Cleaning of No. 5 Bearing Oil Service Lines, Filter and Oil Jet [IAE]

TASK 72-50-50-100-010-B
Cleaning of No. 5 Bearing Oil Service Lines, Filter and Oil Jet

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	PICK UP TOOL - MAGNETIC
No specific	1	VACUUM CLEANER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 40 and 35 lbf.in (0.45 and 0.40 m.daN )
No specific	Torque wrench: range to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
No specific	Torque wrench: range to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
No specific	Torque wrench: range to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )
No specific	Torque wrench: range to between 250 and 225 lbf.in (2.83 and 2.54 m.daN )
No specific	Torque wrench: range to between 350 and 320 lbf.in (3.96 and 3.62 m.daN )
No specific	Torque wrench: range to between 1.18 and 0.96 m.daN (104.42 and 84.96 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-454)	carbon removal alkaline gel
(Material No.V01-455)	carbon remover alkaline gel
(Material No.V01-456)	carbon remover alkaline gel
(Material No.V02-119)	corrosion resistant steel lockwire

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
9	THRUST WIRE	AIPC 72-50-53-80-100
3	THRUST WIRE	AIPC 72-50-53-81-050
3	SEALING RING	AIPC 72-58-02-80-050
7	O-RING	AIPC 72-58-02-80-070
5	FILTER	AIPC 79-21-49-93-060
3	O-RING	AIPC 79-21-49-93-070
3	O-RING	AIPC 79-22-49-80-030

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
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 72-51-41-000-010-B	Removal of the No.5 Bearing Compartment Cover
TASK 72-51-41-400-010-B	Installation of the No.5 Bearing Compartment Cover
TASK 78-11-12-000-010-A	Removal of the Engine Exhaust Cone
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
No. 5 Bearing Oil Feed Tube
No. 5 Bearing Oil Scavenge Tube
Illustration of the Oil scavenge Tube of the No. 5 Bearing
Illustration of the Oil Feed Tube of the No. 5 Bearing
Oil Jet and Filter of the No. 5 Bearing
Illustration of the No. 5 Bearing Oil Feed Tube
Illustration of the No. 5 Bearing Oil scavenge Tube
Turbine Exhaust Case (TEC) Oil Passage Areas

3. Job Set-up
Subtask 72-50-50-941-051-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 72-50-50-010-055-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 position.

Subtask 72-50-50-040-051-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 72-50-50-010-057-A ** ON A/C NOT FOR ALL

D. Remove the Exhaust Cone (Ref. AMM TASK 78-11-12-000-010)

Subtask 72-50-50-010-058-A ** ON A/C NOT FOR ALL

E. Remove the No. 5 Bearing Compartment Cover (Ref. AMM TASK 72-51-41-000-010).

4. Procedure
Subtask 72-50-50-020-054-A ** ON A/C NOT FOR ALL

A. Disconnect Tube 1, No. 5 Bearing Oil Feed Tube.

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

(1) Loosen the nuts, bolts, washers, spacers, clip nuts and clips from clip location 5206.
(2) Disconnect tube 1 from the outer oil feed tube:
(a) Remove the two bolts (2) and the two nuts (4) from the flange connection.
(b) Remove and discard the O-ring (3).
(c) Remove the oil filter (5).

Subtask 72-50-50-020-055-A ** ON A/C NOT FOR ALL

B. Disconnect Tube 2, No. 5 Bearing Oil Scavenge Tube.

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

(1) Loosen the nuts, bolts, washers, spacers, clip nuts and clips from clip location 5228.
(2) Disconnect tube 2 from the outer oil scavenge tube:
(a) Remove the four bolts (5) and the two threaded plates (4) from the flange connection.
(3) Remove and discard the O-ring (3).

