DOC AIRBUS | AMM A320FRepair of the Fan Case - VRS1806 - Post SBE 72-0160 [IAE]
TASK 72-32-85-300-042-A
Repair of the Fan Case - VRS1806 - Post SBE 72-0160
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-32-85-941-127-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-350-073-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-942-106-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:01:07 UTC
Repair of the Fan Case - VRS1806 - Post SBE 72-0160
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
CAUTION:
SILICON CARBIDE TYPE WHEELS, STONES AND ABRASIVE PAPERS ARE TO BE USED FOR THIS REPAIR. ALUMINUM OXIDE TYPES MUST NOT BE USED.
CAUTION:
THE MATERIAL WILL OXIDIZE AND CRACK IF MECHANICAL CUTTERS ARE USED HEAVILY. THIS HAS OCCURRED IF THE COMPONENT SHOWS DARK STRAW TO BLUE DISCOLORATION.
IF AT ANY TIME THIS COLORATION OCCURS THE CASES MUST BE REJECTED
CAUTION:
THE FAN CASE IS MADE FROM TITANIUM ALLOY AND IS THIN IN SOME AREAS. IF YOU BLEND TOO MUCH, THE PART CANNOT BE SERVICEABLE AND WILL HAVE TO BE REPLACED.
CAUTION:
DO NOT OPERATE WITHOUT SAFETY GOGGLES AND OTHER GUARD EQUIPMENT. FLYING PARTICLES CAN CAUSE INJURY.
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | BRUSH - WIRE, ROTARY |
| No specific | AR | MACHINE - HAND GRINDING, PNEUMATIC |
| No specific | AR | MAT - WORK |
| No specific | AR | THICKNESS MEASURING EQUIPMENT - ULTRASONIC |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V05-020) | waterproof silicon carbide |
| (Material No.V05-021) | Waterproof silicon carbide abrasive paper |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| 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 |
Blend Repair the Fan CaseSubtask 72-32-85-941-127-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 72-32-85-010-098-A ** ON A/C NOT FOR ALL (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).
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 72-32-85-040-056-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
C. Deactivate the Thrust Reverser
Subtask 72-32-85-010-099-A ** ON A/C NOT FOR ALL 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). 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
Subtask 72-32-85-941-128-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
E. Put the ground support equipment into position.
(1) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(2) Put the MAT - WORK in position in the fan case.
4. Procedure(1) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(2) Put the MAT - WORK in position in the fan case.
NOTE: Make sure that the red warning pennants of the workmat can be seen externally.
NOTE: Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the fan case.
Subtask 72-32-85-350-073-A ** ON A/C NOT FOR ALL
A. General Instructions for the Blend Repair of the Fan Case
(1) Blend the burred, galled and scored with MACHINE - HAND GRINDING, PNEUMATIC, BRUSH - WIRE, ROTARY and Waterproof silicon carbide abrasive paper (Material No.V05-021) to remove damage.
Subtask 72-32-85-350-074-A ** ON A/C NOT FOR ALL (1) Blend the burred, galled and scored with MACHINE - HAND GRINDING, PNEUMATIC, BRUSH - WIRE, ROTARY and Waterproof silicon carbide abrasive paper (Material No.V05-021) to remove damage.
NOTE: The blend ratio, length to depth, must be a minimum of 30 to 1.
NOTE: Keep the material removal to the minimum necessary to remove damage.
NOTE: The surface texture of all repaired surface must have the same or better quality to that of the adjacent not damaged area.
NOTE: Maximum surface area per blend is 4.00 in.2 (2580.64 mm2) and maximum number of blend is 20 totally on the inner and outer surface of containment area.
(2) Polish the blended areas with waterproof silicon carbide (Material No.V05-020) to make the blended surface as smooth as the initial surface. B. Blend Repair of the Fan Case
(1) Maximum blend limit on the flange, Location 1 is 0.010 in. (0.25 mm) in depth.
(2) Maximum blend limit on the outer surface and inner surface, Locations 2 and 3 are 0.010 in. (0.25 mm) in depth except the corner, Location 6 and containment areas, Locations 7 and 8.
