Technical data

13773-001
20-30
Page 530 Nov 2000
(2) Preliminary Cleaning
WARNING:
If fuel tank interior is to be cleaned, ground aircraft to suitable earth-
ground. Evacuate oxygen from fuel tank by filling tank with an inert
gas such as nitrogen or argon. Gas should be applied continuously
until tank is clean and dry. Laminates that come in contact with mois-
ture must be dried before performing composite repairs.
(a) Remove excess material (chips, shavings, lint, etc.) using a vacuum sweeper, clean bristle
brush, etc.
WARNING:
Cleaning solvents are toxic and flammable. Skin protection and eye
protection are required. Additionally, adequate ventilation and/or fresh
air masks shall be used in all closed areas.
CAUTION: Isoproply alcohol is the only cleaning agent recommended when preparing
composite surfaces (excluding fuel compartments) for repair. When clean-
ing a composite surface in any of the fuel compartments, acetone is the rec-
ommended cleaning agent.
(b) Clean area with a clean cloth dampened with Isoproply alcohol and immediately wipe area
dry with a clean dry cloth. Do not allow solvent to air dry as a residue will remain on the
surface.
(3) Final Cleaning
Note: Final cleaning must be accomplished prior to applying adhesive, resin, or sealant.
All surfaces shall be thoroughly cleaned and dried before application of any adhe-
sive, resin, or sealant. When handling cleaned surfaces, wear clean white cotton
gloves to prevent surface contamination. Surfaces shall be recleaned in the event
of contamination.
(a) Absorb all visible moisture on the laminate using a clean, lint-free, cotton cloth.
(b) Fold clean lint-free cloths in such a manner as to eliminate raw edges to reduce the possi-
bility of lint contaminating the surface to be cleaned.
WARNING:
Cleaning solvents are toxic and flammable. Skin protection and eye
protection are required. Additionally, adequate ventilation and/or fresh
air masks shall be used in all closed areas.
(c) Wipe effected area with Isoproply alcohol using a clean, lint-free, cotton cloth.
(d) Dampen one cloth with Isoproply alcohol. The cloth should not be saturated to a point
where solvent drips.
CAUTION: Extreme care is needed to clean hard to reach areas, corners, gaps, etc. A
small paint brush, pipe cleaners, or cloth wrapped around wooden or phe-
nolic tools may be used for slots, recesses, and other hard to reach areas.
Do not allow cleaning solvent to air dry as a residue will remain on the sur-
face, contaminating a following process.