DOC AIRBUS | AMM A320FTest No. 13 - Main Oil Pressure Test and Adjustment [PW11]
TASK 71-00-00-780-802-A
Test No. 13 - Main Oil Pressure Test and Adjustment
Use this procedure to do a main oil pressure test and adjustment.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 71-00-00-941-136-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-780-052-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-223-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:31:42 UTC
Test No. 13 - Main Oil Pressure Test and Adjustment
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobUse this procedure to do a main oil pressure test and adjustment.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | CONTAINER 20L (5 USGAL) |
| No specific | Torque wrench: range to between 30 and 10 lbf.in (0.34 and 0.11 m.daN )  | |
| No specific | Torque wrench: range to between 40 and 36 lbf.in (0.45 and 0.41 m.daN ) | |
| No specific | Torque wrench: range to between 165 and 148 lbf.in (1.86 and 1.67 m.daN ) | |
| 98F10103500000 | 2 | CHOCK-MLG,ENGINE RUN-UP |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P03-001) | lubricant, aircraft turbine engine |
| (Material No.P06-054) | Antigalling Compound |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 3 | PACKING | EIPC 79-21-02-01-360 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| TASK 71-00-00-860-814-A | Shutdown of the Engine |
| TASK 71-00-00-860-822-A | Start the Engine (Normal Manual Start) |
| TASK 71-00-00-860-823-A | Start the Engine (Normal Automatic Start) |
| TASK 71-00-00-910-803-A | Engine Operation Limits and Guidelines |
| TASK 71-00-00-910-804-A | General Warnings and Cautions and Related Safety Data |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-802-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-805-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-36-00-010-802-A | Opening of the Thrust Reverser Cowl-Doors |
| TASK 78-36-00-410-802-A | Closing of the Thrust Reverser Cowl-Doors |
| TASK 79-00-00-610-801-A | Check and Fill the Engine Oil |
Tool InstallationSubtask 71-00-00-941-136-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that all parts, tools, equipment and loose objects are removed from the engine air intake and the area around the intake.
(2) Make sure that the aircraft is clean and that there are no persons in the dangerous areas.
(3) Obey the engine safety precautions (Ref. AMM TASK 71-00-00-910-804) and the engine operation limits and guidelines procedure (Ref. AMM TASK 71-00-00-910-803).
(4) There must be two qualified persons in the cockpit when performing an engine run. One must monitor the outside and the aircraft behaviour while the other performs the engine test.
(5) If the aircraft begins to move while performing an engine run, immediately set all the thrust levers to idle position.
(6) Prepare the aircraft/engine for ground operation as follows:
(a) Make sure that the PARKING BRAKE switch is set to the ON position.
(b) Make sure that the landing gear wheel chocks are properly set.
(c) Check that the aircraft is cleared and that there are no persons, equipment, tools or loose objects in the danger areas.
(7) Make sure the oil quantity is correct. If necessary service the engine oil system (Ref. AMM TASK 79-00-00-610-801).
Subtask 71-00-00-860-222-A ** ON A/C NOT FOR ALL (1) Make sure that all parts, tools, equipment and loose objects are removed from the engine air intake and the area around the intake.
(2) Make sure that the aircraft is clean and that there are no persons in the dangerous areas.
(3) Obey the engine safety precautions (Ref. AMM TASK 71-00-00-910-804) and the engine operation limits and guidelines procedure (Ref. AMM TASK 71-00-00-910-803).
(4) There must be two qualified persons in the cockpit when performing an engine run. One must monitor the outside and the aircraft behaviour while the other performs the engine test.
(5) If the aircraft begins to move while performing an engine run, immediately set all the thrust levers to idle position.
(6) Prepare the aircraft/engine for ground operation as follows:
(a) Make sure that the PARKING BRAKE switch is set to the ON position.
(b) Make sure that the landing gear wheel chocks are properly set.
(c) Check that the aircraft is cleared and that there are no persons, equipment, tools or loose objects in the danger areas.