Subtask 72-50-50-020-056-A ** ON A/C NOT FOR ALL

C. Remove the Oil Scavenge Tube.

Illustration of the Oil scavenge Tube of the No. 5 Bearing ** ON A/C NOT FOR ALL

(1) Remove the bolts (6) and (9), the nuts (5) and (8) which attach the bracket (7) to the oil scavenge tube (1) and to the rear extrenal flange of the turbine exhaust case.
(2) Remove the bracket (7).
(3) Disconnect the scavenge tube nut (2) at the elbow (4) and remove the elbow.
(4) Remove the AIPC 72-50-53-81-050 THRUST WIRE (3) and discard it.
(5) Remove the tube nut (2) from the scavenge tube (1).
(6) Remove the nut (15), the bolt (10) and the washers (11) and (16) that attach the heat shields (17) to the inner support bracket (12).
(7) Cut, remove and discard the lock wire that attach the two heat shield halves (17) together and remove the heat shields.
(8) Remove the nuts (13) and bolts (14) that attach the inner support bracket (12) to the turbine exhaust case.
(9) Remove the inner support bracket (12).
(10) Disconnect the scavenge tube nut (19) at the adapter (18).
(11) Remove the oil scavenge tube from the turbine exhaust case.

Subtask 72-50-50-020-057-A ** ON A/C NOT FOR ALL

D. Remove the Oil Feed Tube of the No. 5 Bearing.

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

(1) Remove the nuts (1) and (2) and the bolts (5) and (6) that attach the bracket (3) to the external flange of the turbine exhaust case.
(2) Remove the clamp (4) and the bracket (3).
(3) Disconnect the tube nut (8) at the elbow.
(4) Remove the AIPC 72-50-53-80-100 THRUST WIRE (9) and discard it.
(5) Remove the nut (13), bolt (18) and washers (14) and (19) that attach the heat shields (12) to the inner support bracket (16).
(6) Cut, remove and discard the lockwire that attaches the two heat shield halves (12) together, and remove the heat shields.
(7) Remove the nuts (15) and the bolts (17) that attach the inner support bracket (16) to the turbine exhaust case.
(8) Remove the inner support bracket (16).
(9) Disconnect the tube nut (10) from the adapter (11).
(10) Remove the oil feed tube from the turbine exhaust case.

Subtask 72-50-50-010-059-A ** ON A/C NOT FOR ALL

E. Remove the Oil Jet and Transfer Tube of the No. 5 Bearing.

Oil Jet and Filter of the No. 5 Bearing ** ON A/C NOT FOR ALL

(1) Remove the bolts (5) and the lockwashers (6).
(2) Remove the oil transfer tube (4) and discard the O-rings (3).
(3) Remove the bolts (1) and remove the oil jet (2) and discard the O-ring (7).

Subtask 72-50-50-160-051-A ** ON A/C NOT FOR ALL

F. Clean the No. 5 Oil Service Tubes.

CAUTION: DO NOT USE THIS PROCEDURE ON CARBON SEALS OR ENGINE BEARINGS.

(1) Using borescope equipment, inspect the oil pressure and scavenge tubes for internal carbon build-up. No carbon build-up is allowed.
(2) Apply the carbon removal alkaline gel (Material No.V01-454) 100 percent by volume, at ambient temperature, into the tubes. Make sure that the tubes are full.

NOTE: The carbon remover alkaline gel (Material No.V01-455) or carbon remover alkaline gel (Material No.V01-456) may also be used.

(3) Plug the tubes.
(4) Let soak for 1 to 12 hours depending on the amount of contamination.
(5) Flush the tubes fully with cold or hot water pressure spray. Use the adapters and the draining hoses on the inner flanges of the oil scavenge and oil pressure tubes.
(6) Inspect the tubes for carbon, using borescope equipment. No remaining carbon build-up is allowed.
(7) Repeat steps (3) thru (7) as necessary. The maximum allowable soak time for the tubes is 24 hours.

Subtask 72-50-50-210-053-A ** ON A/C NOT FOR ALL

G. Inspect the Oil Feed Tube 1 and the Oil Scavenge Tube 2.

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

Illustration of the No. 5 Bearing Oil scavenge Tube ** ON A/C NOT FOR ALL

(1) Using borescope equipment, inspect the oil feed tube. No carbon build up is allowed. Clean the tube per step F. if necessary.
(2) Using borescope equipment, inspect the oil scavenge tube. No carbon build up is allowed. Clean the tube per step F. if necessary.

