W DOC AIRBUS | AMM A320F

Removal of the Low Pressure (LP) Turbine Active Clearance Control (ACC) Manifold and Tubes [IAE]

TASK 75-24-49-000-010-B
Removal of the Low Pressure (LP) Turbine Active Clearance Control (ACC) Manifold and Tubes

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.
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
WARNING NOTICE(S)
IAE1M14077
1
PLUG, PROTECTIVE
IAE1M14083
1
PLUG, PROTECTIVE
IAE1M14084
1
FIXTURE, SUPPORT
 B. 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
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-010-A
Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 75-24-48-000-010-A
Removal of the Turbine CLG Manifold Assembly
TASK 78-30-00-040-012-A
Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-32-00-010-010-A
Opening of the Thrust Reverser Halves
F Tube Connector from LP Turbine ACC
F Tube Connector from LP Turbine ACC
F Lower LPT Cooling Air Duct from LPT Case
F Lower LPT Cooling Air Duct from LPT Case
F Lower LPT Cooling Air Duct from LPT Case
F Lower LPT Cooling Air Duct from LPT Case
F Lower LPT Cooling Air Duct from LPT Case
F Lower LPT Cooling Air Duct from LPT Case
F LPT Cooling Air Duct and Support Fixture
F Upper LPT Cooling Air Duct from LPT Case
F Upper LPT Cooling Air Duct from LPT Case
F Upper LPT Cooling Air Duct from LPT Case
3. Job Set-up
Subtask 75-24-49-941-055-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 75-24-49-010-058-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 75-24-49-040-051-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 75-24-49-010-055-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 75-24-49-020-062-A ** ON A/C NOT FOR ALL
A. Removal of the Tube Connector from the LP Turbine ACC
F Tube Connector from LP Turbine ACC ** ON A/C NOT FOR ALL

PRE SBE 75-0051

   (1) Remove the wire (13) from the spring clips at the T-piece of the tube connector (11).
   (2) Disengage the periseal housing (14) from the three spring clips and retract it from the T-piece above the ACC rear duct.
   (3) Remove the ACC rear duct.
   (4) Remove the nuts and the bolts from the two retaining clamps (10) and (15) which safety the periseal connectors (9) and (16) to the tube connector (11).
   (5) Retract the periseal connectors above the ends of the tube connector (11).
   (6) Remove the bolts (6) and (4) and the washers (3) and (5) that attach the tube connector (11) to the supports.
   (7) Loosen the bolt (17) from the T-piece angle bracket that attaches the tube connector (11) to the support.
   (8) Remove the tube connector (11) from the LP turbine case.
   (9) Remove the two periseal connectors (9) and (16), the two retaining clamps (10) and (15) and the two clamps (2) and (7) from the tube connector (11).
   (10) Remove the bolt (17), the washer (18) and the spacer (12) from the T-piece angle bracket.
   (11) Remove the periseal housing (14) from the ACC rear duct.

END OF PRE SBE 75-0051
Subtask 75-24-49-020-069-A ** ON A/C NOT FOR ALL
B. Removal of the Tube Connector from the LP Turbine ACC
F Tube Connector from LP Turbine ACC ** ON A/C NOT FOR ALL

POST SBE 75-0051: LP Turbine ACC Connector (T-piece) as precision casting

   (1) Loosen the two bolts (14) of the T-piece of the tube connector (11).
   (2) Remove the bolts (14) and the two periseal clamps (13).
   (3) Disengage the periseal housing (15) and retract it from the T-piece above the ACC rear duct.
   (4) Remove the ACC rear duct.
   (5) Remove the nuts and the bolts from the two retaining clamps (10) and (16) which safety the periseal connectors (9) and (17) to the tube connector (11).
   (6) Retract the periseal connectors above the ends of the tube connector (11).
   (7) Remove the bolts (6) and (4) and the washers (3) and (5) that attach the tube connector (11) to the supports.
   (8) Loosen the bolt (18) from the T-piece angle bracket that attaches the tube connector (11) to the support.
   (9) Remove the tube connector (11) from the LP turbine case.
   (10) Remove the two periseal connectors (9) and (17), the two retaining clamps (10) and (16) and the two clamps (2) and (7) from the tube connector (11).
   (11) Remove the bolt (18), the washer (19) and the spacer (12) from the T-piece angle bracket.
   (12) Remove the periseal housing (15) from the ACC rear duct.