(7) Make sure the oil quantity is correct. If necessary service the engine oil system (Ref. AMM TASK 79-00-00-610-801).
B. Aircraft Maintenance Configuration
(1) Make sure that the 98F10103500000 CHOCK-MLG,ENGINE RUN-UP are in position on each forward outboard MLG wheel.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) On the air conditioning panel 30VU, make sure that the engine bleed valves are off (the OFF legend is on).
4. Procedure(1) Make sure that the 98F10103500000 CHOCK-MLG,ENGINE RUN-UP are in position on each forward outboard MLG wheel.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) On the air conditioning panel 30VU, make sure that the engine bleed valves are off (the OFF legend is on).
Subtask 71-00-00-780-052-A ** ON A/C NOT FOR ALL
A. Main Oil Pressure Test
(3) Let the engine becomes stable for ten minutes at MINIMUM IDLE.
(4) Make sure that all the engine parameters are in the permitted limits (Ref. AMM TASK 71-00-00-910-803).
(5) Make a record of the parameters that follow:
(b) Record the main oil pressure displayed on the ECAM.
(c) Record the main oil temperature displayed on the ECAM.
(6) For the tested engine, slowly accelerate the engine to N1 speed of 60 percent and remain at this power for ten minutes. Make sure the main oil temperature has stabilized before you record the data in the next step.
(7) For the tested engine, make a record of the parameters that follow:
(a) Record the percent N2 speed displayed on the ECAM.
(b) Record the main oil pressure displayed on the ECAM.
(c) Record the main oil temperature displayed on the ECAM.
(8) For the tested engine, slowly move the thrust lever to MINIMUM IDLE.
(a) Operate the engine for ten minutes at MINIMUM IDLE to let the engine temperatures decrease.
(9) For both engines, shutdown the engine (Normal) (Ref. AMM TASK 71-00-00-860-814).
Subtask 71-00-00-200-056-A ** ON A/C NOT FOR ALL CAUTION:
DO NOT OPERATE THE ENGINE AT POWER HIGHER THAN IS NECESSARY FOR THIS TEST PROCEDURE. OPERATION AT HIGHER THAN N1 SPEED OF 60% (STATIC GROUND TESTS) INCREASES THE CHANCE OF A SURGE. A GROUND VORTEX CAN GO INTO THE ENGINE INTAKE AND A SURGE CAN OCCUR. IF A SURGE OCCURS, DAMAGE TO THE ENGINE CAN OCCUR.
(1) Do an oil pressure test procedure for the oil control module that exists on the engine. For oil control module that has been replaced (new or refurbished), continue to Para. 4.C.(9). NOTE: This procedure provides oil pressure limits for N2 speeds above idle. If adjustment of the oil pressure is necessary, a procedure is given to replace the oil metering plug with a plug of a different orifice size.
NOTE: All oil leaks (except small leaks at seal drains that are permitted) must be repaired before you do this oil pressure test.
(2) Start the engine to be tested and the opposite engine and set the power to idle in order to get full hydraulic system redundancy. Refer to normal automatic start (Ref. AMM TASK 71-00-00-860-823) or normal manual start (Ref. AMM TASK 71-00-00-860-822). (3) Let the engine becomes stable for ten minutes at MINIMUM IDLE.
(4) Make sure that all the engine parameters are in the permitted limits (Ref. AMM TASK 71-00-00-910-803).
(5) Make a record of the parameters that follow:
NOTE: The engine must be stable at MINIMUM IDLE before you record the parameters.
(a) Record the percent N2 speed displayed on the Electronic Centralized Aircraft Monitoring (ECAM). (b) Record the main oil pressure displayed on the ECAM.
(c) Record the main oil temperature displayed on the ECAM.
(6) For the tested engine, slowly accelerate the engine to N1 speed of 60 percent and remain at this power for ten minutes. Make sure the main oil temperature has stabilized before you record the data in the next step.
