DOC AIRBUS | AMM A320FInstallation of the Low Pressure (LP) Turbine Shaft Blind Cap [IAE]
TASK 72-51-41-400-012-B
Installation of the Low Pressure (LP) Turbine Shaft Blind Cap
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 72-51-41-860-053-A ** ON A/C NOT FOR ALL
Subtask 72-51-41-110-053-A ** ON A/C NOT FOR ALL
Subtask 72-51-41-410-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:46:36 UTC
Installation of the Low Pressure (LP) Turbine Shaft Blind Cap
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| IAE1J12244 | 1 | SLEEVE SIZING |
| IAE1J12263 | 1 | SLIDER INSPECTION |
| IAE1J12523 | 1 | SLIDER-SEAL |
| IAE1P17039 | 1 | PULLER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-124) | Isopropyl Alcohol, Technical grade |
| (Material No.V10-077) | lubricant (engine oil) |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 3 | INTERNAL RETAINING RING | AIPC 72-50-41-80-040 |
| 5 | SEALING RING | AIPC 72-50-41-80-050 |
| 4 | BLIND CAP | AIPC 72-50-41-80-060 |
| 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 72-38-11-400-010-A | Installation of the Inlet Cone |
| TASK 72-51-41-400-010-B | Installation of the No.5 Bearing Compartment Cover |
| TASK 78-11-12-400-010-A | Installation of the Engine Exhaust Cone |
| 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 |
Install the Blind capSubtask 72-51-41-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
Subtask 72-51-41-010-065-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
B. Get Access
(1) Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 72-51-41-040-058-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated: (Ref. AMM TASK 78-30-00-040-012)
4. ProcedureSubtask 72-51-41-110-053-A ** ON A/C NOT FOR ALL
A. Cleaning the Surfaces
(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist withV01-124 Isopropyl Alcohol, Technical grade
(a) The inlet surfaces of the LP turbine shaft, stub shaft and fan disk if necessary.
(b) The surfaces of the blind cap (4).
(c) The internal retaining ring (3).
Subtask 72-51-41-210-051-A ** ON A/C NOT FOR ALL (1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with
(a) The inlet surfaces of the LP turbine shaft, stub shaft and fan disk if necessary.
(b) The surfaces of the blind cap (4).
(c) The internal retaining ring (3).
B. Inspection of the Blind Cap
(1) Examine the blind cap for cracks
(a) If it is cracked, reject it.
(2) Examine the blind cap outer diameter
(a) If it is scored, reject it.
(3) Examine the blind cap scallops at location
(a) If it is burred, reject it.
(4) Examine the blind cap sealing ring groove
(a) If it is nicked, reject it.
(b) If it is scratched, reject it.
(5) Examine the blind cap surface
(a) If it is nicked, reject it.
(b) If it is scratched, reject it.
Subtask 72-51-41-420-053-A ** ON A/C NOT FOR ALL (1) Examine the blind cap for cracks
(a) If it is cracked, reject it.
(2) Examine the blind cap outer diameter
(a) If it is scored, reject it.
(3) Examine the blind cap scallops at location
(a) If it is burred, reject it.
(4) Examine the blind cap sealing ring groove
(a) If it is nicked, reject it.
(b) If it is scratched, reject it.
(5) Examine the blind cap surface
(a) If it is nicked, reject it.
(b) If it is scratched, reject it.
C. Install the Blind Cap to the LP Turbine Shaft
Pre SBE 72-0227
(Method 1, with tools).
(a) Put the AIPC 72-50-41-80-060 BLIND CAP (4) with rear end down on to a work bench.
(b) Install the IAE1J12263 SLIDER INSPECTION 1 off on to the blind cap.
(c) Lubricate the AIPC 72-50-41-80-050 SEALING RING (5) withV10-077 lubricant (engine oil)
(d) Lubricate the outer diameter faces of the seal slider and the blind cap withV10-077 lubricant (engine oil)
(e) Put the sealing ring with the open side down on to the seal slider.
(f) Push the sealing ring down:
(g) Remove the seal slider from the blind cap.
(2) Make the sealing ring diameter smaller as follows:
(b) Lubricate the inner diameter face of the sizing sleeve and the outer diameter of the sealing ring withV10-077 lubricant (engine oil)
(c) Put the blind cap in to the sizing sleeve. Diaphragm of the blind cap must be in down direction (position A).
