DOC AIRBUS | AMM A320FLeak Test of the Bleed-Air PreCooler Exchanger (PCE)
TASK 36-11-42-790-802-A
Leak Test of the Bleed-Air PreCooler Exchanger (PCE)
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 36-11-42-861-056-A ** ON A/C NOT FOR ALL
Subtask 36-11-42-480-055-A ** ON A/C NOT FOR ALL
Subtask 36-11-42-410-060-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 01:09:22 UTC
Leak Test of the Bleed-Air PreCooler Exchanger (PCE)
WARNING:
MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING:
ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
WARNING:
MAKE SURE THAT NO SOURCE OF COMPRESSED AIR IS IN OPERATION IN THE AIRCRAFT WHEN YOU DO THIS TASK. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY TO PERSONNEL CAN OCCUR.
WARNING:
BEFORE YOU INSTALL/REMOVE THE GSE TOOL, READ THE MANUFACTURER'S INSTRUCTIONS, AND, WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT DO THIS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
WARNING:
BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.
CAUTION:
BE VERY CAREFUL WHEN YOU DO WORK ON OR NEAR THE AIR-CONDITIONING DUCTS. THE DUCTS ARE MADE OF THIN MATERIAL AND YOU CAN EASILY BREAK THEM.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| No specific | 1 | AIR SOURCE 5 BAR (72.5 PSI) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )  | |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| 98D36109002000 | 1 | ADAPTOR SET-PCE,BLEED |
| 98L12003001000 | AR | HARNESS,SAFETY |
| 98L36109001000 | 1 | LEAK TESTER-PCE,BLEED |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 410 | ENG 1 PYLON BOX AND FORWARD FAIRING |
| 420 | ENG 2 PYLON BOX AND FORWARD FAIRING |
| 191DB | |
| FOR [7150HM1] (EXCHANGER-BLEED AIR PRECOOL) | |
| 413CT, 413DT, 413ET | |
| FOR [7150HM2] (EXCHANGER-BLEED AIR PRECOOL) | |
| 423CT, 423DT, 423ET | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 5 | O-RING | AIPC 36-11-86-02-300 |
| 8 | O-RING | AIPC 36-11-86-30-110 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-00-00-481-002-A | Installation of the Wingrip |
| 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 27-00-00-080-002-A | Removal of the Flap/Slat Control-Lever Locking Tool (98D27803000000) |
| TASK 27-00-00-480-002-A | Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000) |
| TASK 36-11-42-000-802-A | Removal of the Bleed-Air Precooler Exchanger |
| TASK 36-11-42-400-802-A | Installation of the Bleed-Air Precooler Exchanger |
| TASK 36-11-53-000-802-A | Removal of the Overpressure Valve |
| TASK 36-11-53-400-802-A | Installation of the Overpressure Valve |
| TASK 36-22-00-790-802-A | Leak Check on all the Bleed Air Ducts and the Packs Components |
| TASK 71-00-00-860-833-A | Procedure to Prevent Engine Motoring |
| 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 |
PreCooler Exchanger-Test Set ToolsSubtask 36-11-42-861-056-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 36-11-42-941-060-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
B. Safety Precautions
(1) Make sure that engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On the AIR COND section of panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
(b) Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on).
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On access door 191DB, on the HP ground connectors:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(5) Put on and attach a 98L12003001000 HARNESS,SAFETY before you start work in the work area (Ref. AMM TASK 12-00-00-481-002).
(6) On the FLAPS section of panel 114VU:
(a) Put the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
(b) Put a WARNING NOTICE(S) on the flap/slat control lever to tell persons not to operate the flap/slat controls.
Subtask 36-11-42-865-071-A ** ON A/C NOT FOR ALL (1) Make sure that engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(2) On the AIR COND section of panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
(b) Make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on).
(c) Put a WARNING NOTICE(S) in position to tell persons not to operate the pneumatic system.
(3) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On access door 191DB, on the HP ground connectors:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the pneumatic system.
(5) Put on and attach a 98L12003001000 HARNESS,SAFETY before you start work in the work area (Ref. AMM TASK 12-00-00-481-002).
(6) On the FLAPS section of panel 114VU:
(a) Put the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
(b) Put a WARNING NOTICE(S) on the flap/slat control lever to tell persons not to operate the flap/slat controls.
