DOC AIRBUS | AMM A320FAdjustment/Test of the Fuel Metering Unit (FMU) - Convert the Woodward FMU SBE 73-0172 or SBE 73-0223 [IAE]
TASK 73-22-52-700-010-A
Adjustment/Test of the Fuel Metering Unit (FMU) - Convert the Woodward FMU SBE 73-0172 or SBE 73-0223
This task is for V2500-A5 engines.
SBE 73-0172
Use this procedure to re-set the FMU to convert the Woodward FMU part number 8061-636 to part number 8061-637 and part number 8061-637 to part number 8061-636.
SBE 73-0223
Use this procedure to re-set the FMU to convert the Woodward FMU part number 8061-639 to part number 8061-640 and part number 8061-640 to part number 8061-639.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 73-22-52-941-052-A ** ON A/C NOT FOR ALL
Subtask 73-22-52-020-059-A ** ON A/C NOT FOR ALL
(1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) Report the mismatch to your local quality representative.
(2) Remove the lockwire from the plug assembly (8).
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger external hexagon on the shaft (7), turn the shaft assembly in an anticlockwise (counterclockwise) direction This is to let stop setting letter X show in the switch window. Then, remove the WRENCH - HEXAGONAL.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN )
.
(8) Make sure that the detent (2) prevents the cap (3) from rotating.
(9) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that the pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(10) Identify the FMU with the correct nameplate.
(b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
(e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN ).
(g) Examine the nameplate (5) and make sure that you can see P/N 8061-637.
(h) Make sure that stop setting letter X is visible in the switch window.
(i) Make sure that:
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (SAE AS567 or an equivalent) and apply end twists. Use the WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal (9) with the WT-140418 assembly tool.
(11) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-637.
(b) Make sure that stop setting letter X is visible in the switch window.
(c) Make sure that:
(e) Make sure that two seals (9) are correctly installed.
(f) Make sure that two seals (9) have one of the two acceptable marks.
Subtask 73-22-52-730-052-A ** ON A/C NOT FOR ALL
(1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) If there is a mismatch, report it to your local quality representative.
(2) Remove the lockwire from the plug assembly (8).
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger internal hexagon on the shaft (7), this is to let stop setting letter O show in the switch window. Then, remove the hexagonal tool.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN ). Make sure that the detent (2) prevents the cap (3) from rotating.
(8) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that the pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(9) Identify the FMU with the correct nameplate.
(b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
(e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN ).
(g) Examine the nameplate (5) and make sure that you can see P/N 8061-636.
(h) Make sure that stop setting letter O is visible in the switch window.
(i) Make sure that:
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (SAE AS567 or an equivalent) and apply end twists. Use the WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal (9) with WT-140418 assembly tool.
(10) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-636.
(b) Make sure that stop setting letter O is visible in the switch window.
(c) Make sure that:
(e) Make sure that the two seals (9) are correctly installed.
(f) Make sure that the two seals (9) have one of the two acceptable marks.
Subtask 73-22-52-730-054-A ** ON A/C NOT FOR ALL
(1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) If there is a mismatch, report it to your local quality representative.
(2) Remove the lockwire from the plug assembly (8).
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) to allow the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger external hexagon on the shaft (7), turn the shaft assembly in an anticlockwise (counterclockwise) direction this is to let stop setting letter X show in the switch window. Then, remove the hexagonal tool.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN ).
(8) Make sure that the detent (2) prevents the cap (3) from rotating.
(9) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(10) Identify the FMU with the correct nameplate.
(b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
(e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN ).
(g) Examine the nameplate (5) and make sure that you can see P/N 8061-640.
(h) Make sure that stop setting letter X is visible in the switch window.
(i) Make sure that:
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (SAE AS567 or an equivalent) and apply end twists. Use WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal with the WT-140418 assembly tool.
(11) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-640.
(b) Make sure that stop setting letter X is visible in the switch window.
(c) Make sure that:
(e) Make sure that the two seals (9) are correctly installed.
(f) Make sure that the two seals (9) have one of the two acceptable marks.
Subtask 73-22-52-730-055-A ** ON A/C NOT FOR ALL
(1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) If there is a mismatch, report is to your local quality representative.
