DOC AIRBUS | AMM A320FCheck Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-802-A
Check Distribution Piping to Detect Leakage and Obstruction
Refer to the MPD TASK: 262100-06
CHECK DISTRIBUTION PIPING TO DETECT LEAKAGE AND OBSTRUCTION.
SUBTASKS REFER TO BOTH ENGINE SIDES.
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 26-21-00-861-067-A ** ON A/C NOT FOR ALL Subtask 26-21-00-941-070-A ** ON A/C NOT FOR ALL
Subtask 26-21-00-720-065-A ** ON A/C NOT FOR ALL
Subtask 26-21-00-410-081-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.03.31 23:44:42 UTC
Check Distribution Piping to Detect Leakage and Obstruction
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobRefer to the MPD TASK: 262100-06
CHECK DISTRIBUTION PIPING TO DETECT LEAKAGE AND OBSTRUCTION.
SUBTASKS REFER TO BOTH ENGINE SIDES.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | AR | AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY |
| No specific | AR | CAP - BLANKING |
| No specific | AR | COVER - PROTECTION |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )  | |
| 98D26203006002 | 1 | EXTINGUISHING FIRE TEST PW |
| M83723-60-18AN | AR | CAP, PROTECTIVE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14CCB6) | Testing Medium-Leak Detection - Oxygen System |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 415BL, 415CR, 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 425BL, 425CR, 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 9 | SEALS | AIPC 26-21-86-03-170 |
| 9 | SEALS | AIPC 26-21-86-04-170 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-15-00-910-001-A | Handling Precautions for Electrostatic Discharge Sensitive Devices |
| 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 26-12-00-710-001-A | Operational Check of Loop/Squib |
| TASK 26-21-00-710-002-A | Operational Check of Engine-Bottle Low-Pressure Indicating-Circuit |
| TASK 54-51-21-000-802-A | Removal of the Pylon Lateral Access-Doors |
| TASK 54-51-21-400-802-A | Installation of the Pylon Lateral Access-Doors |
| 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 |
Disconnection of the Engine Fire Extinguisher BottlesSubtask 26-21-00-861-067-A ** ON A/C NOT FOR ALL Subtask 26-21-00-941-070-A ** ON A/C NOT FOR ALL
B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(3) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the 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 26-21-00-865-100-A ** ON A/C NOT FOR ALL (1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(3) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the 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).
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 26-21-00-010-080-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE1 | Q44 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q43 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE2 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q41 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE1 | Q43 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE2 | Q41 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q40 |
D. Get Access
(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.
Subtask 26-21-00-040-058-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.
E. Deactivation of the Thrust Reverser System for Ground Maintenance
Subtask 26-21-00-010-081-A ** ON A/C NOT FOR ALL 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.
(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805). F. Get Access
(1) Open the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(2) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(3) Put an ACCESS PLATFORM 2M (6 FT) in position.
Subtask 26-21-00-020-066-A ** ON A/C NOT FOR ALL (1) Open the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(2) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(3) Put an ACCESS PLATFORM 2M (6 FT) in position.
G. Disconnect the Electrical Connector on the Pylons Fire Extinguisher Bottles
(2) Disconnect the electrical connector (4) from the pressure switch (5).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-21-00-481-051-A ** ON A/C NOT FOR ALL WARNING:
DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
(1) Before you touch the cartridge (7), do the procedure for devices that are sensitive to electrostatic discharge (Ref. AMM TASK 20-15-00-910-001). (2) Disconnect the electrical connector (4) from the pressure switch (5).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
H. Installation of the Safety Tool
(2) Put a M83723-60-18AN CAP, PROTECTIVE on the cartridge (7).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
Subtask 26-21-00-020-067-A ** ON A/C NOT FOR ALL WARNING:
BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT.
IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
(1) Disconnect the electrical connector (6) from the cartridge (7). (2) Put a M83723-60-18AN CAP, PROTECTIVE on the cartridge (7).
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
I. Disconnection of the Pylons Fire Extinguisher Bottles
(1) Loosen the nut of the coupling (2) to disconnect the extinguishing pipe (1) from the discharge head (8).
