Preliminary Requirements

Procedure

1. SUBTASK 72-42-50-350-068 Remove the Inner Seal Carrier

   1. Remove the inner seal carrier.

   2. Refer to Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

2. SUBTASK 72-42-50-320-001 Turn the HPC Rear Static Seal

   1. Refer to Figure.

   2. Machine the spigot diameter to remove all damage to the limit shown in Figure.

      1. Machine only the minimum quantity of material to remove scores or coating. Break sharp edges 0.003 in. - 0.015 in. (0.077 mm - 0.381 mm).

      2. If a metal spray layer has been applied before, make sure all metal spray is removed.

3. SUBTASK 72-42-50-110-061 Clean the HPC Rear Static Seal

   1. Chemically clean the HPC Rear Static Seal.

      1. Refer to the SPM TASK 70-11-03-300-503.

4. SUBTASK 72-42-50-230-075 Do a Crack Test

   1. Do a penetrant crack test of the repair area.

      1. Refer to the SPM TASK 70-23-03-230-501 or TASK 70-23-08-230-501.

      2. No cracks are permitted.

5. SUBTASK 72-42-50-220-086 Examine the HPC Rear Static Seal

   1. Refer to Figure.

   2. Measure the dimension of the spigot diameter.

6. SUBTASK 72-42-50-340-001 Prepare the Part for Coat

   1. Refer to Figure.

   2. Refer to the SPM TASK 70-34-18-380-501.

      1. Excessive abrasive blast can cause deterioration of the prepared surface condition and must be prevented.

      2. Grit blast out of the repair area shown is not permitted. Use masks or maskants.

7. SUBTASK 72-42-50-340-055 Metal Spray the Spigot Diameter

   1. Refer to Figure.

   2. Apply metal spray.

      1. Refer to the SPM TASK 70-34-01-340-501, SUBTASK 70-34-01-340-025.

      2. Use CoMat 03-038 METAL SPRAYING POWDER NICKEL ALUMINIUM (95/5).

      3. Apply sufficient metal spray to obtain sufficient coating thickness when final machined, refer to Step.

      4. Coat out of the repair area is not permitted. Use masks or maskants.

   3. Remove masks or maskants masking tape. Refer to the SPM TASK 70-34-18-380-501.

8. SUBTASK 72-42-50-320-002 Finish the HPC Rear Static Seal

   1. Refer to Figure.

   2. Finish the spigot diameter to the limit shown in Figure.

      1. Make sure that the coating thickness is within the requirements. Refer to the SPM TASK 70-34-01-340-501, except minimum coating thickness waived at fillets and break edges within coated areas.

9. SUBTASK 72-42-50-110-062 Clean the HPC Rear Static Seal

   1. Chemically clean the HPC Rear Static Seal.

   2. Refer to the SPM TASK 70-11-03-300-503.

10. SUBTASK 72-42-50-220-089 Examine the HPC Rear Static Seal

    1. Refer to Figure.

    2. Visually examine and measure the dimensions.

       1. Examine the coating. Refer to the SPM TASK 70-34-01-340-501.

11. SUBTASK 72-42-50-350-080 Identify the Repair

    1. Vibro-engrave VRS9493 adjacent to the part number.

    2. Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-90-00-400-001.

12. SUBTASK 72-42-50-420-001 Install the Inner Seal Carrier

    1. Install the inner seal carrier.

    2. Refer to Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

Figure: Repair Details and Dimensions

Repair Details and Dimensions



Repair Details and Dimensions



Repair Details and Dimensions



Legend

1

Repair Details and Dimensions 1) Vibro-Engrave The Area Shown. See The Text. 2) 0.052 in. - 0.068 in. (1.321 mm - 1.727 mm) 3) 0.035 in. - 0.051 in. (0.889 mm - 1.295 mm), Modified Radius. 4) 0.085 in. (2.159 mm), Minimum Wall Thickness. 5) 16.8874 in. (428.940 mm), Minimum, Diameter Before Coat. 6) Grit Blast Not Permitted In The Area Shown. Mask By The Text. 7) Grit Blast The Repair Area Shown. See The Text. 8) Metal Spray Coating Not Permitted In The Area Shown. Mask By The Text. 9) Repair Area. Apply Metal Spray Coating To The Area Shown. See The Text. 10) 0.197 in. (5.004 mm), Minimum 11) 0.035 in. - 0.051 in. (0.889 mm - 1.295 mm), Radius, Reference 12) 16.9039 in. - 16.9085 in. (429.3591 mm - 429.4759 mm), Finish Diameter All Dimensions Apply When Surface A Is Flat Within 0.001 in. (0.026 mm) And Diameter Of Datum Axis B Has A Clearance Envelope Of 16.9085 in. (429.4759 mm) Diameter In A Constrained State. Constraint Contact Allowed Only On Surface A, Face AH And Diameter B.

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