(2) Remove the lockwire from the plug assembly (8).
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger internal hexagon on the shaft (7), turn the shaft assembly in a clockwise direction. This is to let stop setting letter O show in the switch window. Then, remove the hexagonal tool.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN ).
(8) Make sure that the detent (2) prevents the cap (3) from rotating.
(9) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that the pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(10) Identify the FMU with the correct nameplate.
(b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
(e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN ).
(g) Examine the nameplate (5) and make sure that you can see P/N 8061-639.
(h) Make sure that stop setting letter O is visible in the switch window.
(i) Make sure that:
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (P/N 218006 or an equivalent) and apply end twists. Use WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal with the WT-140418 assembly tool.
(11) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-639.
(b) Make sure that stop setting letter O is visible in the switch window.
(c) Make sure that:
(e) Make sure that the two seals (9) are correctly installed.
(f) Make sure that the two seals (9) have one of the two acceptable marks.
Subtask 73-22-52-420-059-A ** ON A/C NOT FOR ALL
Subtask 73-22-52-942-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:01:27 UTC
Adjustment/Test of the Fuel Metering Unit (FMU) - Convert the Woodward FMU SBE 73-0172 or SBE 73-0223
WARNING:
BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES.
IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER.
IF NECESSARY, GET MEDICAL HELP.
AIRCRAFT FUEL IS POISONOUS.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
CAUTION:
REFER TO SBE 72-0285 IF THIS SWITCHING TASK IS DONE AS PART OF AN ENGINE RE-RATING EXERCISE. SBE 72-0285 : ENGINE CONVERSION - PROVIDE INSTRUCTIONS TO CHANGE THE V2500-A5 ENGINE RATING BY MODIFYING THE DATA ENTRY PLUG.
1. Reason for the JobThis task is for V2500-A5 engines.
SBE 73-0172
Use this procedure to re-set the FMU to convert the Woodward FMU part number 8061-636 to part number 8061-637 and part number 8061-637 to part number 8061-636.
SBE 73-0223
Use this procedure to re-set the FMU to convert the Woodward FMU part number 8061-639 to part number 8061-640 and part number 8061-640 to part number 8061-639.
NOTE: A FMU interchangeability table is given on the figure related to the FMU interchangeability table.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V02-127) | lockwire |
| (Material No.V02-138) | lockwire |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-40-11-911-012-A | General Instructions for the Uses of Lockwire |
| TASK 71-00-00-710-012-B | Test No.3 : Idle Leak Check |
| TASK 71-00-00-710-046-B | Test No.2 : Wet Motor Leak Check |
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 73-22-00-710-040-A | Operational Test of the FADEC SYSTEM on the Ground |
| TASK 73-22-52-400-010-B | Installation of the Fuel Metering Unit (FMU) |
| TASK 73-31-17-400-010-B | Installation of the Fuel Flow Transmitter |
| TASK 80-13-51-710-040-B | Operational Test of the Pneumatic Starter Valve and FMU with the CFDS |
FMU Interchangebility TableSubtask 73-22-52-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1 (2) shutdown occurred not less than five minutes before you do this procedure.
(3) On 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(S) in position to tell persons not to energize FADEC 1 (2).
Subtask 73-22-52-010-056-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1 (2) shutdown occurred not less than five minutes before you do this procedure.
(3) On 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(S) in position to tell persons not to energize FADEC 1 (2).
B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 73-22-52-020-059-A ** ON A/C NOT FOR ALL
A. Disconnect the engine harness from the FMU
(1) Disconnect the two lower engine harness connectors from the FMU to provide sufficient space to work (Ref. AMM TASK 73-22-52-400-010) and (Ref. AMM TASK 73-31-17-400-010).
Subtask 73-22-52-020-061-A ** ON A/C NOT FOR ALL (1) Disconnect the two lower engine harness connectors from the FMU to provide sufficient space to work (Ref. AMM TASK 73-22-52-400-010) and (Ref. AMM TASK 73-31-17-400-010).
B. De-pressurise the FMU fuel system before you do the switching procedure
(1) You must do this SUBTASK before you re-set the FMU.
(3) You must not use the fuel again in the engine.
Subtask 73-22-52-730-050-A ** ON A/C NOT FOR ALL (1) You must do this SUBTASK before you re-set the FMU.