Subtask 72-50-50-210-054-A ** ON A/C NOT FOR ALL

H. Inspect the Oil Jet and the Transfer Tube.

Oil Jet and Filter of the No. 5 Bearing ** ON A/C NOT FOR ALL

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

(1) Inspect the oil jet and the transfer tube. No contamination is allowed. Clean as necessary.
(2) Inspect the filter (5). No contamination is allowed. Clean as necessary.

Subtask 72-50-50-210-055-A ** ON A/C NOT FOR ALL

I. Inspect the No. 5 Bearing Compartment for Contamination.

Oil Jet and Filter of the No. 5 Bearing ** ON A/C NOT FOR ALL

Turbine Exhaust Case (TEC) Oil Passage Areas ** ON A/C NOT FOR ALL

(1) Do a visual inspection of the rear end of the No. 5 compartment and the transfer tube for contamination. No contamination is allowed.
(2) Inspect for blockage in the oil flow (pressure and scavenge) passage areas of the Turbine Exhaust Case (TEC) assembly. For the location, refer to the figure:

Turbine Exhaust Case (TEC) Oil Passage Areas ** ON A/C NOT FOR ALL

(a) If the blockage is confirmed, carefully clean using an appropriate PICK UP TOOL - MAGNETIC and VACUUM CLEANER to remove all the debris from the oil passage.

Subtask 72-50-50-420-055-A ** ON A/C NOT FOR ALL

J. Install the Oil Jet and Transfer Tube of the No. 5 Bearing.

Oil Jet and Filter of the No. 5 Bearing ** ON A/C NOT FOR ALL

(1) Install the AIPC 72-58-02-80-050 SEALING RING (3) (3 off) on both ends of the oil transfer tube (4).
(2) Install the AIPC 72-58-02-80-070 O-RING (7) on the oil jet (2).
(3) Install the oil jet (2) with the bolts (1).
(4) TORQUE the bolts (1) to between 1.18 and 0.96 m.daN (104.42 and 84.96 lbf.in )

.
(5) Insert the transfer tube (4) into the oil jet (2).
(6) Install the bolts (5) and the lockwashers (6).
(7) TORQUE the bolts (5) to between 1.18 and 0.96 m.daN (104.42 and 84.96 lbf.in )

Subtask 72-50-50-420-056-A ** ON A/C NOT FOR ALL

K. Install the Oil Feed Tube of the No. 5 Bearing.

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

(1) Install the oil feed tube into the exhaust case strut and connect the tube nut (10) to the adapter (11), hand-tighten only.
(2) Attach the tube nut (8) to the oil feed tube with the AIPC 72-50-53-80-100 THRUST WIRE (9).
(3) Install the bracket (3) on the external flange of the exhaust case with the bolts (6) and the nuts (1), hand-tighten only.
(4) Connect the elbow (7) to the oil feed tube nut (8).
(5) Install the clamp (4) on the elbow (7) with the bolt (5) and the nut (2), hand-tighten only.
(6) Make sure that the oil feed tube is in the center of the exhaust case opening before you continue with the following steps.
(7) TORQUE the tube nut (10) to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(8) Secure the tube nut (10) with corrosion resistant steel lockwire (Material No.V02-119) .
(9) TORQUE the tube nut (8) to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(10) Secure the tube nut (8) with corrosion resistant steel lockwire (Material No.V02-119) .
(11) TORQUE the nuts (1) and (2) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )

.
(12) Install the inner support bracket (16) on the exhaust case and secure with the bolts (17) and the nuts (15).
(13) TORQUE the nuts (15) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )

.
(14) Install the heat shield halves (12) on the oil feed tube.
(15) Install the bolt (18), washers (14) and (19) and nut (13) to attach the heat shield to the inner support bracket (16).
(16) TORQUE the nut (13) to between 40 and 35 lbf.in (0.45 and 0.40 m.daN )

(17) Secure the heat shield halves (12) together with corrosion resistant steel lockwire (Material No.V02-119) .

