DOC AIRBUS | AMM A320FGeneral Visual Inspection of the Fuel-Distribution System Components, Manifolds Tubes and Joints [IAE]
TASK 73-10-00-200-010-B
General Visual Inspection of the Fuel-Distribution System Components, Manifolds Tubes and Joints
This task gives the procedure for a General Visual Inspection of the Engine Fuel Distribution system Components, Manifolds, Tubes and Joints.
This TASK is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 73-10-00-941-051-A ** ON A/C NOT FOR ALL
Subtask 73-10-00-210-059-A ** ON A/C NOT FOR ALL
Subtask 73-10-00-410-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:00:01 UTC
General Visual Inspection of the Fuel-Distribution System Components, Manifolds Tubes and Joints
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
1. Reason for the JobThis task gives the procedure for a General Visual Inspection of the Engine Fuel Distribution system Components, Manifolds, Tubes and Joints.
This TASK is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | LIGHT SOURCE - INSPECTION |
| No specific | AR | MIRROR - INSPECTION |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-52-11-918-010-A | Specified Types of Damage |
| 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 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
| TASK 79-21-43-000-010-B | Removal of the Fuel Cooled Oil Cooler |
| TASK 79-21-43-400-010-B | Installation of the Fuel Cooled Oil Cooler |
| TASK 24-21-42-000-010-B | Removal of the Fuel-Cooled IDG Oil-Cooler (for corrective action) |
| TASK 24-21-42-400-010-B | Installation of the Fuel-Cooled IDG Oil-Cooler (for corrective action) |
| TASK 73-11-41-000-010-B | Removal of the Fuel Nozzle Supply Manifold (for corrective action) |
| TASK 73-11-41-400-010-B | Installation of the Fuel Nozzle Supply Manifold (for corrective action) |
| TASK 73-12-41-000-010-B | Removal of the Low Pressure (LP)/High Pressure (HP) Fuel Pump (for corrective action) |
| TASK 73-12-41-400-010-B | Installation of the Low Pressure (LP)/High Pressure (HP) Fuel Pump (for corrective action) |
| TASK 73-13-42-000-010-A | Removal of the Fuel Diverter and Return Valve (for corrective action) |
| TASK 73-13-42-400-010-A | Installation of the Fuel Diverter and Return Valve (for corrective action) |
| TASK 73-13-43-000-010-B | Removal of the Fuel Distribution Valve (for corrective action) |
| TASK 73-13-43-400-010-B | Installation of the Fuel Distribution Valve (for corrective action) |
| TASK 73-22-52-000-010-B | Removal of the Fuel Metering Unit (FMU) (for corrective action) |
| TASK 73-22-52-400-010-B | Installation of the Fuel Metering Unit (FMU) (for corrective action) |
| TASK 79-21-43-000-010-B | Removal of the Fuel Cooled Oil Cooler (for corrective action) |
| TASK 79-21-43-400-010-B | Installation of the Fuel Cooled Oil Cooler (for corrective action) |
Subtask 73-10-00-941-051-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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.
(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(S) to tell persons not to energize the FADEC 1(2).
Subtask 73-10-00-010-052-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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.
(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(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 73-10-00-040-051-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
C. Deactivate the thrust reverser.
Subtask 73-10-00-010-053-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012). D. Get Access
(1) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
4. Procedure(1) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 73-10-00-210-059-A ** ON A/C NOT FOR ALL
A. Examine the fuel nozzle supply manifolds on the diffuser case between the fuel distribution valve and the fuel nozzles. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION if necessary
(1) Examine the fuel nozzle supply manifolds for security of attachment.
(2) If loose attachment is found replace the packings and torque the manifold coupling nuts and attachment clips (Ref. AMM TASK 73-11-41-000-010) and (Ref. AMM TASK 73-11-41-400-010).
(3) Examine the fuel nozzle supply manifold connections for leaks.
(4) If leaks are found replace the manifold connection packings or manifolds as necessary (Ref. AMM TASK 73-11-41-000-010) and (Ref. AMM TASK 73-11-41-400-010).
