GENX-1B - CLEANING,INSPECTION,AND REPAIR MANUAL

	GENX-1B CLEANING,INSPECTION,AND REPAIR MANUAL	Dated: 06/11/2021
	CIR 72-22-43 , REPAIR 002
	FLOWPATH SPACER - REPAIR - POLY PASTE REPAIR

* * * FOR ALL

TASK 72-22-43-300-802

1 .

Poly Paste Repair.

This procedure gives instructions to repair the flowpath spacer by removing damage and applying polyurethane paste adhesive to the eroded areas of area F. Refer to Figure 901.

The following maximum repairable limits apply to this repair:

NOTE:

The information below gives maximum repairable limits for the applicable Inspection sections. The paragraphs are numbered the same as the manual Inspection sections.

NOTE:

For 72-00-02, Inspection 001. Refer to TASK 72-00-02-200-801 (72-00-02, INSPECTION 001) .

(4)

Visual Inspection.

(g).A.

Do an inspection of area F of the flowpath spacers (01-060 , 72-22-00) (SIN 830AM). Refer to Figure 818.

Erosion in the glass fiber erosion layer or carbon fiber layer:

Maximum repairable limit:

Refer to Figure 901 for repairable limits.

Gouges, cuts, or scratches in the glass fiber erosion layer:

Maximum repairable limit:

Refer to Figure 901 for repairable limits.

NOTE:

For 72-00-22, Inspection 001. Refer to TASK 72-00-22-200-801 (72-00-22, INSPECTION 001) .

(3)

Visual Inspection.

(t)

Do an inspection of area F of the flowpath spacers (01-060 , 72-22-00) (SIN 830AM). Refer to Figure 806.

Erosion in the glass fiber erosion layer or carbon fiber layer:

Maximum repairable limit:

Refer to Figure 901 for repairable limits.

Gouges, cuts, or scratches in the glass fiber erosion layer:

Maximum repairable limit:

Refer to Figure 901 for repairable limits.

NOTE:

For 72-22-43, Inspection 001. Refer to TASK 72-22-43-200-801 (72-22-43, INSPECTION 001) .

(4)

Visual Inspection.

(g)

Do an inspection of area F of the flowpath spacers (01-060 , 72-22-00) (SIN 830AM). Refer to Figure 802.

Erosion in the glass fiber erosion layer or carbon fiber layer:

Maximum repairable limit:

Refer to Figure 901 for repairable limits.

Gouges, cuts, or scratches in the glass fiber erosion layer:

Maximum repairable limit:

Refer to Figure 901 for repairable limits.

The subsequent table gives a list of the part numbers that are applicable to this procedure. All part numbers are applicable to all paragraphs unless specified differently.

Part Number(s)

2453M82G01

2453M82G02

Proprietary/Complex Process Statement.

(1)

None.

2 .

Tools, Equipment, and Materials.

NOTE:

Repair sources can use equivalent alternatives for tools, equipment, and consumable materials, however, the repair source must demonstrate and document equivalency.

Tools and Equipment.

(1)

Special Tools. None.

(2)

Standard Tools and Equipment.

Description

Manufacturer

3M EPX Plus II Applicator (3M ID No. 62-9170-9930-1) (applicator)

Local Purchase

12 Mixing Nozzles (3M ID No. 62- 9171-9153-8) (mixing nozzle)

Local Purchase

Eyedropper

Local Purchase

Syringe

Local Purchase

Thermocouples

Local Purchase

(3)

Locally Manufactured Tools.

Figure

Description

904

Teflon Spatula

Consumable Materials.

Code No.

Description

C04-003

Solvent, General (acetone)

C04-035

Solvent, General (isopropyl alcohol)

C06-067

Weld Repair Paste (polyurethane paste adhesive)

C10-040

Tape, Teflon

C10-133

Film, polymer FEP, Un-perforated, 0.001 in. (0.03 mm) thick (release film)

C10-139

Gloves, White Cotton Disposable, Lint Free (gloves)

C10-141

Abrasive Paper (120-180 grit abrasive paper)

C10-182

Cloth, Cleaning for Aircraft Structural (SAE-AMS 3819, BMS 15-5) (cloth)

Referenced Procedures.

