Repair of the Fan Case V-Groove - VRS1995 [IAE]

TASK 72-32-85-300-802-A
Repair of the Fan Case V-Groove - VRS1995

1. Reason for the Job
This task gives the repair procedure for the damage on the V-groove of the fan case.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	1	MACHINE - GRINDING, PORTABLE
No specific	1	MAGNIFYING GLASS POWER 10X
No specific	1	MAT - WORK
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V05-020)	waterproof silicon carbide
(Material No.V05-021)	Waterproof silicon carbide abrasive paper
(Material No.V06-064)	Fluorescent penetrant

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 70-23-05-230-010-A	Local Application of Fluorescent Penetrant Inspection
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
Blend Repair of the Fan Case V-Groove

3. Job Set-up
Subtask 72-32-85-941-143-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine shutdown occurred five minutes or more before you do this procedure.
(3) On 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) in position to tell persons not to energize FADEC 1(2).

Subtask 72-32-85-010-127-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 72-32-85-040-057-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 HCU (Ref. AMM TASK 78-30-00-040-012).

Subtask 72-32-85-010-128-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-85-941-144-A ** ON A/C NOT FOR ALL

E. Put the support equipment in position:
(1) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position to get access to the engine.
(2) Put the MAT - WORK in position in the fan case cowl.
(a) Make sure that you can see the red warning flags of the MAT - WORK from the outside of the aircraft.
(b) Make sure that the MAT - WORK has sufficient dimensions to give a full protection to the surface of the lower half of the fan case.

4. Procedure
Subtask 72-32-85-320-050-A ** ON A/C NOT FOR ALL

A. Repair of the Damage on the V-Groove of the Fan Case

Blend Repair of the Fan Case V-Groove ** ON A/C NOT FOR ALL

(1) Blend to remove the damage on the V-groove of the fan case. Use the MACHINE - GRINDING, PORTABLE, waterproof silicon carbide (Material No.V05-020) and Waterproof silicon carbide abrasive paper (Material No.V05-021) . Remove the minimum quantity of material necessary to remove the damage.
(2) Make the repaired area smooth and polish it. Use Waterproof silicon carbide abrasive paper (Material No.V05-021) . The surface finish on the repaired area must be same as that of the adjacent area.

Subtask 72-32-85-210-145-A ** ON A/C NOT FOR ALL

B. Visual Inspection of the Repaired Area
(1) Use a MAGNIFYING GLASS POWER 10X. Nicks, dents, pits, scratches, burrs and galls are not permitted.

Subtask 72-32-85-230-050-A ** ON A/C NOT FOR ALL

C. Penetrant Crack Test on the Repaired Area (Ref. AMM TASK 70-23-05-230-010)
(1) Use Fluorescent penetrant (Material No.V06-064) . Make sure that there are no cracks on the repaired area.

5. Close-up
Subtask 72-32-85-942-115-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) Remove the MAT - WORK.
(3) Remove the access platform(s).

Subtask 72-32-85-410-123-A ** ON A/C NOT FOR ALL

B. Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 72-32-85-440-057-A ** ON A/C NOT FOR ALL

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

Subtask 72-32-85-410-124-A ** ON A/C NOT FOR ALL

D. 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 02:45:44 UTC