References
(1)
51-21-02/701, Interior and Exterior Finishes (Prepaint Cleaning and Pretreatment)
(2)
51-24-11/701, Decorative Paint System
B. Access
(1) Location Zone
111 Radome
C. Procedure
S 117-005
(1)
Do this task to clean and pretreat the nose radome: "Interior and Exterior Finishes (prepaint cleaning and pretreatment) Cleaning and Painting" (Ref 51-21-02/701).
S 377-006
(2)
Do this task to paint the nose radome: "Decorative Paint System" (Ref 51-24-11/701).
S 227-008
(3)
Examine the thickness of the paint in the rain erosion area of the nose radome.
NOTE: The thickness of the paint must be between 4 to 6 mils.
____
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747-400 MAINTENANCE MANUAL
NOSE RADOME SNUBBER - REMOVAL/INSTALLATION
__________________________________________
1. General_______
A. This procedure has two tasks to remove and install the higher and lower nose radome snubbers.
TASK 53-52-03-004-006
2. Remove 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 034-011
CAUTION: WHEN YOU OPEN 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.
(1)
Use the 5/16-inch Allen Wrench to release the six latches.
S 014-007
(2)
Move the radome open.
S 014-008
(3)
Hold the radome open with the hold-open lock.
S 024-012
(4)
Remove the snubber:
(a) Examine the dimension between the top face of the lower bearing and the shoulder on the torque shaft. 1) Make sure the dimension is approximately 2 inches.
CAUTION: PUT THE SPACER IN THE CORRECT LOCATION BEFORE YOU LOOSEN
_______ THE NUT ABOVE THE HIGHER SNUBBER. IF THE SPACER IS ON THE INCORRECT LOCATION, THE RADOME ASSEMBLY CAN MOVE DOWN AND CAUSE DAMAGE TO THE EQUIPMENT.
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