Repair the Crack in the Fan Case Liner Panel - VRS1802 [IAE]

TASK 72-32-87-300-010-A
Repair the Crack in the Fan Case Liner Panel - VRS1802

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	GUN - HOT AIR
No specific	AR	MACHINE - DRILLING
No specific	AR	SPATULA - NON METALLIC
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-348)	cleaning solvent
(Material No.V02-018)	brush
(Material No.V05-016)	garnet paper
(Material No.V05-017)	garnet paper
(Material No.V08-047)	hardener
(Material No.V08-048)	resin
(Material No.V08-049)	fiberglass cloth
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Fan Case Liner Panel - Crack Repair

3. Job Set-up
Subtask 72-32-87-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 72-32-87-010-057-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 72-32-87-040-057-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser.

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 72-32-87-010-059-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 72-32-87-350-050-A ** ON A/C NOT FOR ALL

A. Drill Stop Holes at the Ends of the Crack

CAUTION: BE CAREFUL THAT YOU DO NOT CAUSE DAMAGE TO THE FAN CASE INNER WALL WHEN YOU DRILL THE STOP HOLES.

(1) Use a 0.125 in. (3.17 mm) MACHINE - DRILLING to drill stop holes at both ends of each crack.

Subtask 72-32-87-110-052-A ** ON A/C NOT FOR ALL

B. Clean the Damaged Area
(1) Hand clean the damaged area with garnet paper (Material No.V05-017) or garnet paper (Material No.V05-016) .
(2) Prepare the cleaning solvent (Material No.V01-348) . Refer to the manufacturer's instructions.
(3) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning solvent (Material No.V01-348) , to clean the repair area.
(4) Wipe the repair area with a Textile-Lint free Cotton - (Material No.14SBA1) , made moist with distilled water.

Subtask 72-32-87-350-051-A ** ON A/C NOT FOR ALL

C. Prepare the Bond Patches
(1) Find the three sizes of the bond patches for each crack.
(2) Cut the bond patches to the correct sizes from the fiberglass cloth (Material No.V08-049) .

NOTE: The sizes of the three bond patches for each crack are different.

NOTE: All three patches are installed on each repair area.

Subtask 72-32-87-350-052-A ** ON A/C NOT FOR ALL

D. Prepare the Resin Mixture
(1) Measure 100 parts of the resin (Material No.V08-048) by weight. Measure 10 to 12 parts of the hardener (Material No.V08-047) by weight.
(2) Put 3.5 oz (100 g) of resin (Material No.V08-048) in to a container. Add between 0.35 oz (10 g) and 0.42 oz (12 g) of hardener (Material No.V08-047) and mix them with a SPATULA - NON METALLIC.

NOTE: When mixed the life of the resin mixture is approximately one hour at room temperature.

NOTE: It is recommended that the quantity of the mixture that you make each time is approximately 2.03 oz (100 g).

Subtask 72-32-87-350-053-A ** ON A/C NOT FOR ALL

E. Apply the resin mixture on to the repair area and the three bond patches.
(1) Use the brush (Material No.V02-018) to apply the resin mixture to the damage holes, the cracks, the stop holes and the surface to which the bond patches will be installed.
(2) Use the brush (Material No.V02-018) to apply the resin mixture to both surfaces of each of the bond patches.
(3) Remove all unwanted resin mixture and make the surfaces smooth.

Subtask 72-32-87-350-054-A ** ON A/C NOT FOR ALL

F. Install the bond patches on the repair area
(1) Install the first bond patch (smallest size) on the repair area to cover all the damaged area.
(2) Install the second bond patch (middle size) on the repair area to cover the first bond patch.
(3) Install the third bond patch (largest size) on the repair area to cover the second bond patch.
(4) Use the GUN - HOT AIR to cure the bond patches for three hours at between 131 deg.F (55 deg.C) and 149 deg.F (65 deg.C) .

Subtask 72-32-87-210-052-A ** ON A/C NOT FOR ALL

G. Examine the repair area to make sure that the bonds are satisfactory.

5. Close-up
Subtask 72-32-87-410-057-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
(3) Remove the access platform(s).

Subtask 72-32-87-440-054-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 72-32-87-410-062-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:45:52 UTC