ATA No.

Description

70-46-01

Masking and Cleaning of Epoxy and Polyester Matrix Thermosetting Composite Materials

72-00-02

Inspection 001

72-00-22

Inspection 001

72-22-43

Inspection 001

SAE ARP 5144, Heat Application for Thermosetting Resin Curing

Expendable Parts. None.

SPD Information.

(1)

Spares Supplied. None.

(2)

Protected Spares. None.

(3)

Locally Manufactured Spares. None.

Special Solutions. None.

Test Specimens. None.

3 .

Dimensional Information.

Subtask 72-22-43-220-048

Refer to Figure 901 for specified dimensions and locations.

NOTE:

The dimensional data identified within this procedure was designed using inches as the base unit of measurement for dimensional values. The conversion to millimeters is rounded to one less decimal digit than inches. For minimum dimensions converted values are rounded up. For maximum dimensions, converted values are rounded down. To avoid conversion errors, do not re-convert from millimeters to inches.

NOTE:

Reference dimensions do not require inspection.

4 .

Setup Information.

None.

5 .

Procedure.

Subtask 72-22-43-350-005

NOTE:

This repair can be done while the flowpath spacer is installed on the fan booster module.

If you do this repair with the flowpath spacer installed on the fan booster module, do as follows:

(1)

Remove the fan blade and adjacent fan platforms to get access to the repair area.

Subtask 72-22-43-350-006

Apply masking to the areas of the flowpath spacer that you will not repair. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS), Figure 901, and as follows:

(1)

Use Composite Masking Method 3.

(2)

Apply masking to all the hardware adjacent to the flowpath spacer to give them protection from sanding unwanted material, spills, and drips.

(3)

Make sure that you give protection to the fan booster inlet, fan booster spool, and fan disk.

Subtask 72-22-43-220-049

Do an inspection of the flowpath spacer. Refer to Figure 901 and as follows:

(1)

If the damage extends more than the limits specified in Figure 901, then you cannot repair the flowpath spacer with this procedure.

Subtask 72-22-43-220-050

(2)

Do an inspection of the flowpath spacer for polyurethane paste adhesive applied before on each repair area. Refer to TASK 72-22-43-200-801 (72-22-43, INSPECTION 001), Figure 901, and as follows:

NOTE:

C06-067 polyurethane paste adhesive cannot be applied on top of the polyurethane paste applied before.

NOTE:

Polyurethane paste adhesive applied before in adjacent areas that are not part of the current repair area must not be removed.

(a)

If polyurethane paste adhesive was applied before, remove the polyurethane paste adhesive in the repair area as follows:

Apply masking to the flowpath spacer that will not repair. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS) and as follows:

Use Composite Masking Method 3.

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

CAUTION:

DO NOT LET ACETONE GO INTO THE PAINT OR FLOWPATH SPACER REPAIR AREAS WITH POLYURETHANE PASTE ADHESIVE. IT CAN MAKE THE PAINT OR THE POLYURETHANE PASTE ADHESIVE SOFT OR DETERIORATE THEM.

Use a clean C10-182 cloth moist with C04-003 acetone to make the polyurethane paste adhesive soft.

WARNING:

DO NOT BREATHE THE PARTICLES WHEN SANDING. THE PARTICLES CAN CAUSE DAMAGE, INJURY, OR IRRITATION TO YOU. USE PERSONAL PROTECTION EQUIPMENT. USE LOCAL MECHANICAL EXHAUST VENTILATION OR AN APPROVED RESPIRATOR.

Use C10-141 120-180 grit abrasive paper to sand the polyurethane paste adhesive.

Do not remove the carbon fiber without damage.

Do paragraph 5.C.(2)(a) again until you fully remove the polyurethane paste adhesive applied before.

NOTE:

Multiple applications of C04-003 acetone can be necessary to remove the polyurethane paste adhesive.

Subtask 72-22-43-220-051

(3)

Do an inspection of the flowpath spacer to identify repair areas with missing or eroded paint, primer, fiberglass, or carbon fiber damage. Refer to Figure 901 and as follows:

(a)

Eroded carbon fiber in area B must not be damaged more than 0.030 inch (0.76 mm) in depth, below the painted surface of the flowpath spacer.

(b)

Erosion damage in area C and area D must not extend through the fiberglass layer.

(c)

Damage more than the limits is not repairable with this procedure.

Subtask 72-22-43-350-007

Prepare the flowpath spacer repair areas as follows:

WARNING:

CAUTION:

MAKE SURE THAT YOU DO NOT SAND INTO THE FIBERGLASS OR CARBON FIBER COMPOSITE AREA OF THE FLOWPATH SPACER. DAMAGE TO THE FLOWPATH SPACER CAN OCCUR.

(1)

Use C10-141 120-180 grit abrasive paper to lightly sand the flowpath spacer repair area as follows:

(a)

Remove the paint and the primer from the repair area, but do not remove erosion damage.

(b)

Remove loose fiberglass and carbon fibers.

(c)

Do not remove the fiberglass or carbon fibers without damage. Only make rough the exposed carbon fiber.

(d)

Do not increase the depth of the repair area.

(e)

The repair area in area B must have a width of 1.40-1.50 inches (35.6-38.1 mm) and must be centered circumferentially on the erosion area. Refer to Figure 902.

(f)

Do not increase the size of the repair area in area B, area C, or area D.

(g)

Use a clean C10-182 cloth moist with water to clean the flowpath spacer surface to keep it cool. You must not see steam on the surface that you clean.

Subtask 72-22-43-220-052

Do an inspection of the exposed carbon fiber on the flowpath spacer for damage after sanding. Refer to Figure 901, Figure 902, Figure 905, and as follows:

(1)

Carbon fiber damage in area B must not be more than 0.030 inch (0.76 mm) in depth, below the painted surface of the flowpath spacer repair area.

(2)

Exposed carbon fiber in area C and area D is not permitted.

Subtask 72-22-43-110-011

Clean the flowpath spacer repair area. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS) and as follows:

NOTE:

This step is necessary to remove dirt and unwanted material from sanding and prepare the repair area for masking.

(1)

Use C10-139 gloves to touch the flowpath spacer.

WARNING:

REFER TO THE PRODUCT LABEL AND MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF CONSUMABLE PRODUCTS.

CAUTION:

DO NOT LET ACETONE GO INTO THE PAINT OR FLOWPATH SPACER REPAIR AREAS WITH POLYURETHANE PASTE ADHESIVE. IT CAN MAKE THE PAINT OR THE POLYURETHANE PASTE ADHESIVE SOFT OR DETERIORATE THEM.

(2)

Use Composite Cleaning Method 4 or Composite Cleaning Method 5, and as follows:

NOTE:

It is recommended to use C04-035 isopropyl alcohol as an alternative to C04-003 acetone to decrease the risk of damage to the flowpath spacer that can be caused by C04-003 acetone.

Subtask 72-22-43-160-006

(a)

Alternative Procedure Available. Use C04-035 isopropyl alcohol.

Subtask 72-22-43-160-007

(a).A.

Alternative Procedure. Use C04-003 acetone and as follows:

Apply masking to the repair area as follows:

Use Composite Masking Method 5.

Use small quantities of C04-003 acetone to prevent damage of the adjacent areas.

Do not let the C04-003 acetone stay on the repair area surface more than 10 seconds.

Subtask 72-22-43-220-053

Do an inspection of the adjacent repair area as follows:

Use C10-139 gloves to touch the flowpath spacer.

Remove the masking from the repair area.

Do an inspection of the repair areas with polyurethane paste adhesive applied before for damaged or soft areas as follows:

(1)

Do Subtask 72-22-43-220-050 (paragraph 5.C.(2)(a)) again to remove the damaged or soft areas of polyurethane paste adhesive.

