Installation of the Filter Clogging Indicator [CFMB]

TASK 78-31-51-400-043-A
Installation of the Filter Clogging Indicator

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 150.36 and 132.72 lbf.in (1.70 and 1.50 m.daN )
CH1540-0276	1	SOCKET
M46104	1	SOCKET

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1039)	acetone
(Material No.CP1041)	isopropyl alcohol
(Material No.CP2011)	stoddard solvent
(Material No.CP2212)	hydraulic fluid NSA-307-110 type 4
(Material No.CP2559)	ardrox 552
(Material No.CP2560)	turco ind 79
(Material No.CP2566)	mag-chem teksol
(Material No.CP2584)	degreasol 99 R
(Material No.CP2656)	mag-chem skysol
(Material No.CP8001)	lockwire 0.032 in. (0.8 mm) dia.
(Material No.CP8002)	lockwire 0.032 in. (0.8 mm) dia

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
200	PACKING	AIPC 78-31-51-02-270
205	PACKING	AIPC 78-31-51-02-280

E. Referenced Information

REFERENCE	DESIGNATION
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
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 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-30-00-710-040-B	Thrust Reverser Hydraulic System Bleed Procedure
Hydraulic Control Unit Filter Clogging Indicator

3. Job Set-up
Subtask 78-31-51-860-055-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 78-31-51-010-077-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

Subtask 78-31-51-040-067-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 78-31-51-420-063-A ** ON A/C NOT FOR ALL

A. Installation of the Filter Clogging Indicator
(1) Lubricate the new preformed packings (200) and (205) with hydraulic fluid NSA-307-110 type 4 (Material No.CP2212) .
(2) Put the AIPC 78-31-51-02-270 PACKING (200) on the clogging indicator (195).
(3) Put the AIPC 78-31-51-02-280 PACKING (205) on the clogging indicator (195).
(4) Use the CH1540-0276 SOCKET or M46104 SOCKET and install the clogging indicator (195) in the clogging indicator port of the HCU (20).
(5) TORQUE the clogging indicator (195) to between 150.36 and 132.72 lbf.in (1.70 and 1.50 m.daN )

.
(6) Install the glass bowl (190) and the retaining ring (185) on the clogging indicator (195).
(7) Safety the retaining ring (185) with CP8001lockwire 0.032 in. (0.8 mm) dia. or CP8002lockwire 0.032 in. (0.8 mm) dia.

5. Close-up
Subtask 78-31-51-100-052-A ** ON A/C NOT FOR ALL

A. If hydraulic fluid has come in contact with any titanium part, clean the part as follows:
(1) Wipe off the affected area with a clean, dry cloth or paper towel.

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

(2) Wipe the affected area with a clean, dry cloth or paper towel made moist with isopropyl alcohol (Material No.CP1041) or acetone (Material No.CP1039) or stoddard solvent (Material No.CP2011) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) .
(3) Dry the area with a clean, dry cloth or paper towel.

Subtask 78-31-51-410-071-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.

Subtask 78-31-51-440-062-A ** ON A/C NOT FOR ALL

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

Subtask 78-31-51-410-072-A ** ON A/C NOT FOR ALL

D. Close Access
(1) 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
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 78-31-51-614-057-A ** ON A/C NOT FOR ALL

E. Pressurize the aircraft hydraulic systems.
(1) For engine 1 pressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
(2) For engine 2 pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).

Subtask 78-31-51-710-057-A ** ON A/C NOT FOR ALL

F. Bleed the air from the thrust reverser hydraulic system (Ref. AMM TASK 78-30-00-710-040).

[Rev.10 from 2021] 2026.04.01 13:11:52 UTC