(d) Slowly push down the blind cap until it touches the work bench (position B).
(e) Keep the blind cap in the sizing sleeve for ten or more minutes.
(f) Remove the sizing sleeve from the blind cap.
(3) Install the AIPC 72-50-41-80-050 SEALING RING (5) into the bottom half of groove of the blind cap as follows: (Method 2, without tools).
V10-077 lubricant (engine oil)
(b) Install the sealing ring in to the bottom half of the groove of the blind cap. Open side of the sealing ring must be rearward.
(c) Install the sealing ring around all the groove of the blind cap.
(d) Push the sealing ring inner face in direction YA with finger sides to let the sealing ring go in to the groove of the blind cap.
(e) Move the fingers in direction YB.
(f) Repeat step (d) and (e) until the sealing ring is installed around all of the groove.
(4) Examine the sealing ring.
(b) Make sure that the sealing ring is not twisted.
(5) Install the blind cap to the LP turbine shaft. Use the IAE1P17039 PULLER, which also functions a driver tool.
(6) Install the AIPC 72-50-41-80-040 INTERNAL RETAINING RING (3).
Subtask 72-51-41-420-056-A ** ON A/C NOT FOR ALL Pre SBE 72-0227
NOTE: - Use of IAE1J12263 SLIDER INSPECTION without IAE1J12244 SLEEVE SIZING is not permitted.
(1) Extend the sealing ring and install it to the blind cap as follows: - if tools are not available, proceed with step (3).
(Method 1, with tools).
(a) Put the AIPC 72-50-41-80-060 BLIND CAP (4) with rear end down on to a work bench.
(b) Install the IAE1J12263 SLIDER INSPECTION 1 off on to the blind cap.
(c) Lubricate the AIPC 72-50-41-80-050 SEALING RING (5) with
(d) Lubricate the outer diameter faces of the seal slider and the blind cap with
(e) Put the sealing ring with the open side down on to the seal slider.
(f) Push the sealing ring down:
CAUTION:
MOVE THE SEALING RING SMOOTHLY AND EQUALLY OVER THE ALL CIRCUMFERENCE. IF NOT SO, THE SEALING RING IS EXTENDED LOCALLY. LOCAL EXTENSION CAN CAUSE DAMAGE TO THE SEALING RING.
1 Push the sealing ring down with four or more fingers until it is installed in to the groove of the blind cap. (g) Remove the seal slider from the blind cap.
(2) Make the sealing ring diameter smaller as follows:
CAUTION:
DO NOT INSTALL THE BLIND CAP AND THE SEALING RING INTO THE LP TURBINE SHAFT BEFORE THE SIZE OF THE SEALING RING IS REDUCED WHEN THE SEALING RING DIAMETER IS EXTENDED. THE LP TURBINE SHAFT BORE CAN CAUSE DAMAGE TO THE EXTENDED SEALING RING.
(a) Put the IAE1J12244 SLEEVE SIZING 1 off on to the work bench with the front end down. (b) Lubricate the inner diameter face of the sizing sleeve and the outer diameter of the sealing ring with
(c) Put the blind cap in to the sizing sleeve. Diaphragm of the blind cap must be in down direction (position A).
(d) Slowly push down the blind cap until it touches the work bench (position B).
(e) Keep the blind cap in the sizing sleeve for ten or more minutes.
(f) Remove the sizing sleeve from the blind cap.
(3) Install the AIPC 72-50-41-80-050 SEALING RING (5) into the bottom half of groove of the blind cap as follows: (Method 2, without tools).
CAUTION:
DO NOT PUSH THE SEALING RING IN DIRECTION X. THE EDGE OF THE BLIND CAP CAN CAUSE DAMAGE TO THE SEALING RING. DO NOT TWIST THE SEALING RING. A DEFECTIVE SEALING RING WILL CAUSE AN OIL LEAK.
CAUTION:
THE SEALING RING CAN BE DAMAGED IF IT IS EXTENDED TOO MUCH AND CAN CAUSE OIL TO LEAK.
(a) Lubricate the sealing ring and the blind cap with (b) Install the sealing ring in to the bottom half of the groove of the blind cap. Open side of the sealing ring must be rearward.
(c) Install the sealing ring around all the groove of the blind cap.