END OF POST SBE 75-0051
Subtask 75-24-49-020-063-A ** ON A/C NOT FOR ALL
C. Remove the left and the right High Pressure (HP) ACC manifold tubes (Ref. AMM TASK 75-24-48-000-010).
Subtask 75-24-49-020-064-A ** ON A/C NOT FOR ALL
D. Removal of the Lower LP Turbine Cooling Air Duct from the LP Turbine Case
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (1) Loosen the eight bolts (9).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Do not remove the bolts at this time.
   (2) Loosen the eight bolts (8).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Do not remove the bolts at this time.
   (3) Loosen the sixteen bolts (5).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Do not remove the bolts at this time.
   (4) Loosen the sixteen bolts (10).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Do not remove the bolts at this time.

Pre SBE 75-0095
   (5) Remove the bolts (4) and (11), the washer (12) and the spacers (5), (1) and (13) that attach the support assembly (2) to the LP turbine case. Discard the spacers (1) and (13).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SB 75-0095
   (6) Remove the bolts (4) and (11), the washer (12) and the spacers (5), (1) and (13) that attach the support assembly (2) to the LP turbine case.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

Pre SBE 75-0095
   (7) Remove the bolts (1) and (4), the washer (5) and the spacers (2), (3) and (11) that attach the support assembly (7) to the LP turbine case. Discard the spacers (2) and (3).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SBE 75-0095
   (8) Remove the bolts (1) and (4), the washer (5) and the spacers (2), (3) and (11) that attach the support assembly (7) to the LP turbine case.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

Pre SBE 75-0095
   (9) Remove the bolts (2) and (7), the washers (6) and the spacers (1), (3) and (5) that attach the lower LP turbine cooling air duct (4) to the LP turbine case. Discard the spacers (1) and (5).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-005

SBE 75-0095
   (10) Remove the bolts (2) and (7), the washers (6) and the spacers (1), (3) and (5) that attach the lower LP turbine cooling air duct (4) to the LP turbine case.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

Pre SBE 75-0095
   (11) Remove the bolts (11) and (3), the washer (2), the spacers (1), (12) and (13) that attach the support assembly (6) to the LP turbine case. Discard the spacers (1) and (13).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SBE 75-0095
   (12) Remove the bolts (11) and (3), the washer (2), the spacers (1), (12) and (13) that attach the support assembly (6) to the LP turbine case.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

Pre SBE 75-0095
   (13) Remove the bolts (1) and (6), the washer (5) and the spacers (2), (3) and (4) that attach the support assembly (8) to the LP turbine case. Discard the spacers (3) and (4).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SBE 75-0095
   (14) Remove the bolts (1) and (6), the washer (5) and the spacers (2), (3) and (4) that attach the support assembly (8) to the LP turbine case.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

   (15) Disengage both ends of the upper LP turbine cooling air duct tubes from the two support assemblies (6) and (8).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (16) Remove the lower LP turbine cooling air duct (4) from the LP turbine case and position it on a work bench.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Subtask 75-24-49-020-065-A ** ON A/C NOT FOR ALL
E. Removal of the Support Assemblies from the Lower LP Turbine Cooling Air Duct
   (1) Remove the bolt (4), the clip nut (2) and the two brackets (1) and (3) from the lower LP turbine cooling air duct.
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (2) Remove the sixteen bolts (5) from the support assembly (6).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (3) Move the support assembly (6) above the tube ends of the lower LP turbine cooling air duct.
   (4) Remove the sixteen bolts (10) from the support assembly (8).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (5) Remove the support assembly (8) above the tube ends of the lower LP turbine cooling air duct.
   (6) Remove the eight bolts (9) from the support assembly (2).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (7) Move the support assembly (2) above the tube ends of the lower LP turbine cooling air duct.
   (8) Remove the eight bolts (8) from the support assembly (7).
F Lower LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (9) Move the support assembly (7) above the tube ends of the lower LP turbine cooling air duct.
Subtask 75-24-49-480-053-A ** ON A/C NOT FOR ALL
F. Installation of the Lower LP Turbine Cooling Air Duct on to the Support Fixture
F LPT Cooling Air Duct and Support Fixture ** ON A/C NOT FOR ALL
   (1) Install the lower LP turbine cooling air duct (2) on to the IAE1M14084 FIXTURE, SUPPORT (5). Make sure that the tube ends are engaged correctly in their holes.
   (2) Safety the cooling air duct to the support fixture with the swing bolt (6), the knurled knob (1), the washer (3) and the screws (4).
Subtask 75-24-49-020-066-A ** ON A/C NOT FOR ALL
G. Removal of the Upper LP Turbine Cooling Air Duct from the LP Turbine Case
   (1) Loosen the eight bolts (5).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Do not remove the bolts at this time.
   (2) Loosen the eight bolts (1).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Do not remove the bolts at this time.