(7) For the tested engine, make a record of the parameters that follow:
(a) Record the percent N2 speed displayed on the ECAM.
(b) Record the main oil pressure displayed on the ECAM.
(c) Record the main oil temperature displayed on the ECAM.
(8) For the tested engine, slowly move the thrust lever to MINIMUM IDLE.
(a) Operate the engine for ten minutes at MINIMUM IDLE to let the engine temperatures decrease.
(9) For both engines, shutdown the engine (Normal) (Ref. AMM TASK 71-00-00-860-814).
B. Check Procedure
(1) Examine the record of the oil temperature, oil pressure and N2 speed data and compare it to the high and low limits shown in the Main Oil Pressure Safety Limits.
(2) Use the oil temperature and oil pressure to calculate corrected main oil pressure (MOPCOR). Examine corrected main oil (MOPCOR) pressure and N2 speed and compare it to the high and low limits shown in the Main Oil Pressure Acceptance Band.
(3) If the corrected main oil pressure is within the permitted limits of the acceptance band, this test is complete.
(4) If the corrected main oil pressure data is not within the permitted limits of the acceptance band, the main oil pressure must be adjusted. The main oil pressure is adjusted by removing the oil metering plug (4) that is in the engine at this time and installing a new oil metering plug (4) with a different orifice size. After the new plug (4) is installed, the corrected oil pressure is checked again to make sure it is now within the permitted limits of the acceptance band.
Subtask 71-00-00-820-097-A ** ON A/C NOT FOR ALL (1) Examine the record of the oil temperature, oil pressure and N2 speed data and compare it to the high and low limits shown in the Main Oil Pressure Safety Limits.
(2) Use the oil temperature and oil pressure to calculate corrected main oil pressure (MOPCOR). Examine corrected main oil (MOPCOR) pressure and N2 speed and compare it to the high and low limits shown in the Main Oil Pressure Acceptance Band.
(3) If the corrected main oil pressure is within the permitted limits of the acceptance band, this test is complete.
(4) If the corrected main oil pressure data is not within the permitted limits of the acceptance band, the main oil pressure must be adjusted. The main oil pressure is adjusted by removing the oil metering plug (4) that is in the engine at this time and installing a new oil metering plug (4) with a different orifice size. After the new plug (4) is installed, the corrected oil pressure is checked again to make sure it is now within the permitted limits of the acceptance band.
C. Adjustment Procedure (if necessary)
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
(3) Deactivation of the Thrust Reverser for Maintenance:
(4) Open the left thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
(5) Get one of each of the oil metering plug (4) orifice class sizes before you do the steps that follow. See Table 501 and see the figure:
Table 501 - Metering Plug Size
(a) Find the oil control module attached to the gearbox approximately at the 9 o'clock position.
(b) Find the metering plug (4) located on the oil control module.
(c) Put the CONTAINER 20L (5 USGAL) below the oil control module.
(e) Remove and discard the packing (3).
(f) Remove the metering plug (4) from the oil control module.
(g) Record the removed metering plug (4) part number and class number.
(7) This procedure will determine the correct replacement metering plug (4) orifice class size that will change the main oil pressure to a level near the center of the acceptance band.
(a) Determine the amount of pressure change required relative to the value obtained in Para. 4.B.(2) to move main oil pressure to a level near the center of the acceptance band.
(b) Determine the amount of trim diameter change required to reach the necessary pressure change.
(c) Determine the diameter of the removed metering plug (4). See Para. 4.C.(6).(g).
(d) Determine the diameter necessary for the new metering plug (4) as follows:
1 If the corrected main oil pressure is too low, subtract trim diameter change amount from the diameter of the removed metering plug (4).
2 If the corrected main oil pressure is too high, add trim diameter change amount to the diameter of the removed metering plug (4).
(e) Select a metering plug (4) class with the diameter closest to the value calculated in Para. 4.C.(7).(d). Refer to the table 501.
(8) After you make a selection, install the new metering plug (4) as follows:
(b) TORQUE the metering plug (4) to between 165 and 148 lbf.in (1.86 and 1.67 m.daN ).
