Preliminary Requirements

Safety Requirements

WARNING

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

CAUTION

THE MARK MUST NOT CHANGE THE CONDITION OR THE OPERATION OF THE PART. ONLY THE APPLICABLE IAE PROCEDURE IS TO BE USED TO MAKE MARKS.

Procedure

1. SUBTASK 70-09-01-400-001 Procedures to Make a Temporary Mark

   1. 
      CAUTION
      CHINA CLAY-TYPE PENCILS (FOR EXAMPLE, CHINAGRAPH PENCILS) MUST NOT BE USED.
      GRAPHITE-TYPE PENCILS CAN CAUSE CARBON PENETRATION AT HIGH TEMPERATURES AND MUST NOT BE USED. REMOVE ALL MARKS MADE WITH A GRAPHITE PENCIL BEFORE HEAT TREATMENT OR ASSEMBLY.
      DO NOT USE LEAD OR METALLIC PENCILS OR A PROCEDURE NOT SPECIFIED TO MARK PARTS. PARTICLES OF CARBON, ZINC, COPPER, LEAD, OR A SIMILAR RESIDUE CAN CAUSE A DECREASE IN FATIGUE STRENGTH AS A RESULT OF CARBURIZATION OR INTERGRANULAR ATTACK WHEN THE PART BECOMES HOT. IF A MARKER THAT IS NOT APPROVED IS USED TO MAKE A MARK, THE MARK MUST BE FULLY REMOVED BY THE SPM TASK 70-11-26-300-503.

      During the overhaul and repair checks, it will be necessary to mark temporary marks on some components and assemblies.

      1. Temporary marks are those that identify parts during overhaul (that is, during the usual handling, inspection, and storage of parts before final assembly and use).

      2. Do not use a marking pencil to make a mark on the surfaces of carbon seal plates or the mating surfaces of machined parts. Particles of the material used to make the mark could cause incorrect results during dimensional inspection and assembly.

   2. Marking Methods.

      1. Ink marking.

         1. The symbols are made with an ink as specified in this SUBTASK. This ink does not cause damage to the surface of the part as mechanical methods do.

            NOTE

            Usually, ink stamping and electrolytic etching, when used as a temporary marking method, can be applied to all surfaces which do not move against other surfaces after assembly.

   3. Marking Materials.

      NOTE

      Unless specified differently, it is not necessary to remove the subsequent materials.

      1. This material is used to highlight stamped or vibration peened part numbers during inspection, and is approved to use on all gas turbine engine alloys if you remove the material after the inspection is completed.

         1. Chalk.

            1. CoMat 06-159 CHALK (WHITE).

               1. After inspection, remove this low dust material with the solvent wipe procedure. Refer to the SPM TASK 70-11-26-300-503.

      2. These materials are approved to use on steel, stainless steel, cobalt-base alloys, cobalt-base alloys, aluminum, titanium, and titanium alloys, and on nickel-base alloys that do not include nickel superalloys (for example, IAE 1422 or IAE 1480) unless specified differently in the PCI.

         1. Crayons.

            1. CoMat 06-154 METAL MARKING CRAYON (SOFT).

         2. Dyes, Layout and Identification.

            1. CoMat 02-078 LAYOUT AND IDENTIFICATIONDYE.

            2. CoMat 02-386 LAYOUT AND IDENTIFICATION DYE.

            3. CoMat 02-387 LAYOUT AND IDENTIFICATION DYE.

            4. CoMat 06-162 DYE-LAYOUT AND IDENTIFICATION(BLUE).

         3. Inks (applied by brush or stamp).

            1. CoMat 06-073 INK, METAL MARKING.

            2. CoMat 06-149 STAMPING INK, BLACK.

               NOTE

               This material is also approved to use on nickel superalloys, aluminide, and ceramic coated parts.

            3. CoMat 06-160 INK, MARKING (BLACK).

         4. Lay-out Fluid and Marking Ink.

            1. CoMat 02-123 LAY-OUT FLUID.

               NOTE

               CoMat 02-123 LAY-OUT FLUID is a more permanent material to use on the cool parts of the engine only. For example, use this marker at temperatures less than 536 deg F (280 deg C).

            2. CoMat 02-124 MARKING INK.

         5. Markers

            1. CoMat 02-121 TEMPORARY MARKER PENCIL/CRAYON.

               NOTE

               When the mark is to be made in water (for example, during ultrasonic inspection check), use CoMat 02-121 TEMPORARY MARKER PENCIL/CRAYON.

            2. CoMat 02-364 MARKER PEN - WHITE.

            3. CoMat 02-364 MARKER PEN - WHITE.

            4. CoMat 02-364 MARKER PEN - WHITE.

            5. 

               CAUTION

               CoMat 06-153 FELT TIP MARKER, RAPID DRYING IS DIFFICULT TO REMOVE FROM ALUMINUM ALLOYS. THUS, DO NOT USE THIS MARKER FOR TEMPORARY INSPECTION OR IN-PROCESS MARKING ON ANODIZED OR FINISHED SURFACES OF ALUMINUM ALLOY GAS TURBINE ENGINE PARTS WHEN REMOVAL OF THE MARK WILL OCCUR LATER.

               CoMat 06-153 FELT TIP MARKER, RAPID DRYING.

               NOTE

               Refer to the PCI for the different types of base materials and coatings on which the CoMat 06-153 FELT TIP MARKER, RAPID DRYING and its many suffixes can be applied.

            6. CoMat 06-158 MARKER, EXTRA FINE POINT(BLACK).

            7. CoMat 06-172 MARKER, HIGH PURITY (BLUE).

            8. CoMat 06-173 MARKER, HIGH TEMPERATURE(BLUE).

            9. CoMat 06-174 MARKER, HIGH PURITY, BLACK,TRACE ELEMENT CERTIFIED (TEC).

            10. CoMat 06-175 MARKER, HIGH TEMPERATURE(BLUE).

         6. Pencils.

            1. CoMat 06-120 METAL MARKING PENCIL (HARD).

         7. Pens.

            1. CoMat 02-363 MARKING PEN.

               NOTE

               This trace element certified pen is now CoMat 06-153 FELT TIP MARKER, RAPID DRYING. It is permitted to use remaining supplies.

            2. CoMat 02-366 MARKING PEN (PAINT) -WHITE OR YELLOW.