WARNING:
YOU MUST MAKE SURE THAT THE FMU FUEL SYSTEM IS DE-PRESSURIZED BEFORE YOU DO THIS CONVERSION PROCEDURE. THIS IS TO AVOID POTENTIAL HAZARDS FROM FIRE AND INJURY TO PERSONS FROM PRESSURIZED FUEL.
(2) Disconnect the fuel tube (1) at the fuel pump end and allow the fuel to drain. (3) You must not use the fuel again in the engine.
WARNING:
YOU MUST MAKE SURE THAT THE FMU FUEL SYSTEM IS DE-PRESSURIZED BEFORE YOU DO THIS CONVERSION PROCEDURE. THIS IS TO AVOID POTENTIAL HAZARDS FROM FIRE AND INJURY TO PERSONS FROM PRESSURIZED FUEL.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
CAUTION:
YOU MUST NOT EXCEED THE RECOMMENDED TORQUE VALUES. OVER TORQUING CAN RESULT IN DAMAGE TO THE FUEL METERING UNIT (FMU) WHICH MAY NECESSITATE REPLACEMENT OF THE FMU.
CAUTION:
DO NOT EXCEED 50 LBF.IN (0.56 MDAN) OF TORQUE DURING THIS PROCEDURE.
CAUTION:
LOCKWIRE FRAGMENTS WILL BE LIBERATED DURING THE REWORK PROCEDURE. ALL SUCH FRAGMENTS MUST BE RECOVERED.
C. Resetting Procedure for the SBE 73-0172 Configuration: Conversion of Woodward FMU Part Number (P/N) 8061-636 to P/N 8061-637 (1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) Report the mismatch to your local quality representative.
| FMU PART NUMBER | POSITION SETTING LETTER |
|---|---|
| FMU 8061-636 | O |
| FMU 8061-637 | X |
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger external hexagon on the shaft (7), turn the shaft assembly in an anticlockwise (counterclockwise) direction This is to let stop setting letter X show in the switch window. Then, remove the WRENCH - HEXAGONAL.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN )
. (8) Make sure that the detent (2) prevents the cap (3) from rotating.
(9) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that the pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(10) Identify the FMU with the correct nameplate.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Remove the lockwire from the securing screws (4). (b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
NOTE: It is normal for the nameplate to have some markings and material deformation caused by the screws. The nameplate has identification markings on both sides.
(d) Turn the nameplate (5) over to show P/N 8061-637. Install the nameplate on the FMU with the two securing screws (4). (e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN )
. (g) Examine the nameplate (5) and make sure that you can see P/N 8061-637.
(h) Make sure that stop setting letter X is visible in the switch window.
(i) Make sure that:
- The safety pin (1) is secure.
- The safety pin (1) safeties the switchable assembly.
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (SAE AS567 or an equivalent) and apply end twists. Use the WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
NOTE: The inclusion of the seal (SAE AS567) item (9) is optional. The seal (9) is available from the Woodward Governor Company. Refer to Service Bulletin SBE 73-0172 (Woodward Service Bulletin 83724-73-0004).
NOTE: This step is optional.
(n) Safety the securing screw (4) with the lockwire (Material No.V02-138) . 1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal (9) with the WT-140418 assembly tool.
NOTE: The installation of the seal (9) is optional.
4 Finish the wire twists, and tie down the lockwire to the securing screw (4). (11) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-637.
(b) Make sure that stop setting letter X is visible in the switch window.
(c) Make sure that:
- The safety pin (1) is fully secure.
- The safety pin (1) safeties the switchable assembly.
(e) Make sure that two seals (9) are correctly installed.
(f) Make sure that two seals (9) have one of the two acceptable marks.
NOTE: Steps 4.C.(11)(e) and 4.C.(11)(f) are applicable only if the seals (9) are installed.
WARNING:
YOU MUST MAKE SURE THAT THE FMU FUEL SYSTEM IS DE-PRESSURIZED BEFORE YOU DO THIS CONVERSION PROCEDURE. THIS IS TO AVOID POTENTIAL HAZARDS FROM FIRE AND INJURY TO PERSONS FROM PRESSURIZED FUEL.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
CAUTION:
YOU MUST NOT EXCEED THE RECOMMENDED TORQUE VALUES. OVER TORQUING CAN RESULT IN DAMAGE TO THE FUEL METERING UNIT (FMU) WHICH MAY NECESSITATE REPLACEMENT OF THE FMU.
