Installation of a Magnetic Bar in the Scavenge Screen Plugs (OPTIONAL) [CFMB]

TASK 79-00-00-480-001-A
Installation of a Magnetic Bar in the Scavenge Screen Plugs (OPTIONAL)

CAUTION: THE INSTALLATION OF THE MAGNETIC BARS MUST:

BE LIMITED TO ONE OF TWO ENGINES
STAY TEMPORARY. REVENUE SERVICE FLIGHTS WITH THE MAGNETIC BARS INSTALLED MUST BE LIMITED TO 5 CYCLES OR 25 HOURS AND THEN THE MAGNETIC BARS MUST BE REMOVED.

THE INSTALLATION OF THE MAGNETIC BARS IS ONLY AN HELP FOR TROUBLESHOOTING.

1. Reason for the Job
To identify the source of magnetic particles detected by the master chip detector, during a troubleshooting procedure.
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 140 and 120 lbf.in (1.58 and 1.36 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
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 79-21-10-000-007-A	Removal of the Scavenge Screen Plugs from the Lubrication Unit
TASK 79-21-10-400-007-A	Installation of the Scavenge Screen Plugs on the Lubrication Unit
Installation/Removal of the Magnetic Bar in/from the Savenge Screen plugs

3. Job Set-up
Subtask 79-00-00-941-058-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 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) to tell persons not to energize the FADEC 1(2).

Subtask 79-00-00-010-058-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 79-00-00-480-050-A ** ON A/C NOT FOR ALL

A. Installation of the Magnetics Bars

CAUTION: DO NOT TRY TO LOOSEN AND/OR REMOVE THE SCREEN FROM THE PLUG BODY BEFORE REMOVAL/INSTALLATION OF THE MAGNETIC BAR. THE PLUG BODY AND THE SCREEN ARE A NON-SEPARABLE ASSEMBLY. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE COULD OCCUR.

(1) Remove the scavenge screen plugs from the lubrication unit (Ref. AMM TASK 79-21-10-000-007).
(2) Lubricate the threads of the magnetic bars (10) with engine oil (Material No.CP2442) .
(3) Install the magnetic bar (10) in the scavenge screen plug body.
(4) TORQUE the magnetic bar (10) in the scavenge screen plug to between 140 and 120 lbf.in (1.58 and 1.36 m.daN )

.
(5) Install the scavenge screen plug and magnetic bars assemblies on the lubrication unit (Ref. AMM TASK 79-21-10-400-007).

5. Close-up
Subtask 79-00-00-410-059-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 03:38:47 UTC