________ Subtask 79-21-30-410-052
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (3) Remove the warning notice(s).

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 CHIP DETECTOR - MASTER - REMOVAL/INSTALLATION
_____________________________________________ TASK 79-21-50-000-001 Removal of the Master Magnetic Chip Detector
 1. Reason for the Job

__________________
 Self Explanatory

 2. Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking caps No specific blanking plugs No specific container 4 L (1 USgal) No specific warning notice
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 79-21-50-991-300 Fig. 401 79-21-50-991-301 Fig. 402
 3. Job Set-up
__________ Subtask 79-21-50-941-050
 A. Safety Precautions
 (1) On the center pedestal, on the ENG panel 115VU:

 (a) Put a warning notice 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.

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 (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 to tell persons not to energize the FADEC 1(2).

 Subtask 79-21-50-010-050
 B. Open fan cowl doors: (Ref. TASK 71-13-00-010-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 4. Procedure
_________
 (Ref. Fig. 401/TASK 79-21-50-991-300, 402/TASK 79-21-50-991-301)
 Subtask 79-21-50-020-050
 A. Removal of the Master Chip Detector.
 WARNING : HOT OIL CAN CAUSE BAD BURNS. USE PRECAUTIONS TO PREVENT ANY
_______
 CONTACT WITH OIL SPLASHES DURING THE REMOVAL.

 (1) Put a container 4 L (1 USgal) below the lubrication unit during the removal of the master chip detector.

 (2) Disconnect the straight connector (80) from the 90 degrees interface connector. Put blanking caps on connector (80) and on the open of the 90 degrees interface connector.

 (3) Disconnect the hose (10) (hose to the servo-fuel heater) from the master chip detector (40) as follows:

 (a) Remove the 4 bolts (20).
 NOTE : The removal of the 4 bolts (20) also releases, the DPM
____ cable items below as a single unit:
 - the DPM cable integral receptacle and bracket and connected to the receptacle,

 - the 90 degrees interface connector. We recommend not to disconnect these items because:

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 Master Magnetic Chip Detector
 Figure 401/TASK 79-21-50-991-300

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 General View of the Master Magnetic Chip Detector as Installed on the

 Lubrication Unit
 Figure 402/TASK 79-21-50-991-301
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 - this is not necessary for the completion of the removal steps which follow, and

 - their disconnection may cause subsequently some bad electrical contacts.

 (b) Move the DPM cable (and its attached items) upwards and attach it, if necessary to keep it clear of the removal area of the master-chip-detector.
　
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