(5) Examine the fuel nozzle supply manifolds for damage such as bends, dents, kinks and wrinkles (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the manifold (Ref. AMM TASK 73-11-41-000-010) and (Ref. AMM TASK 73-11-41-400-010).
(7) Examine the fuel nozzle supply manifolds for contact with other parts (such as tubes, ducts, and hoses).
(8) If contact is found replace the parts as necessary.
Subtask 73-10-00-210-060-A ** ON A/C NOT FOR ALL (1) Examine the fuel nozzle supply manifolds for security of attachment.
(2) If loose attachment is found replace the packings and torque the manifold coupling nuts and attachment clips (Ref. AMM TASK 73-11-41-000-010) and (Ref. AMM TASK 73-11-41-400-010).
(3) Examine the fuel nozzle supply manifold connections for leaks.
(4) If leaks are found replace the manifold connection packings or manifolds as necessary (Ref. AMM TASK 73-11-41-000-010) and (Ref. AMM TASK 73-11-41-400-010).
(5) Examine the fuel nozzle supply manifolds for damage such as bends, dents, kinks and wrinkles (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the manifold (Ref. AMM TASK 73-11-41-000-010) and (Ref. AMM TASK 73-11-41-400-010).
(7) Examine the fuel nozzle supply manifolds for contact with other parts (such as tubes, ducts, and hoses).
(8) If contact is found replace the parts as necessary.
B. Examine the fuel tubes between the fuel pump and the fuel distribution valve. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION if necessary
(1) Examine the fuel tubes for security of attachment.
(2) If loose attachment is found reject the packings and torque the tube coupling nuts and attachment clips.
(3) Examine the fuel tube connections for leaks.
(4) If leaks are found reject the tube connection packings or the tubes as necessary.
(5) Examine the fuel tubes for damage such as bends, dents, kinks and wrinkles (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found reject the tubes.
(7) Examine the fuel tubes for contact with other parts (such as tubes, ducts and hoses).
(8) If contact is found reject the parts as necessary.
Subtask 73-10-00-210-061-A ** ON A/C NOT FOR ALL (1) Examine the fuel tubes for security of attachment.
(2) If loose attachment is found reject the packings and torque the tube coupling nuts and attachment clips.
(3) Examine the fuel tube connections for leaks.
(4) If leaks are found reject the tube connection packings or the tubes as necessary.
(5) Examine the fuel tubes for damage such as bends, dents, kinks and wrinkles (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found reject the tubes.
(7) Examine the fuel tubes for contact with other parts (such as tubes, ducts and hoses).
(8) If contact is found reject the parts as necessary.
C. Examine the LP/HP fuel pump. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary
(1) Examine the fuel pump for security of attachment.
(2) If loose attachment is found replace the accessory drive (pump attachment) clamp or the fuel pump (Ref. AMM TASK 73-12-41-000-010) and (Ref. AMM TASK 73-12-41-400-010).
(3) Examine the fuel pump connections for leaks.
(4) If leaks are found replace the tube connection packings or the pump as necessary (Ref. AMM TASK 73-12-41-000-010) and (Ref. AMM TASK 73-12-41-400-010).
(5) Examine the fuel pump for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel pump (Ref. AMM TASK 73-12-41-000-010) and (Ref. AMM TASK 73-12-41-400-010).
Subtask 73-10-00-210-062-A ** ON A/C NOT FOR ALL (1) Examine the fuel pump for security of attachment.
(2) If loose attachment is found replace the accessory drive (pump attachment) clamp or the fuel pump (Ref. AMM TASK 73-12-41-000-010) and (Ref. AMM TASK 73-12-41-400-010).
(3) Examine the fuel pump connections for leaks.
(4) If leaks are found replace the tube connection packings or the pump as necessary (Ref. AMM TASK 73-12-41-000-010) and (Ref. AMM TASK 73-12-41-400-010).
(5) Examine the fuel pump for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel pump (Ref. AMM TASK 73-12-41-000-010) and (Ref. AMM TASK 73-12-41-400-010).
D. Examine the fuel diverter and return valve. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary
(1) Examine the fuel diverter and return valve for security of attachment.
(2) If loose attachment is found replace the valve attachment bolts as necessary (Ref. AMM TASK 73-13-42-000-010) and (Ref. AMM TASK 73-13-42-400-010).
