B. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.

 (2) Remove the access platform(s).

 (3) Remove the warning notice(s).

 (4) On the overhead panel 20VU, push the ENG1(2) FIRE pushbutton switch.

 Lower the guard on the pushbutton switch. R
 Subtask 73-11-49-710-050
 C. Do a dry motoring check (Ref. TASK 71-00-00-710-001).
 5. Close-up
________
 Subtask 73-11-49-410-050
 A. Close Access
 (1) Close the fan cowl doors (Ref. TASK 71-13-00-410-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
R Subtask 73-11-49-865-057
R B. Remove the safety clip(s) and the tag(s) and close this(these) circuit R breaker(s):
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------R 49VU FUEL/LP VALVE/MOT1/ENG2 2QG A09 R 49VU FUEL/LP VALVE/MOT1/ENG1 1QG A08
R Subtask 73-11-49-862-051
R C. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-R 002).
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 FUEL RETURN VALVE - REMOVAL/INSTALLATION

________________________________________
 TASK 73-11-50-000-002
 Removal of the Fuel Return Valve (FRV)
 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
R  No specific circuit breaker(s) safety clip(s) No specific container 4 l (1USgal) No specific soft-nose connector pliers No specific warning notice
 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
R  24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
R External Power 71-13-00-010-040 Opening of the Fan Cowl Doors 73-11-50-991-304 Fig. 401 73-11-50-991-308 Fig. 402
 3. Job Set-up
__________
 Subtask 73-11-50-941-056
 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.
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 (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 to tell persons not to energize the FADEC

 1(2). R
R Subtask 73-11-50-861-051
R B. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
R Subtask 73-11-50-865-053
R C. Open, safety and tag this(these) circuit breaker(s):
R -------------------------------------------------------------------------------R PANEL DESIGNATION IDENT. LOCATION R -------------------------------------------------------------------------------R 49VU FUEL/LP VALVE/MOT1/ENG2 2QG A09 R 49VU FUEL/LP VALVE/MOT1/ENG1 1QG A08
 Subtask 73-11-50-010-057
R D. Open the fan cowl doors: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
 4. Procedure
_________
 (Ref. Fig. 401/TASK 73-11-50-991-304, 402/TASK 73-11-50-991-308)
 Subtask 73-11-50-020-053
 A. Removal of the Fuel Return Valve
 CAUTION : INSTALL CAPS AND PLUGS ON THE ORIFICES OF ALL DISCONNECTED
_______ PIPES AND PARTS FOR THEIR PROTECTION AGAINST CONTAMINATION BY UNWANTED MATERIALS.
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 CAUTION : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS.

_______ ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.
 (1) Install a container 4 l (1USgal) under the fuel return valve and loosen the fuel return tube (10) coupling nut to drain the fuel which remains in the tube.
　
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