Removal of the Turbine CLG Manifold Assembly [IAE]

TASK 75-24-48-000-010-A
Removal of the Turbine CLG Manifold Assembly

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
This task gives the procedure for the removal of one or some of the Turbine CLG Manifold Assembly.
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)

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 26-12-17-000-010-A	Removal of the Core Fire Detectors
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 75-22-41-000-010-A	Removal of the No. 4 Bearing Compartment Air Cooler
TASK 75-23-49-000-010-A	Removal of the Turbine Cooling Air (TCA) Tubes
TASK 75-24-49-000-010-B	Removal of the Low Pressure (LP) Turbine Active Clearance Control (ACC) Manifold and Tubes
TASK 77-21-43-000-010-B	Removal of the Exhaust Gas Temperature (EGT) Harness and Junction Box (PRE SB 77-0015 and POST SB 77-0015)
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
No. 5 Bearing Oil Feed Tube
No. 5 Bearing Oil Scavenge Tube
Oil Weep Tube
P4.9 Pressure Rake Tube
Active Clearance Control Manifold
Active Clearance Control Manifold
Active Clearance Control Manifold
Turbine CLG Manifold Assembly
Active Clearance Control Manifold

3. Job Set-up
Subtask 75-24-48-941-051-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 75-24-48-010-052-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 to position.

Subtask 75-24-48-040-051-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 75-24-48-010-053-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 75-24-48-020-050-A ** ON A/C NOT FOR ALL

A. Remove the core zone fire detector (Ref. AMM TASK 26-12-17-000-010).

Subtask 75-24-48-020-051-B ** ON A/C NOT FOR ALL

B. Remove the ACC and the EGT Harness:
(1) Remove the Active Clearance Control (ACC) rear duct and the tube connector (Ref. AMM TASK 75-24-49-000-010).
(2) Remove the EGT harness (Ref. AMM TASK 77-21-43-000-010).

Subtask 75-24-48-020-052-A ** ON A/C NOT FOR ALL

C. Remove the No. 5 bearing oil feed tube.

No. 5 Bearing Oil Feed Tube ** ON A/C NOT FOR ALL

(1) Remove the bolt (11) and the washer (12) that attach the clip (13) at detail A.
(2) Remove the bolt (1), the washer (2) and the spacer (4) that attach the clips (3) and (5) at detail B.
(3) Disconnect the union (10) at the rearward end of the oil feed tube (9).
(4) Disconnect the union (6) at the forward end of the oil feed tube (9).
(5) Remove the oil feed tube (9).

Subtask 75-24-48-020-053-A ** ON A/C NOT FOR ALL

D. Remove the clipping points from the No. 5 bearing oil scavenge tube.

No. 5 Bearing Oil Scavenge Tube ** ON A/C NOT FOR ALL

(1) Remove the bolt (1) and the washer (2) that attach the clip (3) at detail A.
(2) Remove the bolt (4) and the washer (5) that attach the clip (6) at detail B.
(3) Remove the bolt (7) and the washer (8) that attach the clip (9) at detail C.

Subtask 75-24-48-020-054-A ** ON A/C NOT FOR ALL

E. Remove the No. 5 bearing oil scavenge tube.

No. 5 Bearing Oil Scavenge Tube ** ON A/C NOT FOR ALL

PRE SBE 79-0011

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Remove the lockwire and disconnect the union (14) at the forward end of the oil scavenge tube (13).

(2) Remove the lockwire, the four bolts (12) and the four nuts (10) from the rearward end of the oil scavenge tube (13).
(3) Remove the oil scavenge tube (13).
(4) Remove and discard the gasket (11).
END PRE SBE 79-0011

Subtask 75-24-48-020-055-A ** ON A/C NOT FOR ALL

F. Remove the No. 5 bearing scavenge oil tube.

No. 5 Bearing Oil Scavenge Tube ** ON A/C NOT FOR ALL

SBE 79-0011: Changed No. 5 Bearing Oil Scavenge Tube Attaching Parts.

(1) Remove the lockwire and disconnect the union (14) at the forward end of the oil scavenge tube (13).