(3) Examine the fuel diverter and return valve tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the valve as necessary (Ref. AMM TASK 73-13-42-000-010) and (Ref. AMM TASK 73-13-42-400-010).
(5) Examine the fuel diverter and return valve for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel diverter and return valve (Ref. AMM TASK 73-13-42-000-010) and (Ref. AMM TASK 73-13-42-400-010).
Subtask 73-10-00-210-063-A ** ON A/C NOT FOR ALL (1) Examine the fuel diverter and return valve for security of attachment.
(2) If loose attachment is found replace the valve attachment bolts as necessary (Ref. AMM TASK 73-13-42-000-010) and (Ref. AMM TASK 73-13-42-400-010).
(3) Examine the fuel diverter and return valve tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the valve as necessary (Ref. AMM TASK 73-13-42-000-010) and (Ref. AMM TASK 73-13-42-400-010).
(5) Examine the fuel diverter and return valve for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel diverter and return valve (Ref. AMM TASK 73-13-42-000-010) and (Ref. AMM TASK 73-13-42-400-010).
E. Examine the fuel distribution valve. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary
(1) Examine the fuel distribution valve for security of attachment.
(2) If loose attachment is found replace the valve attachment bolts as necessary (Ref. AMM TASK 73-13-43-000-010) and (Ref. AMM TASK 73-13-43-400-010).
(3) Examine the fuel distribution valve tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the valve as necessary (Ref. AMM TASK 73-13-43-000-010) and (Ref. AMM TASK 73-13-43-400-010).
(5) Examine the fuel distribution valve for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel distribution valve (Ref. AMM TASK 73-13-43-000-010) and (Ref. AMM TASK 73-13-43-400-010).
Subtask 73-10-00-210-064-A ** ON A/C NOT FOR ALL (1) Examine the fuel distribution valve for security of attachment.
(2) If loose attachment is found replace the valve attachment bolts as necessary (Ref. AMM TASK 73-13-43-000-010) and (Ref. AMM TASK 73-13-43-400-010).
(3) Examine the fuel distribution valve tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the valve as necessary (Ref. AMM TASK 73-13-43-000-010) and (Ref. AMM TASK 73-13-43-400-010).
(5) Examine the fuel distribution valve for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel distribution valve (Ref. AMM TASK 73-13-43-000-010) and (Ref. AMM TASK 73-13-43-400-010).
F. Examine the fuel metering unit. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary
(1) Examine the fuel metering unit for security of attachment.
(2) If loose attachment is found replace the valve attachment bolts as necessary (Ref. AMM TASK 73-22-52-000-010) and (Ref. AMM TASK 73-22-52-400-010).
(3) Examine the fuel metering unit tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the metering unit as necessary (Ref. AMM TASK 73-22-52-000-010) and (Ref. AMM TASK 73-22-52-400-010).
(5) Examine the fuel metering unit for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel metering unit (Ref. AMM TASK 73-22-52-000-010) and (Ref. AMM TASK 73-22-52-400-010).
Subtask 73-10-00-210-065-A ** ON A/C NOT FOR ALL (1) Examine the fuel metering unit for security of attachment.
(2) If loose attachment is found replace the valve attachment bolts as necessary (Ref. AMM TASK 73-22-52-000-010) and (Ref. AMM TASK 73-22-52-400-010).
(3) Examine the fuel metering unit tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the metering unit as necessary (Ref. AMM TASK 73-22-52-000-010) and (Ref. AMM TASK 73-22-52-400-010).
(5) Examine the fuel metering unit for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the fuel metering unit (Ref. AMM TASK 73-22-52-000-010) and (Ref. AMM TASK 73-22-52-400-010).
G. Examine the fuel cooled IDG oil cooler. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary
(1) Examine the oil cooler for security of attachment.
(2) If loose attachment is found replace the oil cooler attachment bolts as necessary (Ref. AMM TASK 24-21-42-000-010) and (Ref. AMM TASK 24-21-42-400-010).
(3) Examine the oil cooler tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the oil cooler as necessary (Ref. AMM TASK 24-21-42-000-010) and (Ref. AMM TASK 24-21-42-400-010).