Subtask 72-22-43-350-008

Apply masking around the flowpath spacer repair area. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS) and as follows:

(1)

Use C10-139 gloves to touch the flowpath spacer.

(2)

Remove all the masking that you applied before in the repair area.

(3)

Use Composite Masking Method 5.

Subtask 72-22-43-160-008

Clean the flowpath spacer repair area. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS) and as follows:

NOTE:

This step is necessary to prepare the repair area for bonding after the masking is applied.

(1)

Use C10-139 gloves to touch the flowpath spacer.

WARNING:

REFER TO THE PRODUCT LABEL AND MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF CONSUMABLE PRODUCTS.

CAUTION:

DO NOT LET ACETONE GO INTO THE PAINT OR FLOWPATH SPACER REPAIR AREAS WITH POLYURETHANE PASTE ADHESIVE. IT CAN MAKE THE PAINT OR THE POLYURETHANE PASTE ADHESIVE SOFT OR DETERIORATE THEM.

(2)

Use Composite Cleaning Method 4 or Composite Cleaning Method 5 and as follows:

NOTE:

It is recommended to use C04-035 isopropyl alcohol as an alternative to C04-003 acetone to decrease the risk of damage to the flowpath spacer that can be caused by C04-003 acetone.

Subtask 72-22-43-160-009

(a)

Alternative Procedure Available. Use C04-035 isopropyl alcohol.

Subtask 72-22-43-160-010

CAUTION:

MAKE SURE THAT ALL SYRINGE OR EYEDROPPER COMPONENTS ARE COMPATIBLE WITH ACETONE AND WILL NOT DEGRADE FROM EXPOSURE TO IT. IT CAN CONTAMINATE THE FLOWPATH SPACER REPAIR SURFACE AND PREVENT THAT THE C06-067 POLYURETHANE PASTE ADHESIVE BONDS.

(a).A.

Alternative procedure. Use C04-003 acetone and as follows:

Use a clean syringe or a clean eyedropper.

Flush the syringe or eyedropper with C04-003 acetone before you use it.

Use the syringe or eyedropper to apply small quantities of C04-003 acetone to prevent damage of the adjacent areas.

Do not let the C04-003 acetone stay on the repair area more than 10 seconds.

Subtask 72-22-43-350-009

Do a water break test to the flowpath spacer repair area. Refer to TASK 70-46-01-350-030 (MASKING AND CLEANING OF EPOXY AND POLYESTER MATRIX THERMOSETTING COMPOSITE MATERIALS) and as follows:

(1)

Dry the flowpath spacer in air for 30 minutes minimum after the test.

Subtask 72-22-43-350-010

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER'S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

Alternative Procedure Available. Prepare the C06-067 polyurethane paste adhesive as follows:

(1)

Put the C06-067 polyurethane paste adhesive cartridge into the applicator.

(2)

Remove the cap from the end of the cartridge and attach the mixing nozzle to the end of the cartridge.

(3)

Start to squeeze the trigger on the applicator to let the C06-067 polyurethane paste adhesive flow into the mixing nozzle.

(4)

Continue to squeeze the trigger on the applicator until the C06-067 polyurethane paste adhesive starts to come out of the end of the mixing nozzle.

(5)

Squeeze-out a minimum of filled diameter of 1.0 inch (26 mm) by 0.05 inch (1.3 mm) in thickness of C06-067 polyurethane paste adhesive from the applicator and discard it before you use the C06-067 polyurethane paste adhesive on the flowpath spacer repair area.

(6)

After you complete the repair, remove and discard the mixing nozzle and replace the cap on the cartridge.

NOTE:

The shelf life of the cartridge is two weeks after it is opened. Each new repair will have to use a new mixing nozzle.

Subtask 72-22-43-350-011

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER'S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

J.A.

Alternative Procedure. Prepare the C06-067 polyurethane paste adhesive as follows:

(1)

Put C06-067 polyurethane paste adhesive the cartridge into the applicator.

