ECU Cooling System
 Figure 001

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 TUBES - ECU AIR COOLING - REMOVAL/INSTALLATION
______________________________________________ TASK 75-24-49-000-040 Removal of the ECU Air Cooling Tube
 1. Reason for the Job

__________________
 Self Explanatory

 2. Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific protective covers No specific warning notice No specific access platform 1 m (3 ft. 3 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 75-24-49-991-300 Fig. 401
 3. Job Set-up
__________ Subtask 75-24-49-941-050
 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 75-24-49-010-050
 B. Get Access
 (1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
 FOR 1000EM1
 437AL, 438AR
 FOR 1000EM2
 447AL, 448AR

 (2) Put the access platform in position.

 4. Procedure
_________ (Ref. Fig. 401/TASK 75-24-49-991-300) Subtask 75-24-49-020-050
 A. Removal of the ECU air cooling Tube
 (1) Loosen the clamps (5) that attach the ECU air cooling tube (10) to the ECU cooling duct and the ECU.

 (2) Compress the ECU air cooling tube (10) and remove it from the ECU cooling duct and the ECU.

 (3) Install protective covers on the ECU and the ECU cooling duct.

 (4) Remove the clamps (5) from the ECU air cooling tube (10).

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 ECU Air Cooling Tube
 Figure 401/TASK 75-24-49-991-300

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 TASK 75-24-49-400-040

 Installation of the ECU Air Cooling Tube
 1. Reason for the Job

__________________
 Self Explanatory

 2. Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific warning notice
 No specific access platform 1 m (3 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors
 71-13-00-410-040 Closing of the Fan Cowl Doors
 75-24-49-991-300 Fig. 401

 3. Job Set-up
__________
 Subtask 75-24-49-860-050

 A. Aircraft Maintenance Configuration
 (1) On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.

 (2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).
　
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