Installation of the Diffuser Case Tubes Seal Rings from an Assembled Engine [IAE]

TASK 72-42-10-400-001-A
Installation of the Diffuser Case Tubes Seal Rings from an Assembled Engine

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

ZONE: 400
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	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 85 and 65 lbf.in (0.96 and 0.73 m.daN )
No specific	Torque wrench: range to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )
No specific	Torque wrench: range to between 212 and 195 lbf.in (2.40 and 2.20 m.daN )
No specific	Torque wrench: range to between 283 and 257 lbf.in (3.20 and 2.90 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-126)	lockwire
(Material No.V02-141)	corrosion resistant steel lockwire

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	THRUST WIRE	AIPC 72-42-10-80-010
2	GASKET	AIPC 72-42-10-80-060
1	SEAL RINGS	AIPC 72-42-10-80-070
7	THRUST WIRE	AIPC 72-42-10-80-080
2	GASKET	AIPC 72-42-10-80-140
1	SEAL RINGS	AIPC 72-42-10-80-150
3	THRUST WIRE	AIPC 72-42-10-80-180
7	GASKET	AIPC 72-42-10-80-230
6	SEAL RINGS	AIPC 72-42-10-80-240

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-40-11-911-012-A	General Instructions for the Uses of Lockwire
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 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
Bearing Pressure Tube Seal Rings
Remove the Turbine Cooling Air Duct Airframe Sensing Tube Seal Rings (PRE SBE 72-0166)
Bearing Airframe Tube Seal Rings

3. Job Set-up
Subtask 72-42-10-860-050-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 1M(3 FT) is in position.

Subtask 72-42-10-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 72-42-10-040-051-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 72-42-10-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Diffuser Case Tubes Seal Rings
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Connect the No. 4 bearing oil pressure tube at approximately the seven o'clock position on the diffuser case.
(a) Install the two AIPC 72-42-10-80-070 SEAL RINGS (1), to the grooves on the outer end of the tube. Splits in seal rings should be 180 degrees apart.
(b) Install the AIPC 72-42-10-80-060 GASKET (2) to the pad on the outer surface of the diffuser case over the No. 4 bearing pressure tube.

NOTE: Gasket can be installed with the compression feature in either direction.

(c) Install the sealing sleeve (3) over the tube and against the gasket.
(d) Install the retaining plate (4) over the outer end of the tube and against the sealing sleeve.
(e) Install the three bolts (7) to hold the gasket, sleeve and plate in position. TORQUE the bolts to between 85 and 65 lbf.in (0.96 and 0.73 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) Safety the three bolts (7) with corrosion resistant steel lockwire (Material No.V02-141) (Ref. AMM TASK 70-40-11-911-012).
(g) Install the coupling nut (6) to the outer end of the pressure tube and lock in place with the AIPC 72-42-10-80-010 THRUST WIRE (5).
(h) Attach the oil feed tube to the coupling nut (6) on the outer end of the No. 4 bearing pressure tube. TORQUE the coupling nut (6) to between 283 and 257 lbf.in (3.20 and 2.90 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(i) Safety the oil feed tube (8) to the coupling nut (6) and the thrust wire (5) with lockwire (Material No.V02-126) (Ref. AMM TASK 70-40-11-911-012).

PRE SBE 72-0166

CAUTION: TAKE PRECAUTIONS TO PREVENT THAT THE SEAL RINGS DO NOT FALL INTO THE ENGINE.

(4) Connect the turbine cooling air sensing tube at approximately the one o'clock position on the diffuser case

Remove the Turbine Cooling Air Duct Airframe Sensing Tube Seal Rings (PRE SBE 72-0166) ** ON A/C NOT FOR ALL

NOTE: The tube is not required to SBE 72-0166.

(a) Install the AIPC 72-42-10-80-240 SEAL RINGS (6) to the grooves on the outer end of the tube. Splits in seal rings should be 180 degrees apart.
(b) Install the AIPC 72-42-10-80-230 GASKET (7) to the pad on the outer surface of the diffuser case over the turbine cooling air sensing tube.

NOTE: Gasket can be installed with the compression feature in either direction.

(c) Install the sealing sleeve (5) over the tube and against the gasket.
(d) Install the retaining plate (4) over the tube and against the sealing sleeve.
(e) Install the three bolts (8) to hold the gasket, sleeve and plate in position. TORQUE the bolts to between 85 and 65 lbf.in (0.96 and 0.73 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) Safety the three bolts (8) with corrosion resistant steel lockwire (Material No.V02-141) (Ref. AMM TASK 70-40-11-911-012).
(g) Install the coupling nut (2) to the outer end of the sensing tube and lock in place with AIPC 72-42-10-80-180 THRUST WIRE (3).
(h) Install the tube union (9) to the coupling nut (2) on the outer end of the turbine cooling air duct sensing tube. TORQUE the coupling nut (2) to between 212 and 195 lbf.in (2.40 and 2.20 m.daN )

(Ref. AMM TASK 70-23-11-911-013). Hold the tube union (9) with a wrench, so it will not turn.
(i) Install the nut assembly (1) to the tube union (9) on the outer end of the turbine cooling air duct sensing tube. TORQUE the nut assembly (1) to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(j) Safety the nut assembly (1) with corrosion resistant steel lockwire (Material No.V02-141) (Ref. AMM TASK 70-40-11-911-012).

END OF SBE 72-0166

(5) Connect the No. 4 bearing airframe tube at approximately the six o'clock position on the diffuser case.
(a) Install the two AIPC 72-42-10-80-150 SEAL RINGS (1), to the grooves on the outer end of the tube. Splits in seal rings should be 180 degrees apart.
(b) Install the AIPC 72-42-10-80-140 GASKET (2) to the pad on the outer surface of the diffuser case over the No. 4 bearing airframe tube.

NOTE: Gasket can be installed with the compression feature in either direction.

(c) Install the sealing sleeve (3) over the tube and against the gasket.
(d) Install the retaining plate (4) over the tube and against the sealing sleeve.
(e) Install the three bolts (5) to hold the gasket, sleeve and plate in position. TORQUE the bolts to between 85 and 65 lbf.in (0.96 and 0.73 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) Safety the three bolts (5) with corrosion resistant steel lockwire (Material No.V02-141) (Ref. AMM TASK 70-40-11-911-012).
(g) Install the coupling nut (8) to the outer end of the airframe tube and lock in place with the AIPC 72-42-10-80-080 THRUST WIRE (7).
(h) Attach the A/O No. 4 oil weep tube (6) to the coupling nut (8) on the outer end of the No. 4 bearing airframe tube. TORQUE the coupling nut (8) to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(i) Safety the A/O No. 4 oil weep tube (6) to the coupling nut (8) and the thrust wire (7) with lockwire (Material No.V02-126) (Ref. AMM TASK 70-40-11-911-012).

5. Close-up
Subtask 72-42-10-410-050-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) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 72-42-10-440-050-A ** ON A/C NOT FOR ALL

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

Subtask 72-42-10-410-051-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 72-42-10-790-050-B ** ON A/C NOT FOR ALL

D. Do a leak check of the oil system (Ref. AMM TASK 71-00-00-710-012). Leaks are not permitted.

[Rev.10 from 2021] 2026.04.01 02:46:22 UTC