(2)

Remove the cap from the end of the cartridge.

(3)

Start to squeeze the trigger on the applicator to let the C06-067 polyurethane paste adhesive flow onto the clean surface/container.

(4)

Mix the C06-067 polyurethane paste adhesive with spatula until is uniform.

(5)

Make sure that the C06-067 polyurethane paste adhesive mix is uniform before you apply it to the part.

(6)

After you complete the repair, replace the cap on the cartridge.

Subtask 72-22-43-350-012

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER'S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

Apply the C06-067 polyurethane paste adhesive to the flowpath spacer repair area. Refer to Figure 903 and as follows:

(1)

Use C10-139 gloves to touch the flowpath spacer.

(2)

If you do the repair in area B, make sure that the height of the C06-067 polyurethane paste adhesive is 0.012-0.025 inch (0.31-0.63 mm) above the paint surface without damage and as follows:

(a)

If necessary, apply C10-040 Teflon tape in the adjacent repair area to agree with the minimum thickness requirements.

(3)

If you do the repair in area C, make sure that the height of the C06-067 polyurethane paste adhesive is 0.00-0.015 inch (0.00-0.38 mm) above the paint surface without damage and as follows:

NOTE:

(HES) For dimension paste adhesive above the paint surface without damage of area C and area D in subtask 72-22-43-350-012 is different with the Figure 903. Use dimensions in Figure 903 refer to Case #02083703.

(a)

If necessary, apply C10-040 Teflon tape in the adjacent repair area to agree with the minimum thickness requirements.

(4)

If you do the repair in area D, make sure that the height of the C06-067 polyurethane paste adhesive is 0.00-0.005 inch (0.00-0.12 mm) above the paint surface without damage and as follows:

NOTE:

(a)

If necessary, apply C10-040 Teflon tape in the adjacent repair area to agree with the minimum thickness requirements.

Subtask 72-22-43-350-013

NOTE:

(HES) The use of C10-133 release film is not mandated, however to get a satisfactory cure the C10-133 release film is recommended, especially if the flowpath spacer is not cured in a low moisture environment (relative humidity is less than 40 percent). Recommended steps are to: Use the Teflon spatula to make the C06-067 polyurethane paste adhesive smooth.Remove unwanted polyurethane paste adhesive with C10-182 cloth. Attach C10-133 release film with C10-040 Teflon tape. It is not necessary for the C10-1133 release film to touch the C06-067 paste adhesive. Note that another option is to use the release film to roll the adhesive paste smooth - however clearly here the film will remain in contact with the adhesive during subsequent steps. Refer to Case #01969557.

(5)

Alternative Procedure Available. Make a Teflon spatula to apply the C06-067 polyurethane paste adhesive. Refer to Figure 904 and as follows:

(a)

Use the Teflon spatula to make the C06-067 polyurethane paste adhesive smooth.

Subtask 72-22-43-350-014

(5).A.

Alternative Procedure. Apply a piece of C10-133 release film on top of the C06-067 polyurethane paste adhesive as follows:

(a)

Use a roller on the C10-133 release film to make the C06-067 polyurethane paste adhesive application smooth.

(b)

It is not necessary for the C10-133 release film to touch the C06-067 polyurethane paste adhesive.

(c)

It is recommended to use the C10-133 release film to get a satisfactory cure if the flowpath spacer is not cured in a low moisture environment (relative humidity is less than 40 percent).

(d)

To get a better surface finish, it is recommended that the C10-133 release film does not touch the surface of the C06-067 polyurethane paste adhesive.

Subtask 72-22-43-350-015

(6)

Remove unwanted polyurethane paste adhesive with a C10-182 cloth.

Subtask 72-22-43-350-016

(7)

Optional Procedure. Remove the masking from the repair area.

NOTE:

Removal of masking before the C06-067 polyurethane paste adhesive is fully cured can make a better transition to adjacent areas and prevent peeling.