(2) Remove the lockwire, the four bolts (12) and the two plates (15) from the rearward end of the oil scavenge tube (13).
(3) Remove the oil scavenge tube (13).
(4) Remove and discard the gasket (11).
END SBE 79-0011

Subtask 75-24-48-020-056-A ** ON A/C NOT FOR ALL

G. Remove the oil weep tube.

Oil Weep Tube ** ON A/C NOT FOR ALL

(1) Remove the bolt (2) and the washer (1) that attach the clip (3) at detail A.
(2) Remove the nut (14), the bolt (18) and the washer (17) that attach the clips (15) and (16) at detail B.
(3) Remove the nut (13), the washer (12), the spacers (10), (9) and (7), the washer (5) and the bolt (4) that attach the clips (6), (8) and (11) at detail C.
(4) Remove the nut (25), the bolt (22) and the washer (23) that attach the clip (24) at detail D.
(5) Disconnect the union (19) at the forward end of the oil weep tube (20).
(6) Disconnect the union (21) at the rearward end of the oil weep tube (20).
(7) Remove the oil weep tube (20).

Subtask 75-24-48-020-057-A ** ON A/C NOT FOR ALL

H. Remove the P4.9 pressure rake tube.

P4.9 Pressure Rake Tube ** ON A/C NOT FOR ALL

(1) Remove the nut (10), the bolt (4), the washer (5) and the spacers (7) and (9) that attach the clips (6) and (8) at detail A.
(2) Remove the nut (22), the washer (23) and the bolt (25) that attach the clip (24) at detail B.
(3) Remove the nut (21), the bolt (17) and the washer (18) that attach the clips (19) and (20) at detail D.
(4) Remove the nut (16), the bolt (11) and the washers (15) and (12) that attach the clips (13) and (14) at detail E.
(5) Disconnect the union (3) at the forward end of the pressure rake tube (2).
(6) Disconnect the union (1) at the rearward end of the pressure rake tube (2).
(7) Remove the pressure rake tube (2).

Subtask 75-24-48-020-058-A ** ON A/C NOT FOR ALL

I. Remove the No. 4 bearing compartment air cooler (Ref. AMM TASK 75-22-41-000-010).

Subtask 75-24-48-020-059-A ** ON A/C NOT FOR ALL

J. Remove the TCA tubes (Ref. AMM TASK 75-23-49-000-010).

Subtask 75-24-48-020-060-A ** ON A/C NOT FOR ALL

K. Remove the Right Turbine CLG Manifold and the Four TCC Tube Assemblies:
Pre SBE 75-0013
(1) Remove the right turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

(a) Remove the six bolts (12), (13), (19), (20), (46) and (51) that attach the right turbine CLG manifold assembly (1) to the brackets on the flange FM and the flange FN.
(b) Remove the right turbine CLG manifold assembly (1) from the engine.
(2) Remove the four TCC tube assemblies from the right turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

(a) Remove the twelve bolts (15), (23) and (50) and the twelve nuts (17), (21) and (47) that attach the four TCC tube assemblies (2), (3), (10) and (11) to the three brackets (14), (18) and (48).
(b) Remove the three brackets (14), (18) and (48) from the four TCC tube assemblies (2), (3), (10) and (11).
(c) Remove the twelve clips (16), (22) and (49) from the four TCC tube assemblies (2), (3), (10) and (11).
(d) Remove the four TCC tube assemblies (2), (3), (10) and (11).