Pre SBE 75-0095
   (3) Remove the bolts (2) and (10), the washer (1) and the spacers (11), (12) and (13) that attach the support assembly (4) to the LP turbine case. Discard the spacers (12) and (13).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SBE 75-0095
   (4) Remove the bolts (2) and (10), the washer (1) and the spacers (11), (12) and (13) that attach the support assembly (4) to the LP turbine case.
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

Pre SBE 75-0095
   (5) Remove the bolts (9) and (3), the washer (4) and the spacers (5), (6) and (8) that attach the support assembly (7) to the LP turbine case. Discard the spacers (5) and (6).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SBE 75-0095
   (6) Remove the bolts (9) and (3), the washer (4) and the spacers (5), (6) and (8) that attach the support assembly (7) to the LP turbine case.
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

Pre SBE 75-0095
   (7) Remove the bolts (2) and (6), the washer (3) and the spacers (4), (5) and (7) that attach the upper LP turbine cooling air duct (1) to the LP turbine case. Discard the spacers (4) and (5).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of Pre SBE 75-0095

SBE 75-0095
   (8) Remove the bolts (2) and (6), the washer (3) and the spacers (4), (5) and (7) that attach the upper LP turbine cooling air duct (1) to the LP turbine case.
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
End of SBE 75-0095

   (9) Remove the upper LP turbine cooling air duct from the LP turbine case and position it on a work bench.
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
Subtask 75-24-49-020-067-A ** ON A/C NOT FOR ALL
H. Removal of the Support Assemblies from the Upper LP Turbine Cooling Air Duct
   (1) Remove the eight bolts (5) from the support assembly (4).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (2) Move the support assembly (4) above the tube ends of the upper LP turbine cooling air duct.
   (3) Remove the eight bolts (1) from the support assembly (7).
F Upper LPT Cooling Air Duct from LPT Case ** ON A/C NOT FOR ALL
   (4) Move the support assembly (7) above the tube ends of the upper LP turbine cooling air duct.
Subtask 75-24-49-480-054-A ** ON A/C NOT FOR ALL
I. Installation of the Upper LP Turbine Cooling Air Duct on to the Support Fixture
F LPT Cooling Air Duct and Support Fixture ** ON A/C NOT FOR ALL
   (1) Install the upper LP turbine cooling air duct (2) on to the IAE1M14084 FIXTURE, SUPPORT (5). Make sure that the tube ends are engaged correctly in their holes.
   (2) Safety the cooling air duct to the support fixture with the swing bolt (6), the knurled knob (1), the washer (3) and the screws (4).
Subtask 75-24-49-620-051-A ** ON A/C NOT FOR ALL
J. Installation of the Protective Plugs on to the Tube Openings
   (1) Install a IAE1M14077 PLUG, PROTECTIVE in to the front opening of the tube connector.
   (2) Install IAE1M14083 PLUG, PROTECTIVE in to the two rear openings of the tube connector.
   (3) Install IAE1M14083 PLUG, PROTECTIVE in to the openings of the upper and lower LP turbine cooling air ducts.
[Rev.10 from 2021] 2026.04.01 03:11:30 UTC
"Aviabrain" 2025