Installation of the Downstream Filter [CFMI]

TASK 73-11-45-400-040-A
Installation of the Downstream Filter

1. Reason for the Job

NOTE: This task is only applicable POST SB CFM 73-149

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 51 and 47 lbf.in (0.58 and 0.53 m.daN )
No specific	Torque wrench: range to between 110 and 98 lbf.in (1.24 and 1.11 m.daN )
No specific	Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )
No specific	Torque wrench: range to between 770 and 650 lbf.in (8.70 and 7.35 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease
(Material No.CP2422)	engine oil
(Material No.CP2442)	engine oil

C. 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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
80	GASKET	AIPC 73-31-10-01-240
50	GASKET	AIPC 73-31-10-01-270

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-710-006-A	Minimum Idle Check
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
R/I Downstream Filter

3. Job Set-up
Subtask 73-11-45-860-054-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).

Subtask 73-11-45-010-062-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(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 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-11-45-040-057-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 73-11-45-420-053-A ** ON A/C NOT FOR ALL

A. Installation of the Fuel Nozzle Filter
(1) Place the fuel nozzle filter (120).
(2) Install the 3 bolts (100), the 3 washers (130) and the 3 nuts (110). Tighten nuts (110) by hand.
(3) TORQUE nuts (110) to between 110 and 98 lbf.in (1.24 and 1.11 m.daN )

.
(4) Lightly coat new AIPC 73-31-10-01-240 GASKET (80) with engine oil (Material No.CP2442) . Lightly coat 4 bolts (70) with graphite grease (Material No.CP2101) .
(5) Put the fuel tube (90) in its correct position on the fuel outlet port of the fuel nozzle filter (120). Engage the gasket (80) between the square flange of fuel tube (90) and the fuel nozzle filter (120).
(6) Install the 4 bolts (70) and ensure that the bolts engage freely by hand as follows:

NOTE: The use of tools is not allowed.

(a) Hold the bolt head between your fingers, and rotate each bolt by at least five complete turns. If the insert is in good condition, it should not be possible to fully hand tighten the bolt. If the insert is not in good condition, replace the fuel nozzle filter (120).
(7) TORQUE bolts (70) to between 51 and 47 lbf.in (0.58 and 0.53 m.daN )

.
(8) Lightly coat new AIPC 73-31-10-01-270 GASKET (50) with engine oil (Material No.CP2422) . Lightly coat 4 bolts (40) with graphite grease (Material No.CP2101) .
(9) Put the fuel hose/tube (60) in its correct position on the fuel inlet port of the fuel nozzle filter (120). Engage the gasket (50) between the square flange of fuel hose/tube (60) and the fuel nozzle filter (120).
(10) Install the 4 bolts (40) and ensure that the bolts engage freely by hand as follows:

NOTE: The use of tools is not allowed.

(a) Hold the bolt head between your fingers, and rotate each bolt by at least five complete turns. If the insert is in good condition, it should not be possible to fully hand tighten the bolt. If the insert is not in good condition, replace the fuel nozzle filter (120).
(11) TORQUE bolts (40) to between 51 and 47 lbf.in (0.58 and 0.53 m.daN )

.
(12) Connect the fuel LPTACC hose (30) and TORQUE the coupling nut to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

.
(13) Connect the fuel HPTACC hose (20) and TORQUE the coupling nut to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

.
(14) Connect the fuel out hose (10) to the servo fuel heater and TORQUE the coupling nut to between 770 and 650 lbf.in (8.70 and 7.35 m.daN )

Subtask 73-11-45-710-053-A ** ON A/C NOT FOR ALL

B. Do a minimum idle check and check for leaks. No leakage permitted (Ref. AMM TASK 71-00-00-710-006).

5. Close-up
Subtask 73-11-45-410-056-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 doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-11-45-440-054-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 73-11-45-410-057-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:55:35 UTC