Replacement of the O-Rings of the Oil Supply and Guide Tubes [CFMB]

TASK 72-23-00-300-803-A
Replacement of the O-Rings of the Oil Supply and Guide 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.

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )
No specific	Torque wrench: range to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )
No specific	Torque wrench: range to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )
No specific	Torque wrench: range to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil
(Material No.CP5070)	vaseline

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
4	O-RING PREFORMED PACKING	AIPC 72-23-00-15-300
5	O-RINGS PREFORMED PACKING	AIPC 72-23-00-15-310
8	O-RINGS PREFORMED PACKING	AIPC 72-23-00-15-330

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-710-006-B	Minimum Idle Check
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 73-11-49-000-041-A	Removal of the Fuel Tubes
TASK 73-11-49-400-041-A	Installation of the Fuel Tubes
Replacement of the O-Rings of the Oil Supply and Guide Tubes

3. Job Set-up
Subtask 72-23-00-941-108-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five 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) in position to tell persons not to energize FADEC 1(2).

Subtask 72-23-00-010-139-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 72-23-00-020-068-A ** ON A/C NOT FOR ALL

A. Remove the fuel tubes (Ref. AMM TASK 73-11-49-000-041).

Subtask 72-23-00-390-053-A ** ON A/C NOT FOR ALL

B. Replacement of the O-rings of the Oil Supply and Guide Tubes
(1) Removal of the oil supply and guide tubes
(a) Disconnect the oil pressure-sensor tube (10) from the oil supply tube (6).
(b) Disconnect the front bearing oil-supply-tube (3).
(c) Loosen the union nut between flanges F and G at the 9 o'clock position.
(d) Loosen the bolts (1) and (2) from the front bearing oil-supply-tube (3) to get sufficient clearance for the oil supply tube (6) removal.
(e) Remove the bolts (7) and oil supply tube (6).
(f) Remove and discard the O-rings (4) and (5) from the oil supply tube (6).
(g) Remove the guide tube (9).
(h) Remove and discard the O-rings (8).
(2) Installation of the oil supply and guide tubes with the new O-rings

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

(a) Lightly coat the new AIPC 72-23-00-15-330 O-RINGS PREFORMED PACKING (8) with vaseline (Material No.CP5070) .
(b) Install the O-rings preformed packing (8) in the grooves of the guide tube (9).
(c) Lightly coat the new AIPC 72-23-00-15-300 O-RING PREFORMED PACKING (4) and the AIPC 72-23-00-15-310 O-RINGS PREFORMED PACKING (5) with vaseline (Material No.CP5070) .
(d) Install the O-ring preformed packing (4) and the O-rings preformed packing (5) in the grooves of the oil supply tube (6).
(e) Do a visual check of the inside strut No. 10 to make sure that there is no blockage and that the area is clean.
(f) Installation of the guide tube assembly and the oil supply tube

CAUTION: ENGAGE THE GUIDE TUBE AND THE OIL SUPPLY TUBE CAREFULLY TO PREVENT DAMAGE TO THE O-RINGS.

1 Engage the guide tube assembly (9) in strut No. 10.
2 Install the oil supply tube (6) in the guide tube (9).
(g) Lightly coat the threads of the bolts (7) with vaseline (Material No.CP5070) .
(h) Install the bolts (7) to safety the elbow.
(i) TORQUE the bolts (7) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN )

.
(j) Installation of the front bearing oil-supply-tube (3)
1 Lightly coat the union nut with engine oil (Material No.CP2442) .
2 Re-install the front bearing oil-supply-tube (3) in its initial position.
3 Connect the front bearing oil-supply-tube (3).
4 TORQUE the union nut to between 550 and 450 lbf.in (6.22 and 5.09 m.daN )

between flanges F and G at the 9 o'clock position.
(k) TORQUE the bolts (1) and (2) to between 53 and 47 lbf.in (0.60 and 0.53 m.daN )

on the front bearing oil-supply-tube (3).
(l) Connection of the oil pressure-sensor tube (10)
1 Lightly coat the union nut with engine oil (Material No.CP2442) .
2 Re-connect the oil pressure-sensor tube (10) on the oil supply tube (6).
3 TORQUE the union nut to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )

Subtask 72-23-00-420-076-A ** ON A/C NOT FOR ALL

C. Install the fuel tubes (Ref. AMM TASK 73-11-49-400-041).

Subtask 72-23-00-710-051-A ** ON A/C NOT FOR ALL

D. Do the minimum idle check (Ref. AMM TASK 71-00-00-710-006).

5. Close-up
Subtask 72-23-00-410-132-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 fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:42:06 UTC