Subtask 75-24-48-020-061-A ** ON A/C NOT FOR ALL

L. Remove the Right Turbine CLG Manifold and the Four TCC Tube Assemblies:
SBE 75-0013
(1) Remove the right turbine CLG manifold assembly

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

Turbine CLG Manifold Assembly ** ON A/C NOT FOR ALL

SBE 75-0013 : HPT ACC Tubes with improved maintainability features.
(a) Remove the four bolts (52) from the turbine CLG manifold assembly (4).
(b) Remove the four bolts (12), (13), (48) and (51) that attach the right turbine CLG manifold assembly (1) to the brackets on the flange FM and the flange FN.
(c) Remove the right turbine CLG manifold assembly (1) from the engine.
(2) Remove the four TCC tube assemblies from the right turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

Turbine CLG Manifold Assembly ** ON A/C NOT FOR ALL

SBE 75-0013: HPT ACC Tubes with improved maintainability features.
(a) Remove the eight bolts (15) and (50) and the eight nuts (17) and (47) that attach the four TCC tube assemblies (2), (3), (10) and (11) to the two brackets (14) and (48).
(b) Remove the two brackets (14) and (48) from the four TCC tube assemblies (2), (3), (10) and (11).
(c) Remove the eight clips (16) and (49) from the four TCC tube assemblies (2), (3), (10) and (11).
(d) Remove the four TCC tube assemblies (2), (3), (10) and (11).

Subtask 75-24-48-020-062-A ** ON A/C NOT FOR ALL

M. Remove the Left Turbine CLG Manifold and the Four TCC Tube Assemblies:
Pre SBE 75-0013
(1) Remove the left turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

(a) Remove the six bolts (29), (30), (35), (36), (43) and (44) that attach the left turbine CLG manifold assembly (6) to the brackets on the flange FM and the flange FN.
(b) Remove the left turbine CLG manifold assembly (6) from the engine.
(2) Remove the four TCC tube assemblies from the left turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

(a) Remove the twelve bolts (40), (33) and (39) and the twelve nuts (42), (31) and (37) that attach the four TCC tube assemblies (5), (7), (8) and (9) to the three brackets (28), (34) and (45).
(b) Remove the three brackets (28), (34) and (45) from the four TCC tube assemblies (5), (7), (8) and (9).
(c) Remove the twelve clips (32), (38) and (41) from the four TCC tube assemblies (5), (7), (8) and (9).
(d) Remove the four TCC tube assemblies (5), (7), (8) and (9).

Subtask 75-24-48-020-063-A ** ON A/C NOT FOR ALL

N. Remove the Left Turbine CLG Manifold and the Four TCC Tube Assemblies:
SBE 75-0013
(1) Remove the left turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

Turbine CLG Manifold Assembly ** ON A/C NOT FOR ALL

SBE 75-0013: HPT ACC Tubes with improved maintainability features.
(a) Remove the four bolts (53) from the turbine CLG manifold assembly (4).
(b) Remove the four bolts (35), (36), (43) and (44) that attach the left turbine CLG manifold assembly (6) to the brackets on the flange FM and the flange FN.
(c) Remove the left turbine CLG manifold assembly (6) from the engine.
(2) Remove the four TCC tube assemblies from the left turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

Turbine CLG Manifold Assembly ** ON A/C NOT FOR ALL

SBE 75-0013: HPT ACC Tubes with improved maintainability features.
(a) Remove the eight bolts (39) and (40) and the eight nuts (37) and (42) that attach the four TCC tube assemblies (5), (7), (8) and (9) to the two brackets (34) and (45).
(b) Remove the two brackets (34) and (45) from the four TCC tube assemblies (5), (7), (8) and (9).
(c) Remove the eight clips (38) and (41) from the four TCC tube assemblies (5), (7), (8) and (9).
(d) Remove the four TCC tube assemblies (5), (7), (8) and (9).
END SB 75-0013

Subtask 75-24-48-020-064-A ** ON A/C NOT FOR ALL

O. Remove the turbine CLG manifold assembly.

Active Clearance Control Manifold ** ON A/C NOT FOR ALL

Turbine CLG Manifold Assembly ** ON A/C NOT FOR ALL

(1) Remove the two clips (24) and the two bolts (25) that attach the turbine CLG manifold assembly (4) to the bracket on the flange FN.
(2) Remove the two bolts (26) and the two nuts (27) that attach the turbine CLG manifold assembly (4) to the bracket on the flange FM.
(3) Remove the turbine CLG manifold assembly (4) from the engine.

[Rev.10 from 2021] 2026.04.01 03:11:26 UTC