Leak Sealing; Resealing After Complete Skin Removal - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
Refer to and adhere to all measures and precautions
obtained from the applicable Material Safety Data Sheet
(MSDS) prior to using or removing CS 3204 and any other
chemicals,
cleaners, or solvents listed in this manual.
Determine the approximate location of the leak by visual inspection through the cover
plates in the lower surface of the wing. After leak area is determined, drain all fuel from
affected tank. See Section II for defueling procedures.
A. Remove the cover plates on upper surface of wing to repair the tank leak. Sealing
can be accomplished through these openings.
Assure that the leak is not being caused by structural cracks,
loose seams or any source other than a pinhole from around
a properly installed fastener.
B. Clean the general area of the leak with clean paper towels. Apply an even coating
of CS 3204 A2 with a stiff clean brush. Catalyst is furnished and should be
carefully mixed according to instructions on the container.
C. Allow the sealer to dry overnight.
D. After drying, the sealer should be checked for air bubbles or thin spots. Additional
sealer should be applied where necessary.
E. Reinstall the cover plates on wing upper surface.

RESEALING AFTER COMPLETE SKIN REMOVAL

To reseal the fuel tanks after removing or repairing the wing skin, proceed as follows:
A. Prior to installing the wing tank skin, all surfaces that will receive sealant shall be
cleaned and etched.
B. Apply CS 3204 B2 mixed compound to all areas of contact between the skin and
rib structure.
C. Rivet the wing tank skin in place and allow the sealer to dry until tacky to the touch.
D. After adequate drying, the sealer should be checked for air bubbles or thin spots.
Apply additional CS 3204 A2 sealer as necessary.
E. Reseal cover plates and fuel quantity transmitter mounting with CS 3204 B2.
F. Vacuum tank area thoroughly to remove all particles of dried sealant, dirt or other
foreign matter.
Effective: 5/05/04
AIRCRAFT MAINTENANCE MANUAL
***WARNING***
adhesives, materials,

LEAK SEALING

**CAUTION**
oils, fuels, sealers,
5-9