(d) Push the sealing ring inner face in direction YA with finger sides to let the sealing ring go in to the groove of the blind cap.
(e) Move the fingers in direction YB.
(f) Repeat step (d) and (e) until the sealing ring is installed around all of the groove.
(4) Examine the sealing ring.
CAUTION:
DO NOT CORRECT TWISTED CONDITION OF THE SEALING RING. DISCARD THE TWISTED SEALING RING.
(a) Make sure that there is no damage on the surface. (b) Make sure that the sealing ring is not twisted.
(5) Install the blind cap to the LP turbine shaft. Use the IAE1P17039 PULLER, which also functions a driver tool.
(6) Install the AIPC 72-50-41-80-040 INTERNAL RETAINING RING (3).
D. Install the Blind Cap to the LP Turbine Shaft
SBE 72-0227: LP turbine - provide a new blind cap with decreased seal land height
(1) Install the AIPC 72-50-41-80-050 SEALING RING (5) on the blind cap as follows:
(Method 1, with tools).
(a) Put the AIPC 72-50-41-80-060 BLIND CAP (4) with the front end down on to a work bench.
(b) Install the IAE1J12523 SLIDER-SEAL 1 off on to the blind cap.
(c) Lubricate the AIPC 72-50-41-80-050 SEALING RING (5) withV10-077 lubricant (engine oil)
(d) Lubricate the outer diameter faces of the seal slider and the blind cap withV10-077 lubricant (engine oil)
(e) Put the sealing ring on the seal slider. The open side of the sealing ring must be in the up direction.
(g) Remove the seal slider from the blind cap.
(2) Examine the sealing ring.
(a) Make sure that there is no damage on the surface.
(3) Install the blind cap to the LP turbine shaft. Use the IAE1P17039 PULLER, which also functions a driver tool.
5. Close-upSBE 72-0227: LP turbine - provide a new blind cap with decreased seal land height
(1) Install the AIPC 72-50-41-80-050 SEALING RING (5) on the blind cap as follows:
(Method 1, with tools).
(a) Put the AIPC 72-50-41-80-060 BLIND CAP (4) with the front end down on to a work bench.
(b) Install the IAE1J12523 SLIDER-SEAL 1 off on to the blind cap.
(c) Lubricate the AIPC 72-50-41-80-050 SEALING RING (5) with
(d) Lubricate the outer diameter faces of the seal slider and the blind cap with
(e) Put the sealing ring on the seal slider. The open side of the sealing ring must be in the up direction.
CAUTION:
MOVE THE SEALING RING SMOOTHLY AND EQUALLY OVER THE ALL CIRCUMFERENCE. IF NOT SO, THE SEALING RING IS EXTENDED LOCALLY. LOCAL EXTENSION CAN CAUSE DAMAGE TO THE SEALING RING.
(f) Put the sealing ring down with four or more fingers until it is installed in to the groove of the blind cap. (g) Remove the seal slider from the blind cap.
(2) Examine the sealing ring.
(a) Make sure that there is no damage on the surface.
CAUTION:
DO NOT CORRECT TWISTED CONDITION OF THE SEALING RING. DISCARD THE TWISTED SEALING RING.
(b) Make sure that the sealing ring is not twisted. (3) Install the blind cap to the LP turbine shaft. Use the IAE1P17039 PULLER, which also functions a driver tool.
CAUTION:
DO NOT USE THE INTERNAL RETAINING RING P/N RR312 (PRE SBE 72-0227) WITH THE BLIND CAP P/N 5A1705.
(4) Install the AIPC 72-50-41-80-040 INTERNAL RETAINING RING (3). Subtask 72-51-41-410-054-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Install the No.5 Bearing Compartment Cover (Ref. AMM TASK 72-51-41-400-010).
(2) Install the Inlet Cone (Ref. AMM TASK 72-38-11-400-010).
(3) Install the Exhaust Cone (Ref. AMM TASK 78-11-12-400-010).
Subtask 72-51-41-440-053-A ** ON A/C NOT FOR ALL Subtask 72-51-41-410-056-A ** ON A/C NOT FOR ALL (1) Install the No.5 Bearing Compartment Cover (Ref. AMM TASK 72-51-41-400-010).
(2) Install the Inlet Cone (Ref. AMM TASK 72-38-11-400-010).
(3) Install the Exhaust Cone (Ref. AMM TASK 78-11-12-400-010).