Preliminary Requirements

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE CONSUMABLE MATERIAL MANUFACTURER'S SAFETY DATA SHEETS FOR CONSUMABLE MATERIAL SAFETY INFORMATION (SUCH AS HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE HAZARD DATA, EXPLOSION HAZARD DATA, REACTIVITY HAZARD DATA, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, USE AND CONTROL MEASURES), AND ALSO TO TAKE LOCAL REGULATIONS INTO CONSIDERATION.

Procedure

1. SUBTASK 70-23-05-230-001 Control of Equipment and Materials

   1. Refer to SPM TASK 70-23-00-230-501.

2. SUBTASK 70-23-05-230-002 The Procedure for Local Applications of Fluorescent Penetrant Inspection

   1. NOTE

      Part must be cleaned as specified in the Engine Manual. If the Engine Manual does not specify a cleaning procedure, it is necessary to clean the area to be inspected as follows:

      Clean the area to be inspected.

      1. Clean the area to be inspected with clean paper tissues or a clean lint-free cloth and a solvent from SPM TASK 70-11-26-300-503. Do not let the solvent run over or flood any surface.

      2. Permit the solvent to drain or evaporate fully. If necessary, wipe carefully with a clean cloth or tissue paper to remove the excess solvent.

   2. Apply the penetrant.

      1. Make sure the part is dry and free from contamination or surface coating that will decrease the defect indications.

         1. To get the best results from the penetrant inspection procedure, the part must be fully cleaned.

         2. Surface contamination will cause the penetrant to stay on the surface, which will give incorrect indications.

         3. Contamination in the defect will limit or stop the entry of the penetrant, which will decrease the defect indications.

         4. The part surface temperature must be 40 °F - 125 °F (4 °C - 52 °C).

      2. Mask the adjacent areas with masking tape as necessary to keep penetrant away from areas where penetrant is unwanted.

      3. Apply, by brush or spray, penetrant of the specified sensitivity to the area to be inspected. This step must be done in Ultra-Violet Light (UV light) to ensure correct coverage of area to be inspected. Do not mix different types or brands of penetrant. Refer to Table for the applicable penetrants:

         NOTE

         It is not permitted to mix the selected CoMat letter suffix penetrant material with other CoMat letter suffix penetrant materials.

         Table 2. Applicable Penetrants For Specified Sensitivity

         Specified Sensitivity	Applicable Penetrants
         Normal/Medium	CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY) CoMat 06-064 FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY)
         High	CoMat 06-018 FLUORESCENT PENETRANT (POST-EMULSIFIED HIGH SENSITIVITY) CoMat 06-065 FLUORESCENT PENETRANT (WATER WASHABLE HIGH SENSITIVITY)
         Ultra-High	CoMat 06-022 FLUORESCENT PENETRANT (POST-EMULSIFIED ULTRA HIGH SENSITIVITY)

      4. Drain/dwell for 20 - 60 minutes.

   3. Remove unwanted penetrant.

      1. NOTE

         The area must be cleaned to the point where only the surface penetrant is removed. The solvent must not run over or flood any surface. It is permitted to do this step in Ultra-Violet Light (UVL).

         Remove unwanted penetrant with a cloth or paper towel made moist with a solvent from SPM TASK 70-11-26-300-503.

      2. Examine the inspection surface in UV light for full removal of surface penetrant.

   4. Apply one of the developers as follows:

      1. Apply CoMat 06-032 DRY DEVELOPER by a blow dispenser or by dusting, and permit the developer absorb the penetrant for 10 minutes minimum.

      2. Apply CoMat 06-030 NON AQUEOUS DEVELOPER by spray to get a developer layer of approximately equal thickness that is sufficient to see the developer layer on the part surface but not sufficient to fully obscure the color of the part. Let the developer absorb the penetrant for 10 minutes to 2 hours.

   5. Inspect the part.

      1. NOTE

         Parts must be inspected within 2 hours after you apply the developer. If more than 2 hours has passed, the parts must be cleaned and the penetrant must be re-applied.

         During inspection, it is not permitted to use eyeglasses that have lenses that darken in UV light.

      2. Visually inspect the area after the necessary development time in UV light. Mark the location of indications by a suitable procedure.

      3. Do the subsequent procedure on all areas that show a moderate fluorescent background, and on all questionable or marginally unacceptable areas:

         1. Lightly rub the area with a soft brush or cotton swab that is moist with a solvent from SPM TASK 70-11-26-300-503. Do not use too much solvent on the area.

         2. Let the solvent on the surface dry, and then examine area again in UV light.

         3. If the indication shows again immediately, then the indication is a result of a discontinuity. If you cannot easily see the initial mark around the indication, apply a new mark around the indication.

         4. If the indication does not show again immediately, do the subsequent procedure:

            1. Apply CoMat 06-030 NON AQUEOUS DEVELOPER by spray to the area to get a developer layer of approximately equal thickness that is sufficient to see the developer layer on the part surface but not sufficient to fully obscure the color of the part.

            2. Examine the area again in UV light.

               1. If the indication shows again in three minutes or less after you applied the non-aqueous developer, then the indication is a result of a discontinuity. If you cannot easily see the initial mark around the indication, apply a new mark around the indication.

               2. If the indication does not show again in three minutes or less after you applied the non-aqueous developer, do an inspection of the area with 3X - 10X magnification in white light for the cause of the initial indication.

               3. If the inspection with 3X - 10X magnification in white light finds a discontinuity that caused the initial indication, and you cannot easily see the initial mark around or adjacent to the indication, apply a new mark around or adjacent to the indication.

               4. If the inspection with 3X - 10X magnification in white light does not find a cause for the initial indication, then it is permitted to ignore the initial indication, and to remove the mark around or adjacent to the indication.

               5. Use SPM TASK 70-11-26-300-503

      4. NOTE

         Some defects seen by penetrant with UV light cannot be seen with white light; if this occurs, it is necessary to get relevant assistance.

         Examine each marked indication at 3X to 10X magnification in white light to identify the type of discontinuity.

         1. Cracks are not permitted, unless specified differently in the Engine Manual.

      5. NOTE

         Removal of developer is necessary only, if it interferes with subsequent processing or part function.

         Remove the remaining developer.

         1. If the part has no areas of entrapment and will go to visual/dimensional inspection or engine assembly, blow off any remaining developer with a blast of clean, dry compressed air, if necessary.

         2. If the part has areas in which dry developer can get caught, flush with hot water to clean.

         3. If you use a non-aqueous developer, remove the developer by SPM TASK 70-11-26-300-503 solvent wipe.

      6. If necessary to prevent rust or corrosion, apply corrosion inhibitor by SPM TASK 70-38-05-380-501.