CAUTION:
DO NOT EXCEED 50 LBF.IN (0.56 MDAN) OF TORQUE DURING THIS PROCEDURE.
CAUTION:
LOCKWIRE FRAGMENTS WILL BE LIBERATED DURING THE REWORK PROCEDURE. ALL SUCH FRAGMENTS MUST BE RECOVERED.
D. Resetting procedure for the SBE 73-0172 Configuration: Conversion of Woodward FMU Part Number (P/N) 8061-637 to P/N 8061-636 (1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) If there is a mismatch, report it to your local quality representative.
| FMU PART NUMBER | POSITION SETTING LETTER |
|---|---|
| FMU 8061-636 | O |
| FMU 8061-637 | X |
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger internal hexagon on the shaft (7), this is to let stop setting letter O show in the switch window. Then, remove the hexagonal tool.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN )
. Make sure that the detent (2) prevents the cap (3) from rotating. (8) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that the pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(9) Identify the FMU with the correct nameplate.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Remove the lockwire from the securing screw (4). (b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
NOTE: It is normal for the nameplate to have some markings and material deformation caused by the screws. The nameplate has identification markings on both sides.
(d) Turn the nameplate (5) over to show P/N 8061-636. Install the nameplate on the FMU with the two securing screws (4). (e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN )
. (g) Examine the nameplate (5) and make sure that you can see P/N 8061-636.
(h) Make sure that stop setting letter O is visible in the switch window.
(i) Make sure that:
- The safety pin (1) is secure.
- The safety pin (1) safeties the switchable assembly.
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (SAE AS567 or an equivalent) and apply end twists. Use the WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
NOTE: The inclusion of the seal (SAE AS567) item (9) is optional. The seal (9) is available from the Woodward Governor Company. Refer to Service Bulletin SBE 73-0172 (Woodward Service Bulletin 83724-73-0004).
NOTE: This step is optional.
(n) Safety the securing screw (4) with the lockwire (Material No.V02-138) . 1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal (9) with WT-140418 assembly tool.
NOTE: The installation of the seal (9) is optional.
4 Finish the wire twists, and tie down the lockwire to the securing screw (4). (10) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-636.
(b) Make sure that stop setting letter O is visible in the switch window.
(c) Make sure that:
- The safety pin (1) is fully secure.
- The safety pin (1) safeties the switchable assembly.
(e) Make sure that the two seals (9) are correctly installed.
(f) Make sure that the two seals (9) have one of the two acceptable marks.
NOTE: Steps 4.D.(10)(e) and 4.D.(10)(f) are applicable only if the seals (9) are installed
WARNING:
YOU MUST MAKE SURE THAT THE FMU FUEL SYSTEM IS DE-PRESSURIZED BEFORE YOU DO THIS CONVERSION PROCEDURE. THIS IS TO AVOID POTENTIAL HAZARDS FROM FIRE AND INJURY TO PERSONS FROM PRESSURIZED FUEL.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
CAUTION:
YOU MUST NOT EXCEED THE RECOMMENDED TORQUE VALUES. OVER TORQUING CAN RESULT IN DAMAGE TO THE FUEL METERING UNIT (FMU) WHICH MAY NECESSITATE REPLACEMENT OF THE FMU.
CAUTION:
DO NOT EXCEED 50 LBF.IN (0.56 MDAN) OF TORQUE DURING THIS PROCEDURE.
CAUTION:
LOCKWIRE FRAGMENTS WILL BE LIBERATED DURING THE REWORK PROCEDURE. ALL SUCH FRAGMENTS MUST BE RECOVERED.
E. Resetting procedure for the SBE 73-0223 Configuration: Conversion of Woodward FMU Part Number (P/N) 8061-639 to P/N 8061-640 (1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) If there is a mismatch, report it to your local quality representative.
| FMU PART NUMBER | POSITION SETTING LETTER |
|---|---|
| FMU 8061-639 | O |
| FMU 8061-640 | X |
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) to allow the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger external hexagon on the shaft (7), turn the shaft assembly in an anticlockwise (counterclockwise) direction this is to let stop setting letter X show in the switch window. Then, remove the hexagonal tool.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN )
. (8) Make sure that the detent (2) prevents the cap (3) from rotating.