(3) Maximum blend limit on the hook, Location 4 is 0.010 in. (0.25 mm) in depth.
(4) Maximum blend limit on the flexible ring front, Location 5 is 0.059 in. (1.50 mm) in depth.
(a) Blending is permitted only if no previous blend repair or damage exists on the opposite side of the flexible ring front at the same circumferential position.
(5) Maximum blend limit on the flexible ring rear, Location 9 is 0.029 in. (0.74 mm) in depth.
(a) Blending is permitted only if no previous blend repair or damage exists on the opposite side of the flexible ring rear at the same circumferential position.
(6) Maximum blend limit on the flexible ring inner surface, Location 10 is 0.010 in. (0.25 mm) in depth.
(a) Blending is permitted only if no previous blend repair or damage exists on the opposite side of the flexible ring inner surface at the same circumferential position.
(7) Maximum blend limit on the corner, Location 6 is 0.059 in. (1.50 mm) in depth.
(8) Blending is permitted in the containment areas, Locations 7 and 8 only if the minimum wall thickness can be maintained.
Subtask 72-32-85-210-121-A ** ON A/C NOT FOR ALL (1) Maximum blend limit on the flange, Location 1 is 0.010 in. (0.25 mm) in depth.
(2) Maximum blend limit on the outer surface and inner surface, Locations 2 and 3 are 0.010 in. (0.25 mm) in depth except the corner, Location 6 and containment areas, Locations 7 and 8.
(3) Maximum blend limit on the hook, Location 4 is 0.010 in. (0.25 mm) in depth.
(4) Maximum blend limit on the flexible ring front, Location 5 is 0.059 in. (1.50 mm) in depth.
(a) Blending is permitted only if no previous blend repair or damage exists on the opposite side of the flexible ring front at the same circumferential position.
(5) Maximum blend limit on the flexible ring rear, Location 9 is 0.029 in. (0.74 mm) in depth.
(a) Blending is permitted only if no previous blend repair or damage exists on the opposite side of the flexible ring rear at the same circumferential position.
(6) Maximum blend limit on the flexible ring inner surface, Location 10 is 0.010 in. (0.25 mm) in depth.
(a) Blending is permitted only if no previous blend repair or damage exists on the opposite side of the flexible ring inner surface at the same circumferential position.
(7) Maximum blend limit on the corner, Location 6 is 0.059 in. (1.50 mm) in depth.
(8) Blending is permitted in the containment areas, Locations 7 and 8 only if the minimum wall thickness can be maintained.
NOTE: Thickness can be measured using an THICKNESS MEASURING EQUIPMENT - ULTRASONIC.
NOTE: It is necessary to make sure that the ultrasonic wall thickness measuring equipment was calibrated by the necessary procedures given in operation manuals of the measuring equipment or local regulations. Calibration piece to be made from the same material (Ti-6Al-4V) or a material with the same acoustic velocity as the part to be tested. The calibration piece thickness must be within the thickness limits of the part to be measured.
C. Examine the Blend Repaired Area
(1) Measure the dimensions of the blended areas
(a) Maximum blended area per blend is 4.00 in.2 (2580.64 mm2) and maximum number of blend is 20 totally on the inner and outer surface of containment areas.
(b) The blended area must satisfy minimum blend ratio. The blend ratio must be a minimum of 30 to 1.
5. Close-up(1) Measure the dimensions of the blended areas
(a) Maximum blended area per blend is 4.00 in.2 (2580.64 mm2) and maximum number of blend is 20 totally on the inner and outer surface of containment areas.
(b) The blended area must satisfy minimum blend ratio. The blend ratio must be a minimum of 30 to 1.
Subtask 72-32-85-942-106-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 workmat from the fan case.
(3) Remove the access platform(s).
Subtask 72-32-85-410-098-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the workmat from the fan case.
(3) Remove the access platform(s).
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 72-32-85-440-056-A ** ON A/C NOT FOR ALL Subtask 72-32-85-410-099-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR