C. Get Access
(1) Open the nose gear doors (Ref. TASK 32-22-00-010-001).
(2) Put the access platform in position. Subtask 32-21-00-916-050
D. Installation of the Protective Coverings
(1) You must protect these items:
-the tires
-all rubber items (caps, bellows)
-
the sliding assemblies
-
the hinges
-
the electrical harnesses, connectors and proximity detectors.
4. Procedure
_________
(Ref. Fig. 701/TASK 32-21-00-991-001) Subtask 32-21-00-110-050
A. Cleaning of the Nose Landing Gear
(1)
If there is some mud, remove it:
-use water to make it become soft
-remove it with a wooden or plastic scraper and a sponge soaked in water.
(2)
Dry the areas where you removed the mud.
(3)
Clean the landing gear assembly with the CLEANING AGENTS (Material No. 11-002). Start at the top.
NOTE : Make sure that the solvent does not go into the components
____ (e.g. the sliding tube). Do not let solvents go on the protective covers or on the electrical wires and the connectors. (e.g. the proximity detectors). You can clean with a sponge, a cloth, a brush or a low-pressure spray-gun.
(4) Dry with compressed air if it is available, or use dry cloths.
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Nose Landing Gear - Basic Materials
Figure 701/TASK 32-21-00-991-001
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R (5) Apply the STORAGE PRESERVATION (Material No. 15-004) evenly to the surfaces you cleaned with a spray-gun or a brush. Prevent runs.
NOTE : Obey the same precautions as for the cleaning procedure with
____ the CLEANING AGENTS (Material No. 11-002).
(6) Lubricate the clean items (Ref. TASK 12-22-32-640-002). Subtask 32-21-00-150-050 R B. Removal of Corrosion on 7010 Aluminum Alloy. (Torque Links, Brace-Strut
R Upper-Arm, Barrel). CAUTION : MAKE SURE THAT THE MATERIALS DO NOT TOUCH THE ASSEMBLY AREAS.
_______
(1)
Treatment of areas with corrosion.
(a)
Clean the areas with corrosion with the CLEANING AGENTS (Material No. 11-002).
(b)
Make sure that the paint is in the correct condition and mark the area with corrosion.
(c)
Remove the paint that is not in the correct condition. Make the edges of the area with corrosion smooth with wet-and-dry emery paper.
(d)
Remove the corrosion with an emery stone. NOTE : The depth of the material removed during the treatment
____ must not change the mechanical strength of the part. If you are not sure, send the part to be repaired.
(e)
Fully degrease with the CLEANING AGENTS (Material No. 11-003).
(2)
Removal of Corrosion-Passivation
(a)
Pickle the surface with corrosion :
-rub it lightly with a piece of cotton wool soaked in a solution of 50% PRETREATMENT FOR PAINTING (Material No. 13-001) and 50% water.
(b)
During the deoxidation, do not let the liquid run. If it is necessary install the protective covers.
(c)
Flush with water and do the protective treatment immediately.
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(a)
Prepare a solution of PRETREATMENT FOR PAINTING (Material No. 13-002) (35 g/liter) (6 oz/US Gal.)
(b)
Apply the solution on the surface with a clean piece of cotton wool.
(c)
Let it stay on the surface for approximately 5 minutes. Apply more solution not less that two times but do not rub.
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