(9) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(10) Identify the FMU with the correct nameplate.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Remove the lockwire from the securing screw (4). (b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
NOTE: It is normal for the nameplate to have some markings and material deformation caused by the screws. The nameplate has identification markings on both sides.
(d) Turn the nameplate (5) over to show P/N 8061-640. Install the nameplate on the FMU with the two securing screws (4). (e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN )
. (g) Examine the nameplate (5) and make sure that you can see P/N 8061-640.
(h) Make sure that stop setting letter X is visible in the switch window.
(i) Make sure that:
- The safety pin (1) is secure.
- The safety pin (1) safeties the switchable assembly.
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (SAE AS567 or an equivalent) and apply end twists. Use WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
NOTE: The inclusion of the seal (SAE AS567) item (9) is optional. The seal (9) is available from the Woodward Governor Company. Refer to Service Bulletin SBE 73-0223 (Woodward Service Bulletin 83724-73-0006).
NOTE: This step is optional.
(n) Safety the securing screw (4) with the lockwire (Material No.V02-138) . 1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal with the WT-140418 assembly tool.
NOTE: The installation of the seal (9) is optional.
4 Finish the wire twists, and tie down the lockwire to the securing screw (4). (11) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-640.
(b) Make sure that stop setting letter X is visible in the switch window.
(c) Make sure that:
- The safety pin (1) is fully secure.
- The safety pin (1) safeties the switchable assembly.
(e) Make sure that the two seals (9) are correctly installed.
(f) Make sure that the two seals (9) have one of the two acceptable marks.
NOTE: Steps 4.E.(11)(e) and 4.E.(11)(f) are applicable only if the seals (9) are installed.
WARNING:
YOU MUST MAKE SURE THAT THE FMU FUEL SYSTEM IS DE-PRESSURIZED BEFORE YOU DO THIS CONVERSION PROCEDURE. THIS IS TO AVOID POTENTIAL HAZARDS FROM FIRE AND INJURY TO PERSONS FROM PRESSURIZED FUEL.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
CAUTION:
YOU MUST NOT EXCEED THE RECOMMENDED TORQUE VALUES. OVER TORQUING CAN RESULT IN DAMAGE TO THE FUEL METERING UNIT (FMU) WHICH MAY NECESSITATE REPLACEMENT OF THE FMU.
CAUTION:
DO NOT EXCEED 50 LBF.IN (0.56 MDAN) OF TORQUE DURING THIS PROCEDURE.
CAUTION:
LOCKWIRE FRAGMENTS WILL BE LIBERATED DURING THE REWORK PROCEDURE. ALL SUCH FRAGMENTS MUST BE RECOVERED.
F. Resetting procedure for the SBE 73-0223 Configuration: Conversion of Woodward FMU Part Number (P/N) 8061-640 to PN/ 8061-639 (1) Before you change the setting, make sure that the FMU P/N and the stop setting letter correctly match each other.
(a) If there is a mismatch, report is to your local quality representative.
| FMU PART NUMBER | POSITION SETTING LETTER |
|---|---|
| FMU 8061-639 | O |
| FMU 8061-640 | X |
(3) Remove the safety pin (1) from the plug assembly (8).
(4) Using the WRENCH - HEXAGONAL, turn the detent (2) inwards in a clockwise direction until there is sufficient clearance between the top of the detent (2) and the cap (3) this is to make it possible to rotate the cap (3).
(5) Using the WRENCH - HEXAGONAL in the larger internal hexagon on the shaft (7), turn the shaft assembly in a clockwise direction. This is to let stop setting letter O show in the switch window. Then, remove the hexagonal tool.
(6) Put the WRENCH - HEXAGONAL in the alternative hole in the cap (3) and turn the detent (2) outwards in an anticlockwise (counterclockwise) direction.
(7) TORQUE the detent (2) outwards to between 22 and 19 lbf.in (0.25 and 0.21 m.daN )
. (8) Make sure that the detent (2) prevents the cap (3) from rotating.