(c) ApplyP03-001 lubricant, aircraft turbine engine
(d) Install the packing (3) on the cap (2).
(e) Apply Antigalling Compound (Material No.P06-054) to the threads of the two bolts (1).
(g) TORQUE the two bolts (1) to between 40 and 36 lbf.in (0.45 and 0.41 m.daN ) in small increments and until the same torque indication holds.
(h) Do the oil pressure test procedure given in Para. 4.A. and 4.B. again.
(9) Adjust the main oil pressure for the installation of the new replacement oil control module as follows:
(b) Do the oil pressure test procedure given in Para. 4.A. and Para. 4.B.
(c) If the corrected main oil pressure is in the limits of the acceptance band, this test is complete. Go to Para. 5. Close-up.
(d) If the corrected main oil pressure data is not in the permitted limits of the acceptance band, the main oil pressure must be adjusted. The main oil pressure is adjusted by removing the class 3 oil metering plug (4) and installing a new oil metering plug (4) with a different orifice size. After the new oil metering plug (4) is installed, the oil pressure must be checked again, as specified in Para. 4.A. Make sure that the oil pressure is in the permitted limits of the acceptance band.
1 Determine the amount of trim diameter change required to reach the necessary pressure change.
2 Determine the diameter of the removed metering plug (4). Refer to Para. 4.C.(6).(g).
3 Determine the diameter necessary for the new metering plug (4) as follows:
a If the corrected main oil pressure is too low, subtract trim diameter change amount from the diameter of the removed metering plug (4).
b If the corrected main oil pressure is too high, add trim diameter change amount to the diameter of the removed metering plug (4).
4 Remove the metering plug (4). See Para. 4.C.(6).
5 Select the metering plug (4) class with the diameter closest to the value calculated in Para. 4.C.(9).(d).3_. See table 501.
6 Install the metering plug (4). See Para. 4.C.(8).
(e) Do the oil pressure test procedure given in Para. 4.A. and Para. 4.B. again.
Subtask 71-00-00-410-175-A ** ON A/C NOT FOR ALL (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
(3) Deactivation of the Thrust Reverser for Maintenance:
WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(a) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805). (4) Open the left thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
(5) Get one of each of the oil metering plug (4) orifice class sizes before you do the steps that follow. See Table 501 and see the figure:
Table 501 - Metering Plug Size
| Part Number | Nominal Orifice Diameter |
|---|---|
| 5325218CL1 | 0.010 in. (0.254 mm) |
| 5325218CL2 | 0.036 in. (0.914 mm) |
| 5325218CL3 | 0.050 in. (1.270 mm) |
| 5325218CL4 | 0.064 in. (1.626 mm) |
| 5325218CL5 | 0.079 in. (2.007 mm) |
| 5325218CL6 | 0.093 in. (2.362 mm) |
| 5325218CL7 | 0.107 in. (2.718 mm) |
| 5325218CL8 | 0.122 in. (3.099 mm) |
| 5325218CL9 | 0.136 in. (3.454 mm) |
| 5325218CL10 | 0.150 in. (3.810 mm) |
| 5325218CL11 | 0.165 in. (4.191 mm) |
| 5325218CL12 | 0.179 in. (4.547 mm) |
WARNING:
DO NOT LET THE HOT OIL TOUCH YOUR SKIN. USE PROTECTIVE CLOTHES AND EYE PROTECTION. HOT OIL CAN CAUSE BURNS TO YOUR EYES AND SKIN.
CAUTION:
INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
(6) Remove the oil metering plug (4) that is in the engine at this time by the steps that follow: (a) Find the oil control module attached to the gearbox approximately at the 9 o'clock position.
(b) Find the metering plug (4) located on the oil control module.
(c) Put the CONTAINER 20L (5 USGAL) below the oil control module.
NOTE: Only a small quantity of oil will drain when the metering plug is removed.
