(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 73-11-48-010-050
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 73-11-48-991-300) Subtask 73-11-48-020-050
A. Removal of the Fuel/Return Bypass Valve Hose.
(1) Remove the bolt (10), the nut (20), and the clamp (15) that attach the fuel/return bypass valve hose (5) to the bracket.
(2) Put the container near the fuel/return bypass valve to catch the drained fuel.
(3) Disconnect the hose (5) from the fuel/return bypass valve. Let the fuel drain into the container.
(4) Cut and remove the lockwire from the bolts (25).
(5) Remove the bolts (25) and the washers (30) that attach the hose (5) to the fluid disconnect panel.
(6) Remove and discard the gasket (35).
(7) Put the protective covers on the ends of the hose (5), the fluid disconnect panel, and the fuel/return bypass valve.
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Fuel Return Valve Hose
Figure 401/TASK 73-11-48-991-300
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TASK 73-11-48-400-041
Installation of the Fuel/Return Bypass Valve Hose
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.)
No specific Torque Wrench : range 24 to 36 lbf.in
(0.27 to 0.40 m.daN)
No specific Torque Wrench : range 180.00 to 1800.00 lbf.in
(2.00 to 20.00 m.daN)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP2442 * engine oil (Ref. 70-30-00) Material No. CP8001 * lockwire 0.032 in. (0.8 mm) dia. (Ref. 70-30-00) Material No. CP8002 * lockwire 0.032 in. (0.8 mm) dia. (Ref. 70-30-00)
C. Expendable Parts
-------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
R 35 gasket 73-11-48 01A-030
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D. 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 73-11-50-360-002 Leak Check of the Fuel Return Valve 73-11-48-991-300 Fig. 401
3. Job Set-up
__________
Subtask 73-11-48-860-050
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).
(3) Make sure that the access platform is in position.
Subtask 73-11-48-010-051
B. Make sure that the fan cowl doors are open: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
4. Procedure
_________
(Ref. Fig. 401/TASK 73-11-48-991-300)
Subtask 73-11-48-640-050
A. Lubricate the coupling nut threads with engine oil (Material No. CP2442).
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