(2) Remove and discard the seal (9).
(3) Put blanking plug on the discharge head (8).
4. Procedure(1) Loosen the nut of the coupling (2) to disconnect the extinguishing pipe (1) from the discharge head (8).
(2) Remove and discard the seal (9).
(3) Put blanking plug on the discharge head (8).
Subtask 26-21-00-720-065-A ** ON A/C NOT FOR ALL
A. Functional Test of the Distribution Piping for Leakage and Obstruction
(a) Connect the coupling (12) of the support for pressure indicator (16) (P/N 98D26203006044) to outlet E (detail E).
(b) Connect a AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY to the support for pressure indicator (16).
(c) Open the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY and the tap (15) of the support for pressure indicator (16) and make sure that the air flows from outlets A and B (detail C) and C and D (detail D).
(d) Close the tap (15) of the support for pressure indicator (16) and close the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY.
(2) Leak test
(a) Install the two sealing plugs (10) (P/N 98D26203006050) on the outlets A and B (detail C).
(b) Install the two sealing plugs (11) (P/N 98D26203006048) on the outlets C and D (detail D).
(c) Open the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY and the tap (15) of the support for pressure indicator (16).
(d) Pressurize the line to 2 bar (29 psi) through the manometer (14) of the support for pressure indicator (16).
(e) Close the tap (15) of the support for pressure indicator (16) to isolate the extinguishing pipe (1).
(f) Monitor the extinguishing pipe (1) for 10 minutes to:
1 Make sure that there is no leakage.
2 Make sure that the pressure does not decrease by more than 0.2 bar (3 psi).
(g) If the pressure decreases by more than 0.2 bar (3 psi), do a leak check:
1 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) on the extinguishing pipe (1).
2 Examine the extinguishing pipe (1) for leaks.
3 If you find a leak, replace the defective component(s) and do the leak check again.
4 Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the extinguishing pipe (1) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(h) Close the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY.
(i) Open the drain tap (13) of the support for pressure indicator (16) to depressurize the extinguishing pipe (1).
(j) Disconnect the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY from the support for pressure indicator (16).
(k) Disconnect the coupling (12) of the support for pressure indicator (16) from the outlet E.
(l) Remove the two sealing plugs (10) from the outlets A and B.
(m) Remove the two sealing plugs (11) from the outlets C and D.
Subtask 26-21-00-420-059-A ** ON A/C NOT FOR ALL NOTE: The P/Ns 98D26203006044, 98D26203006048 and 98D26203006050 are parts of the 98D26203006002 EXTINGUISHING FIRE TEST PW.
(1) Obstruction test (a) Connect the coupling (12) of the support for pressure indicator (16) (P/N 98D26203006044) to outlet E (detail E).
(b) Connect a AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY to the support for pressure indicator (16).
(c) Open the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY and the tap (15) of the support for pressure indicator (16) and make sure that the air flows from outlets A and B (detail C) and C and D (detail D).
(d) Close the tap (15) of the support for pressure indicator (16) and close the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY.
(2) Leak test
(a) Install the two sealing plugs (10) (P/N 98D26203006050) on the outlets A and B (detail C).
(b) Install the two sealing plugs (11) (P/N 98D26203006048) on the outlets C and D (detail D).
(c) Open the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY and the tap (15) of the support for pressure indicator (16).
(d) Pressurize the line to 2 bar (29 psi) through the manometer (14) of the support for pressure indicator (16).
(e) Close the tap (15) of the support for pressure indicator (16) to isolate the extinguishing pipe (1).
(f) Monitor the extinguishing pipe (1) for 10 minutes to:
1 Make sure that there is no leakage.
2 Make sure that the pressure does not decrease by more than 0.2 bar (3 psi).
(g) If the pressure decreases by more than 0.2 bar (3 psi), do a leak check:
1 Apply Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) on the extinguishing pipe (1).
2 Examine the extinguishing pipe (1) for leaks.
3 If you find a leak, replace the defective component(s) and do the leak check again.
4 Remove the Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) from the extinguishing pipe (1) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(h) Close the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY.