(9) Install the safety pin (1) through the body of the switchable unit to safety it. Make sure that the pin is secure in the hexagon. Make sure that the pin is pushed in until it springs/clicks fully in position.
(10) Identify the FMU with the correct nameplate.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Remove the lockwire from the securing screw (4). (b) Remove the two securing screws (4) from the nameplate. Then, remove the nameplate.
(c) Examine the nameplate for damage. If damage is excessive, replace the nameplate.
NOTE: It is normal for the nameplate to have some markings and material deformation caused by the screws. The nameplate has identification markings on both sides.
(d) Turn the nameplate (5) over to show P/N 8061-639. Install the nameplate on the FMU with the two securing screws (4). (e) Check the run-on torque.
1 If the run-on torque is less than 10 oz. (0.07 Nm), then replace the two securing screws (4).
2 If the run-on torque continues to be less than 10 oz. (0.07 Nm), then replace the inserts.
(f) TORQUE the securing screws (4) to between 6.0 and 5.5 lbf.in (0.07 and 0.06 m.daN )
. (g) Examine the nameplate (5) and make sure that you can see P/N 8061-639.
(h) Make sure that stop setting letter O is visible in the switch window.
(i) Make sure that:
- The safety pin (1) is secure.
- The safety pin (1) safeties the switchable assembly
(k) Twist the two wires. Use the standard double twist method (SAE AS567 or an equivalent). Route the twisted wire under the safety pin (1) and around the plug assembly (8). Make sure that the wire is as taut as possible.
(l) Use one strand of the lockwire to loop through the pin eyelet (1). Twist the wire pair again to make sure that it is firmly attached to the eyelet of the pin.
(m) Attach one seal (9) (P/N 218006 or an equivalent) and apply end twists. Use WT-140418 assembly tool to crimp the seal (9). Tie down the pigtail of the lockwire to the lockwire underneath.
NOTE: The inclusion of the seal (SAE AS567) item (9) is optional. The seal (9) is available from the Woodward Governor Company. Refer to Service Bulletin SBE 73-0223 (Woodward Service Bulletin 83724-73-0006).
NOTE: This step is optional.
(n) Safety the securing screw (4) with the lockwire (Material No.V02-138) . 1 Twist and loop the safety wire underneath the LP pump inlet boss. Route the twisted lockwire back over the top of the LP pump inlet boss.
2 Stop the twist of the wires at the intersection where the two wires meet, and loop the two wire strands around the twisted safety wire.
3 Twist the lockwire after the loop, so that the two sets of the lockwire are attached. Install one seal (9) and crimp the seal with the WT-140418 assembly tool.
NOTE: The installation of the seal (9) is optional.
4 Finish the wire twists, and tie down the lockwire to the securing screw (4). (11) Do the final checks.
(a) Examine the nameplate (5) and make sure that you can see P/N 8061-639.
(b) Make sure that stop setting letter O is visible in the switch window.
(c) Make sure that:
- The safety pin (1) is fully secure.
- The safety pin (1) safeties the switchable assembly.
(e) Make sure that the two seals (9) are correctly installed.
(f) Make sure that the two seals (9) have one of the two acceptable marks.
NOTE: Steps 4.F.(11)(e) and 4.F.(11)(f) are applicable only if the seals (9) are installed.
G. Connect the engine harness to the FMU and the fuel tube (1) at the fuel pump end.
5. Close-upSubtask 73-22-52-942-053-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
Subtask 73-22-52-710-052-A ** ON A/C NOT FOR ALL (1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
B. Do the following tests
(1) Do an idle check (Ref. AMM TASK 71-00-00-710-012).
(3) Do the operational FADEC test (Ref. AMM TASK 73-22-00-710-040).
(1) Do an idle check (Ref. AMM TASK 71-00-00-710-012).
NOTE: A wet motor leak check (Ref. AMM TASK 71-00-00-710-046) may be used to check for leaks, but this must be followed by an idle leak check (Ref. AMM TASK 71-00-00-710-012).
(2) Do the operational test of the starter and FMU (Ref. AMM TASK 80-13-51-710-040). (3) Do the operational FADEC test (Ref. AMM TASK 73-22-00-710-040).