Installation of the Fuel Strainer Differential Pressure Sensor [CFML]

TASK 73-34-10-400-801-A
Installation of the Fuel Strainer Differential Pressure Sensor

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.

FIN: 4081KS

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 123.9 and 112.1 lbf.in (1.40 and 1.27 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	RETAINER PACKINGS	EIPC 73-34-10-01-030
6	PREFORMED PACKING	EIPC 73-34-10-01-040
7	PREFORMED PACKING	EIPC 73-34-10-01-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-700-805-A	Dry-Motoring Check
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-802-A	FADEC Test (Menu Mode)
Fuel Strainer Differential Pressure Sensor

3. Job Set-up
Subtask 73-34-10-941-051-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 73-34-10-010-052-A

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

4. Procedure
Subtask 73-34-10-420-050-A

A. Installation of the Fuel Strainer Differential Pressure Sensor
(1) Remove all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.
(2) Make sure that the mating surfaces are clean and clear of unwanted materials.
(3) Lubrication of the bolts and packings

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

(a) Lubricate the threads of the two bolts (4) and the two new EIPC 73-34-10-01-030 RETAINER PACKINGS (5), the new EIPC 73-34-10-01-040 PREFORMED PACKING (6) and the new EIPC 73-34-10-01-050 PREFORMED PACKING (7) with the engine oil (Material No.CP2442)
(4) Install the two new retainer packings (5), the new preformed packing (6) and the new preformed packing (7) in the groove of the fuel strainer differential pressure sensor (1).
(5) Install the fuel strainer differential pressure sensor (1) on the Fuel Metering Unit (FMU) (2).
(6) Install the two bolts (4) to attach the fuel strainer differential pressure sensor (1) on the FMU (2) and tighten it with your hand.
(7) TORQUE the two bolts (4) to between 123.9 and 112.1 lbf.in (1.40 and 1.27 m.daN )

.
(8) Connect the HJ6A harness electrical connector (3) as follows:

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS FOR THE FMU AND THE FUEL STRAINER DIFFERENTIAL PRESSURE SENSOR ARE CONNECTED TO THE CORRECT HARNESSES. IF THEY ARE NOT, FAULTS OF THE FMV, FUEL STRAINER DELTA PRESSURE, TCMA AND EOS CAN OCCUR DURING THE IDLE TEST.

(a) Connect the HJ6A harness electrical connector (3) to the fuel strainer differential pressure sensor (1).

5. Close-up
Subtask 73-34-10-700-050-A

A. Tests
(1) Remove the access platform(s).
(2) FADEC test (Ref. AMM TASK 73-29-00-710-802).
(3) Dry-motoring check (Ref. AMM TASK 71-00-00-700-805).

Subtask 73-34-10-410-050-A

B. 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 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:07:05 UTC