(d) Remove the two bolts (1) and the cap (2) from the oil control module. (e) Remove and discard the packing (3).
(f) Remove the metering plug (4) from the oil control module.
(g) Record the removed metering plug (4) part number and class number.
(7) This procedure will determine the correct replacement metering plug (4) orifice class size that will change the main oil pressure to a level near the center of the acceptance band.
(a) Determine the amount of pressure change required relative to the value obtained in Para. 4.B.(2) to move main oil pressure to a level near the center of the acceptance band.
(b) Determine the amount of trim diameter change required to reach the necessary pressure change.
(c) Determine the diameter of the removed metering plug (4). See Para. 4.C.(6).(g).
(d) Determine the diameter necessary for the new metering plug (4) as follows:
1 If the corrected main oil pressure is too low, subtract trim diameter change amount from the diameter of the removed metering plug (4).
2 If the corrected main oil pressure is too high, add trim diameter change amount to the diameter of the removed metering plug (4).
(e) Select a metering plug (4) class with the diameter closest to the value calculated in Para. 4.C.(7).(d). Refer to the table 501.
(8) After you make a selection, install the new metering plug (4) as follows:
CAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(a) Install the metering plug (4) into the oil control module. (b) TORQUE the metering plug (4) to between 165 and 148 lbf.in (1.86 and 1.67 m.daN )
. (c) Apply
(d) Install the packing (3) on the cap (2).
(e) Apply Antigalling Compound (Material No.P06-054) to the threads of the two bolts (1).
NOTE: For new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.
(f) Install the cap (2) with the two bolts (1) on the oil control module. (g) TORQUE the two bolts (1) to between 40 and 36 lbf.in (0.45 and 0.41 m.daN )
in small increments and until the same torque indication holds. (h) Do the oil pressure test procedure given in Para. 4.A. and 4.B. again.
(9) Adjust the main oil pressure for the installation of the new replacement oil control module as follows:
NOTE: This procedure is for a replacement oil control module. If you have adjusted the oil control module that exists in the previous steps, go to Para. 5 Close-up.
(a) Install a class 3 oil metering plug (4) as an initial baseline selection as specified in Para. 4.A.(7). (b) Do the oil pressure test procedure given in Para. 4.A. and Para. 4.B.
(c) If the corrected main oil pressure is in the limits of the acceptance band, this test is complete. Go to Para. 5. Close-up.
(d) If the corrected main oil pressure data is not in the permitted limits of the acceptance band, the main oil pressure must be adjusted. The main oil pressure is adjusted by removing the class 3 oil metering plug (4) and installing a new oil metering plug (4) with a different orifice size. After the new oil metering plug (4) is installed, the oil pressure must be checked again, as specified in Para. 4.A. Make sure that the oil pressure is in the permitted limits of the acceptance band.
1 Determine the amount of trim diameter change required to reach the necessary pressure change.
2 Determine the diameter of the removed metering plug (4). Refer to Para. 4.C.(6).(g).
3 Determine the diameter necessary for the new metering plug (4) as follows:
a If the corrected main oil pressure is too low, subtract trim diameter change amount from the diameter of the removed metering plug (4).
b If the corrected main oil pressure is too high, add trim diameter change amount to the diameter of the removed metering plug (4).
4 Remove the metering plug (4). See Para. 4.C.(6).
5 Select the metering plug (4) class with the diameter closest to the value calculated in Para. 4.C.(9).(d).3_. See table 501.
6 Install the metering plug (4). See Para. 4.C.(8).
(e) Do the oil pressure test procedure given in Para. 4.A. and Para. 4.B. again.
D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
Subtask 71-00-00-440-098-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 left thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
E. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 71-00-00-410-176-A ** ON A/C NOT FOR ALL F. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
Subtask 71-00-00-710-245-A ** ON A/C NOT FOR ALL (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
G. Do the Oil Pressure Test Procedure in Step 4.A. again.
5. Close-upSubtask 71-00-00-860-223-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).