Installation of the Engine Oil Low Pressure Switch [CFML]

TASK 79-34-15-400-802-A
Installation of the Engine Oil Low Pressure Switch

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: 5000KS

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 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )
No specific	Torque wrench: range to between 1.70 and 1.53 m.daN (12.54 and 11.28 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	LUBRICATING OIL TURBINE ENGINE SYNT BASE

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. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
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 73-25-34-710-805-A	Operational Test of the Engine Interface Unit (with CFDS)
TASK 73-29-00-710-802-A	FADEC Test (Menu Mode)
Engine Oil Low Pressure Switch

3. Job Set-up
Subtask 79-34-15-941-056-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 79-34-15-010-058-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

4. Procedure
Subtask 79-34-15-420-055-A

A. Installation of the Engine Oil Low Pressure Switch (oil LP switch)
(1) Remove all the COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Lubricate the threads of the four bolts (4) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062)
(3) Install the four bolts (4) to attach the oil LP switch (5) to the mount bracket (2).
(4) TORQUE the four bolts (4) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

.
(5) Connect the coupling nut of the tube (3) to the oil LP switch (5).
(6) TORQUE the coupling nut of the tube (3) to between 1.70 and 1.53 m.daN (12.54 and 11.28 lbf.ft )

.
(7) Connect the electrical connector (6) to the receptacle on the oil LP switch (5) (Ref. AMM TASK 70-70-00-910-804).
(8) Attach the electrical harness of the electrical connector (6) to the support bracket (1).

Subtask 79-34-15-710-053-A

B. Test(s)
(1) Do the FADEC test (menu mode) (Ref. AMM TASK 73-29-00-710-802).
(2) Do the EIU test (Ref. AMM TASK 73-25-34-710-805).

5. Close-up
Subtask 79-34-15-410-054-A

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 71-13-00-410-803):
(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 03:43:34 UTC