Subtask 73-11-50-010-059
 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 73-11-50-991-304, 402/TASK 73-11-50-991-308)
 Subtask 73-11-50-420-056
 A. Installation of the Fuel Return Valve
 CAUTION : TAKE CARE DURING FUEL RETURN VALVE INSTALLATION NOT TO DAMAGE
_______
 THE NIPPLES.

 (1) Remove blanking caps.

 (2) Install the fuel return valve in position on the bracket (20), on fan frame between flanges E and F, at the 10 o'clock position.

 (a) Lubricate the threads of the bolts (100) with graphite grease (Material No. CP2101).

 (b) Attach the fuel return valve to the bracket (20) with bolts (100)

 and washers (110). R R PRE SB CFM 73-0096 R
 F 『 EEFF : ALL E Page 41073-11-50
 E E May 01/04 E E ECES ER (3) Lubricate the threads of the nipples with fuel, and connect the tubes R and hoses that follow: R

 F  『
 E  C F M  E
 E  E
 E  56-5B  E
 E  E 

R (a) Shutoff signal (PB/PSF) fuel tube (30) R R (b) Fuel pump HP tube (40) R (c) IDG cooler tube (50) R (d) Fuel pump LP tube (60) R (e) Drain tube (90) R (f) TORQUE the coupling nuts as follows: 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.
R 1_ Shutoff signal (PB/PSF) fuel tube (30), fuel pump HP tube (40)
R and drain tube (90) coupling nuts to between 135 and 150
R lbf.in (1.52 and 1.69 m.daN).

 2 Fuel return tube (10), to between 1000 and 1050 lbf.in (11.30
_ and 11.86 m.daN).
 3 IDG cooler tube (50) and Fuel pump LP tube (60) to between 450
_
 and 550 lbf.in (5.08 and 6.21 m.daN). R R END OF PRE SB CFM 73-0096 R
R POST SB CFM 73-0096 R
R (4) Lubricate the threads of the nipples with fuel, and connect the tubes
R  and hoses that follow: 
R  (a) Fuel pump HP tube (40) 
R  (b) Fuel pump LP tube (60)

 F 『 EEFF : ALL E Page 41173-11-50
 E E May 01/04 E E ECES ER (c) Bypass (PB/PSF) fuel tube (30) on the fuel return valve and on R the fuel pump LP tube (60).

 F  『
 E  C F M  E
 E  E
 E  56-5B  E
 E  E 

R (d) IDG cooler tube (50)
R (e) Drain tube (90)
R (f) TORQUE the coupling nuts as follows:
R CAUTION : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING
_______ R NUTS. R ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR R TIGHTEN THE COUPLING NUT. THIS WILL PREVENT DAMAGE TO R THE HARDWARE.
R 1_ Bypass (PB/PSF) fuel tube (30), fuel pump HP tube (40) andR drain tube (90) coupling nuts to between 135 and 150 lbf.in
 (1.52 and 1.69 m.daN).
R 2_Fuel return tube (10), to between 1000 and 1050 lbf.in (11.30 and 11.86 m.daN).
R 3_IDG cooler tube (50) and Fuel pump LP tube (60) to between 450
 and 550 lbf.in (5.08 and 6.21 m.daN). R R END OF SB CFM 73-0096 R
R (5) TORQUE the bolts (100) to between 100 and 110 lbf.in (1.13 and 1.24 m.daN).
R (6) Make sure that the connectors and receptacles are clean and clear of unwanted materials
R (7) Connect the HJ7 harness connectors (80) and HJ8 harness connector
 (70) to the FRV receptacle. Use soft-nose connector pliers only if necessary.
R (8) Make sure that the connectors are fully engaged and do not move.
 Subtask 73-11-50-360-054
 B. Do a leak check (Ref. TASK 73-11-50-360-002).
 F 『 EEFF : ALL E Page 41273-11-50
 E E May 01/04 E E ECES E

 F 『
 E C F M E
 E E
 E 56-5B E
 E E

 5. Close-up
________
 Subtask 73-11-50-410-056
 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).

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

 Lower the guard on the pushbutton switch. R
R Subtask 73-11-50-865-054
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
　
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