(5) Examine the oil cooler for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the oil cooler (Ref. AMM TASK 24-21-42-000-010) and (Ref. AMM TASK 24-21-42-400-010).
Subtask 73-10-00-210-066-A ** ON A/C NOT FOR ALL (1) Examine the oil cooler for security of attachment.
(2) If loose attachment is found replace the oil cooler attachment bolts as necessary (Ref. AMM TASK 24-21-42-000-010) and (Ref. AMM TASK 24-21-42-400-010).
(3) Examine the oil cooler tube connections for leaks.
(4) If leaks are found replace the tube connection packings or the oil cooler as necessary (Ref. AMM TASK 24-21-42-000-010) and (Ref. AMM TASK 24-21-42-400-010).
(5) Examine the oil cooler for damage such as dents, cracks and chafed areas (Ref. AMM TASK 70-52-11-918-010).
(6) If damage is found replace the oil cooler (Ref. AMM TASK 24-21-42-000-010) and (Ref. AMM TASK 24-21-42-400-010).
H. Examine the fuel cooled oil-cooler. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary.
General Visual Inspection of the Fuel Distribution System Components: Tubes and Joints ** ON A/C NOT FOR ALL
(1) Examine the fuel cooled oil-cooler to make sure that it is attached correctly.
(2) If it is attached loosely, replace the bolts to attach the fuel cooled oil-cooler as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(3) Examine the tube connections of the fuel cooled oil-cooler for leaks.
(4) If there are leaks, replace the tube connection packings or the fuel cooled oil-cooler as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(5) Examine the fuel cooled oil-cooler for damage such as dents, cracks and worn areas (Ref. AMM TASK 70-52-11-918-010).
(6) If there is damage, replace the fuel cooled oil-cooler (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(7) Examine the atmospheric vent hole of the fuel cooled oil-cooler for signs of oil or fuel wetting or leakage.
(9) If the fluid leaks (characterized by the formation of a drop or expectancy of a drop that will detach during engine operation), replace the unit (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
Subtask 73-10-00-210-067-A ** ON A/C NOT FOR ALL General Visual Inspection of the Fuel Distribution System Components: Tubes and Joints ** ON A/C NOT FOR ALL (2) If it is attached loosely, replace the bolts to attach the fuel cooled oil-cooler as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(3) Examine the tube connections of the fuel cooled oil-cooler for leaks.
(4) If there are leaks, replace the tube connection packings or the fuel cooled oil-cooler as necessary (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(5) Examine the fuel cooled oil-cooler for damage such as dents, cracks and worn areas (Ref. AMM TASK 70-52-11-918-010).
(6) If there is damage, replace the fuel cooled oil-cooler (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
(7) Examine the atmospheric vent hole of the fuel cooled oil-cooler for signs of oil or fuel wetting or leakage.
NOTE: Oil or fuel in this location shows either internal cracks between the fuel and oil seals or deterioration of the seals.
(8) If the fluid is only wetting (characterized by a moist surface without drip formation) the surface of the fuel cooled oil-cooler, the unit can continue in operation for ten cycles before it is replaced (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).(9) If the fluid leaks (characterized by the formation of a drop or expectancy of a drop that will detach during engine operation), replace the unit (Ref. AMM TASK 79-21-43-000-010) and (Ref. AMM TASK 79-21-43-400-010).
I. Examine the fuel system connections. Use the LIGHT SOURCE - INSPECTION and MIRROR - INSPECTION, if necessary
(1) Examine the fuel system connections for security of attachment.
(2) If loose attachment is found reject the fuel system connection packings and torque the coupling nuts as necessary.
(3) Examine the fuel system connections for leaks.
(4) If leaks are found, repair as necessary.
5. Close-up(1) Examine the fuel system connections for security of attachment.
(2) If loose attachment is found reject the fuel system connection packings and torque the coupling nuts as necessary.
(3) Examine the fuel system connections for leaks.
(4) If leaks are found, repair as necessary.
Subtask 73-10-00-410-052-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 73-10-00-440-051-A ** ON A/C NOT FOR ALL Subtask 73-10-00-410-053-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.