Preliminary Requirements

Procedure

1. SUBTASK 72-32-87-110-054 Prepare the Panel Liner for Repair

   1. Mask all the surface that is not to be repaired.

      1. Use CoMat 02-005 ADHESIVE TAPE (MASKING).

   2. Clean the area that is to be repaired.

      1. Use CoMat 01-124 ISOPROPYL ALCOHOL and CoMat 02-099 LINT-FREE CLOTH.

         1. Refer to the SPM TASK 70-11-26-300-503.

   3. Lightly make rough the area that is to be repaired.

      1. Use CoMat 05-016 GARNET PAPER, 80-GRIT or 05-017 garnet paper.

   4. Clean the surface by air blast to remove residual.

   5. Repeat Step.

2. SUBTASK 72-32-87-380-051 Apply Epoxy Resin to the Damaged Area

   1. Refer to Figure, Figure, Figure and Figure.

   2. 
      WARNING
      DURING THE OPERATION, WEAR PROTECTIVE GLOVES AND GOGGLES.
      
      WARNING
      MAKE SURE THERE IS SUFFICIENT VENTILATION DURING THE OPERATION.

      Make up the epoxy resin from the two parts.

      1. Use CoMat 08-015 RESIN and CoMat 08-016 HARDENER.

         1. Refer to the SPM TASK 70-36-02-360-501, SUBTASK 70-36-02-360-021.

   3. Apply the epoxy resin and fiberglass cloth to the damaged area. Do Step to Step.

      1. Use CoMat 08-049 FIBREGLASS CLOTH.

      2. Apply the coat of the resin to the area lightly.

      3. Cover the fiberglass cloth soaked with epoxy resin on the area

         1. Use a roller or equivalent to remove any wrinkles and/or bumps, and make surface smooth

      4. Apply the epoxy resin.

      5. NOTE

         It is recommended to use one fiberglass cloth for approximately every 0.0059 in (0.15 mm) in depth.

         NOTE

         When there are local deep erosion areas on the repaired area, fill the areas with the mixture of epoxy resin and fiberglass cloth which is cut into fine strips.

         Repeat Step through Step to repair erosion.

   4. Remove excess resin by spatula or equivalent.

3. SUBTASK 72-32-87-380-052 Cure the Repaired Area

   1. Refer to Figure and Figure.

   2. 

      CAUTION

      BEFORE CURING, LET THE AIR OUT OF THE RESIN LAYER BY ROLLER OR EQUIVALENT.

      

      CAUTION

      BE CAREFUL THAT RESIN ON THE LINER IS NOT DEFORMED DURING CURING PROCESS.

      Cure the coating of epoxy resin for 60 minutes at 194 to 212 deg F (90 to 100 deg C) by heating.

   3. Remove excess resin to make surface smooth.

      1. Use CoMat 05-016 GARNET PAPER, 80-GRIT or 05-017 Garnet paper.

   4. Dimensionally examine the panel before applying epoxy primer and epoxy finish.

4. SUBTASK 72-32-87-380-053 Make up the Epoxy Primer

   1. Mix the primer base and the catalyst.

      1. NOTE

         If necessary, the CoMat 07-082 THINNER can be added. Up to 10 percent by volume.

         NOTE

         The mixture must be allowed to stand for 30 minutes before it is used.

         NOTE

         The pot life of the mixture is eight hours. If you do not use the mixture within eight hours, discard it.

         Use CoMat 07-080 TWO-PACK EPOXY PRIMER AND CATALYST and CoMat 07-081 EPOXY PRIMER CATALYST in equal parts.

5. SUBTASK 72-32-87-380-054 Apply the Epoxy Primer to the Repaired Areas

   1. Refer to Figure and Figure

   2. Apply the mixed epoxy primer to the epoxy resin coat.

      1. Use a brush or spray to get the minimum thickness necessary.

   3. Cure the coating for 5 to 17 hours at room temperature.

6. SUBTASK 72-32-87-380-055 Make up the Polyurethane Paint

   1. NOTE

      If necessary, the CoMat 07-082 THINNER can be added. Up to 10 percent by volume.

      NOTE

      The mixture must be allowed to stand for 30 minutes before it is used.

      NOTE

      The pot life of the mixture is eight hours. If you do not use the mixture within eight hours, discard it.

      Mix the primer base and the catalyst.

      1. Use CoMat 07-153 POLYURETHANE PAINT GLOSSBLACK and CoMat 07-154 POLYURETHANE PAINT CATALYSTX-501 in equal parts.

7. SUBTASK 72-32-87-380-056 Apply the Urethane Paint to the repaired Area

   1. Refer to Figure and Figure.

   2. Apply the mixed Urethane paint to the area to be coated.

      1. Use a brush or spray to get minimum thickness necessary.

   3. Cure the coating for 12 hours minimum at room temperature.

8. SUBTASK 72-32-87-220-069 Examine the Panel Liner

   1. Refer to Figure and Figure.

   2. Visually examine the panel.

      1. Visually examine the repaired area.

         1. Nicks, dents, scratches, delamination or other damages are not permitted.

         2. Refer to TASK 72-32-87-200-000 (INSPECTION-000).

   3. Dimensionally examine the panel.

9. SUBTASK 72-32-87-350-056 Mark Repair Number on Panel Liner

   1. Make a mark VRS 1804 with permanent ink adjacent to the part number.

      1. Use the ink method.

         1. Refer to the SPM TASK 70-09-00-400-501.

Figure: Repairable limit - Assembly A

Repairable limit - Assembly A



Figure: In process dimension before painting Polyurethane paint - Assembly A

In process dimension before painting Polyurethane paint - Assembly A



Figure: Detail dimension - Assembly A

Detail dimension - Assembly A



Figure: Repairable limit - Assembly B

Repairable limit - Assembly B



Figure: In process dimension before painting Polyurethane paint - Assembly B

In process dimension before painting Polyurethane paint - Assembly B



Figure: Detail dimension - Assembly B

Detail dimension - Assembly B