(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).
Subtask 79-21-10-010-062
B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
(2) Make sure that the access platform is in position.
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4. Procedure
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R (Ref. Fig. 405/TASK 79-21-10-991-305)
Subtask 79-21-10-420-058
A. Installation of the Back-up Oil Filter
CAUTION : DO NOT USE ANOTHER MAGNET TO REMOVE PARTICLES FROM THE DETECTOR
_______ MAGNETS. THIS CAN DECREASE THE MAGNETIC PERFORMANCE OF THE ELECTRICAL CHIP DETECTOR.
(1) Get the back-up filter (30) you have removed before (Ref. TASK 79-21-10-000-006). Make sure it has been cleaned as told in the Component Maintenance Manual of the lubrication unit: (Ref. CMM 792115). If not available, and only if necessary, get a new back-up filter (30).
(2) Make sure that the back-up seal (20), the O-ring (50) and the O-ring
(10) are in place on the replacement back-up filter (30). If in place on the filter, lubricate them with engine oil (Material No. CP2442).
(3) If seals (20), (50) and (10) are not in place on the filter, do as follows:
(a) Lubricate a new back-up filter (20) with engine oil (Material No. CP2442).
(b) Make sure (on the filter cover) that the back-up seal groove is clean.
(c) Install the new back-up seal
CAUTION : MAKE SURE THAT THE BACK-UP SEAL IS CORRECTLY SET WHEN
_______
YOU INSTALL IT.
1 Install the new back-up seal (20) fully against the cover of
_ the back-up filter. If necessary, (Ref. CMM 792115) for correct installation of this type of seal.
(4) Lubricate a new O-ring (50) and a new O-ring (10) with engine oil (Material No. CP2442).
(5) Make sure that the O-ring grooves are clean.
(6) Install the new O-rings in the lower and upper grooves of the back-up filter (30).
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(7) Set the back-up filter
CAUTION : MAKE SURE THE FILTER PIN IS CORRECTLY LOCATED BETWEEN TWO
_______ INNER RIBS OF THE COVER, AND NOT IN THE AXIS OF TAPPERED HOLES OF THE COVER . INCORRECT INSTALLATION CAN CAUSE AN IMPORTANT OIL LEAKAGE DURING ENGINE OPERATION WITH POSSIBLE IFSD AND ENGINE FAILURE.
CAUTION : DO NOT TURN THE COVER TO PREVENT DAMAGE TO THE FILTER.
_______
(a) Set the back-up filter in position. Push the filter into the housing until it comes against the filter housing flange.
(8) Lubricate the threads of the bolts (40) with engine oil (Material No. CP2442).
(9) Install the bolts to attach the back-up filter to the lubrication unit housing. TORQUE the bolts (40) to between 35 and 45 lbf.in (0.39 and 0.50 m.daN).
(10) Remove the oil drain container from under the back-up filter.
Subtask 79-21-10-790-051
B. Do a minimum idle check (Ref. TASK 71-00-00-710-006) and make sure there is no leakage from the back-up oil filter.
5. Close-up
________
Subtask 79-21-10-410-057
A. Close Access
(1) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(2) Remove the access platform(s).
(3) Remove the warning notice(s).
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TASK 79-21-10-000-007
Removal of the Scavenge Srceen Plugs from the Lubrication Unit
1. Reason for the Job
__________________
To permit the check of the scavenge screen plugs for debris, the removal/installation of an optional magnetic bar and the dry-out and relubrication procedure.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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