(i) Open the drain tap (13) of the support for pressure indicator (16) to depressurize the extinguishing pipe (1).
(j) Disconnect the AIR SOURCE 2 BAR (30 PSI) - REGULATED, FILTERED, DRY from the support for pressure indicator (16).
(k) Disconnect the coupling (12) of the support for pressure indicator (16) from the outlet E.
(l) Remove the two sealing plugs (10) from the outlets A and B.
(m) Remove the two sealing plugs (11) from the outlets C and D.
B. Connection of the Pylons Engine Fire-Extinguisher Bottles
(2) Clean the component interfaces and the adjacent area.
(3) Install new AIPC 26-21-86-03-170 SEALS (9) for the left pylon bottles and new AIPC 26-21-86-04-170 SEALS (9) for the right pylon bottles on the discharge head (8).
(4) Connect the extinguishing pipe (1) to the discharge head (8).
(5) Install the coupling (2) on the extinguishing pipe (1).
(6) TORQUE the nut of the coupling (2) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN ).
Subtask 26-21-00-081-050-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE MAXIMUM PERMITTED LIFE (MPL) OF THE CARTRIDGE IS LONGER THAN THE TIME TO THE NEXT SCHEDULED DISCARD OF THE CARTRIDGE.
(1) Do an inspection of the component interfaces and the adjacent area.(2) Clean the component interfaces and the adjacent area.
(3) Install new AIPC 26-21-86-03-170 SEALS (9) for the left pylon bottles and new AIPC 26-21-86-04-170 SEALS (9) for the right pylon bottles on the discharge head (8).
(4) Connect the extinguishing pipe (1) to the discharge head (8).
(5) Install the coupling (2) on the extinguishing pipe (1).
(6) TORQUE the nut of the coupling (2) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )
. C. Removal of the Safety Tool
(2) Remove the M83723-60-18AN CAP, PROTECTIVE from the cartridge (7).
Subtask 26-21-00-420-060-A ** ON A/C NOT FOR ALL WARNING:
DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.
WARNING:
BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT.
IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.
(1) Before you touch the cartridge, do the procedure for devices that are sensitive to electrostatic discharge (Ref. AMM TASK 20-15-00-910-001). (2) Remove the M83723-60-18AN CAP, PROTECTIVE from the cartridge (7).
D. Connect the Electrical Connectors
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Connect the electrical connector (6) to the cartridge (7).
(4) Connect the electrical connector (4) to the pressure switch (5).
Subtask 26-21-00-865-101-A ** ON A/C NOT FOR ALL (1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Connect the electrical connector (6) to the cartridge (7).
(4) Connect the electrical connector (4) to the pressure switch (5).
E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 26-21-00-710-071-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE1 | Q44 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q43 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE2 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q41 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B | 2WE1 | Q43 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A | 1WE1 | Q42 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B | 2WE2 | Q41 |
| 121VU | ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A | 1WE2 | Q40 |
F. Test
(1) Do the operational check of loop/squib (Ref. AMM TASK 26-12-00-710-001).
(2) Do the operational check of engine-bottle low-pressure indicating-circuit (Ref. AMM TASK 26-21-00-710-002).
5. Close-up(1) Do the operational check of loop/squib (Ref. AMM TASK 26-12-00-710-001).
(2) Do the operational check of engine-bottle low-pressure indicating-circuit (Ref. AMM TASK 26-21-00-710-002).
Subtask 26-21-00-410-081-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Removal of the engine protection covers:
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(4) Close the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
Subtask 26-21-00-440-060-A ** ON A/C NOT FOR ALL (1) Removal of the engine protection covers:
CAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(a) Remove all the COVER - PROTECTION. (2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
(4) Close the left thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
B. Reactivation of the Thrust Reverser System after Ground Maintenance
(1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 26-21-00-410-082-A ** ON A/C NOT FOR ALL (1) Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).
C. 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 26-21-00-862-067-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).