Subtask 72-22-43-350-017

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER'S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

WARNING:

USE THERMAL GLOVES WHEN YOU MOVE OR TOUCH HOT OR COLD PARTS. HOT OR COLD PARTS CAN CAUSE INJURY.

Alternative Procedure Available. Cure the C06-067 polyurethane paste adhesive at room temperature, at a temperature range of 65 to 85°F (19 to 29°C) for 24 hours.

Subtask 72-22-43-350-018

WARNING:

REFER TO THE PRODUCT LABEL AND THE MANUFACTURER'S (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.

WARNING:

USE THERMAL GLOVES WHEN YOU MOVE OR TOUCH HOT OR COLD PARTS. HOT OR COLD PARTS CAN CAUSE INJURY.

L.A.

Alternative Procedure. Cure the C06-067 polyurethane paste adhesive. Refer to SAE ARP 5144, Heat Application for Thermosetting Resin Curing, and as follows:

(1)

Use a heating device if the relative humidity is more than 40 percent.

NOTE:

A relative humidity of more than 40 percent can prevent full curing of the C06-067 polyurethane paste adhesive. It is recommended to use a heating device if the relative humidity is more than 40 percent.

(2)

Attach a minimum of one thermocouple at a maximum of 0.50 inch (12.7 mm) from each repair area.

(3)

If you repair more than three areas on the flowpath spacer and you use an oven to increase the temperature of the part, then only three thermocouples are necessary.

Subtask 72-22-43-350-019

(4)

Alternative Procedure Available. Keep the repair area at a temperature range of 130 to 170°F (55 to 76°C) for 120-150 minutes.

(a)

Increase the temperature at a maximum rate of 6°F (3°C) for each minute.

Subtask 72-22-43-350-020

(4).A.

Alternative Procedure. Keep the repair area at a temperature range of 170 to 190°F (77 to 87°C) for 60-90 minutes.

(a)

Increase the temperature at a maximum rate of 6°F (3°C) for each minute.

Subtask 72-22-43-350-021

(5)

The flowpath spacer temperature must not be more than 190°F (87°C).

Subtask 72-22-43-350-022

If necessary, remove the release film and masking from the flowpath spacer.

Subtask 72-22-43-350-023

WARNING:

If necessary, sand the flowpath spacer repair area as follows:

(1)

Use C10-141 120-180 grit abrasive paper to sand C06-067 polyurethane paste adhesive to a smooth transition. Refer to Figure 903 and as follows:

(a)

After you removed the release film, sanding is not necessary if the surface of the C06-067 polyurethane paste adhesive has the necessary transition.

(b)

The height of the repaired area measured from the paint surface with no damage must agree with the limits in Figure 903.

(c)

If necessary, sand the surface of the C06-067 polyurethane paste adhesive to have a matte finish.

Subtask 72-22-43-220-054

Do a visual inspection of the flowpath spacer repair area as follows:

(1)

Do an inspection for bubbles, blisters, and contamination. If you find bubbles, blisters, or contamination more than 0.005 inch (0.12 mm) in depth, do the repair again.

(2)

Make sure that the repair area of the exposed fiberglass and carbon fiber in the flowpath spacer has a full cover of C06-067 polyurethane paste adhesive. If the exposed carbon fiber in the flowpath spacer repair area has missing C06-067 polyurethane paste adhesive, do the repair again.

(3)

Do an inspection of the C06-067 polyurethane paste adhesive make sure that it is cured as follows:

(a)

Do an inspection of shape memory (surface keeps initial shape) as follows:

Apply force with the Teflon spatula to the cured surface to cause a movement of 0.001-0.003 inch (0.03-0.07 mm).

Remove the Teflon spatula.

Make sure that the surface of the C06-067 polyurethane paste adhesive keeps the initial shape (shape memory).

(b)

The cured surface must be dry.

(c)

If the C06-067 polyurethane paste adhesive is not cured, remove the non-cured C06-067 polyurethane paste adhesive from the repair area and do the repair again.

* * * FOR ALL