Subtask 72-50-50-420-057-A ** ON A/C NOT FOR ALL

L. Install the Oil Scavenge Tube of the No. 5 Bearing.

Illustration of the Oil scavenge Tube of the No. 5 Bearing ** ON A/C NOT FOR ALL

(1) Install the oil scavenge tube (1) into the exhaust case strut and connect the tube nut (19) to the adapter (18), hand-tighten only.
(2) Attach the tube nut (2) to the oil scavenge tube (1) with the AIPC 72-50-53-81-050 THRUST WIRE (3).
(3) Install the bracket (7) on the external flange of the exhaust case with the bolts (6) and the nuts (8), hand-tighten only.
(4) Connect the elbow (4) to the tube nut (2).
(5) Attach the opposite end of the elbow (4) to the bracket (7) with the bolt (9) and the nut (5), hand-tighten only.
(6) Make sure that the oil scavenge tube is in the center of the opening of the exhaust case before you continue with the following steps.
(7) TORQUE the tube nut (19) to between 250 and 225 lbf.in (2.83 and 2.54 m.daN )

.
(8) Secure the tube nut (19) with corrosion resistant steel lockwire (Material No.V02-119) .
(9) TORQUE the tube nut (2) to between 350 and 320 lbf.in (3.96 and 3.62 m.daN )

.
(10) Secure the tube nut (2) with corrosion resistant steel lockwire (Material No.V02-119) .
(11) TORQUE the nuts (5) and (8) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )

.
(12) Install the inner support bracket (12) on the exhaust case and secure with the bolts (14) and the nuts (13).
(13) TORQUE the nuts (13) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )

.
(14) Install the heat shield halves (17) on the oil scavenge tube.
(15) Install the bolt (10), washers (11) and (16) and nut (15) to attach the heat shield to the inner support bracket (12).
(16) TORQUE the nut (15) to between 40 and 35 lbf.in (0.45 and 0.40 m.daN )

.
(17) Secure the heat shield halves (17) together with corrosion resistant steel lockwire (Material No.V02-119) .

Subtask 72-50-50-420-058-A ** ON A/C NOT FOR ALL

M. Connect Tube 2 of the No. 5 Bearing Oil Scavenge Tube.

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

Illustration of the Oil scavenge Tube of the No. 5 Bearing ** ON A/C NOT FOR ALL

(1) Connect tube 2 to the outer oil scavenge tube flange:
(a) Put the AIPC 79-22-49-80-030 O-RING (3) into the correct position.
(b) Install the four bolts (5) and the two threaded plates (4).
(c) TORQUE the nuts to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

.
(d) Secure the bolts with corrosion resistant steel lockwire (Material No.V02-119) .
(2) Install the clips, clip nuts, bolts and washers at clip position 5228. TORQUE the bolts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

Subtask 72-50-50-420-059-A ** ON A/C NOT FOR ALL

N. Connect Tube 1 of the No. 5 Bearing Oil Feed Tube.

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

(1) Connect tube 1 to the outer oil feed tube flange.
(a) Put the AIPC 79-21-49-93-070 O-RING (3) and the AIPC 79-21-49-93-060 FILTER (5) in the correct position.
(b) Install the two bolts (2) and the two nuts (4).
(c) TORQUE the nuts (4) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

.
(2) Attach the clips, clip nuts, bolts and washers at clip position 5206. TORQUE the bolts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

5. Close-up
Subtask 72-50-50-942-054-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 exhaust cone (Ref. AMM TASK 78-11-12-400-010).

Subtask 72-50-50-942-056-A ** ON A/C NOT FOR ALL

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

Subtask 72-50-50-942-057-A ** ON A/C NOT FOR ALL

C. 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).
(3) Remove the access platform(s).

Subtask 72-50-50-710-051-A ** ON A/C NOT FOR ALL

D. Do an oil leak test (Ref. AMM TASK 71-00-00-710-012).

[Rev.10 from 2021] 2026.04.01 02:46:32 UTC