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 36-11-42-040-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 7150HM1 (EXCHANGERBLEED AIR PRECOOL) | |||
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| FOR FIN: 7150HM2 (EXCHANGERBLEED AIR PRECOOL) | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
D. Deactivation of the Thrust Reverser System
Subtask 36-11-42-010-062-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) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805). E. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Remove these access panels:
(a) FOR [7150HM1] (EXCHANGER-BLEED AIR PRECOOL)
413CT 413DT and 413ET.
(b) FOR [7150HM2] (EXCHANGER-BLEED AIR PRECOOL)
423CT 423DT and 423ET.
Subtask 36-11-42-020-060-A ** ON A/C NOT FOR ALL (1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position.
(2) Remove these access panels:
(a) FOR [7150HM1] (EXCHANGER-BLEED AIR PRECOOL)
413CT 413DT and 413ET.
(b) FOR [7150HM2] (EXCHANGER-BLEED AIR PRECOOL)
423CT 423DT and 423ET.
F. Removal of the Ducts for the Leak Test of the PCE
(1) Remove the bellow (3) as follows:
(a) Remove the thermal protection (2) from the bellow (3).
(b) Record the position of the clamps (1) and (4) before the removal.
(c) Loosen the nuts of the clamps (1) and (4).
(d) Remove the clamps (1) and (4).
(e) Remove the bellow (3) from the PCE (7).
(f) Remove and discard the O-ring (5).
(g) Loosen the nut of the clamp (9).
(h) Remove the clamp (9).
(i) Remove and discard the O-ring (8).
(j) Remove the Overpressure Valve (OPV) from the Environmental Control System (ECS) interface duct (Ref. AMM TASK 36-11-53-000-802).
4. Procedure(1) Remove the bellow (3) as follows:
(a) Remove the thermal protection (2) from the bellow (3).
(b) Record the position of the clamps (1) and (4) before the removal.
(c) Loosen the nuts of the clamps (1) and (4).
(d) Remove the clamps (1) and (4).
(e) Remove the bellow (3) from the PCE (7).
(f) Remove and discard the O-ring (5).
(g) Loosen the nut of the clamp (9).
(h) Remove the clamp (9).
(i) Remove and discard the O-ring (8).
(j) Remove the Overpressure Valve (OPV) from the Environmental Control System (ECS) interface duct (Ref. AMM TASK 36-11-53-000-802).
Subtask 36-11-42-480-055-A ** ON A/C NOT FOR ALL
A. Installation of the Test Set
(a) Disconnect the Fan Air Valve (FAV) muscle line (6) and the Differential Pressure Sensor (DPS) down line (11) from the PCE (7).
(b) Install the SL PLUG ASSY (108) and the SL PLUG ASSY (110) on the ends of the disconnected lines (6) and (11).
(c) Install the DPS DWN ASSY (100) and the FAV PLUG ASSY (104) on the ports of the PCE (7) and tighten them with your hand.
(d) Install the RING (214) and the OUTLET FLANGE (202) on the downstream of the PCE (7).
(e) Install the RING (216) and the INLET FLANGE (204) on the upstream of the PCE (7) next to the ECS interface duct.
(f) Install the clamp (4) on the downstream of the PCE (7).
(g) Tighten the clamp (4).
(h) Disconnect the DPS sense line (10) from the PCE (7).
(i) Install the SL PLUG ASSY (106) on the end of the disconnected DPS sense line (10).
(j) Install the DPS UPS ASSY (102) on the port of the PCE (7) and tighten it with your hand.
(k) Connect the HOSE ASSY (702) to the INLET FLANGE (204).
(l) Install the O-ring (216) on the upstream of the PCE (7) next to the ECS interface duct.
(m) Install the INLET FLANGE (204) and the HOSE ASSY (702) on the upstream of the PCE (7) and tighten it with your hand.
(n) Install the clamp (9).
(o) Tighten the clamp (9).
(2) Connect all the parts of the 98L36109001000 LEAK TESTER-PCE,BLEED:
(a) Connect the PRESSURE TRANSMITTER (749) to the DPS UPS ASSY (102) on the upstream of the PCE (7).
(b) Tighten the PRESSURE TRANSMITTER (749) with your hand.
(c) Connect the HOSE EQUIPPED ASSY (40) to the HOSE ASSY (702).
(d) Connect the MEASUREMENT BOX (42) to the HOSE EQUIPPED ASSY (40) and to the PRESSURE TRANSMITTER (749).
(e) Connect the HOSE EQUIPPED ASSY (40) to the REGULATOR (704).
Subtask 36-11-42-790-056-A ** ON A/C NOT FOR ALL NOTE: To do this test, it is necessary to use a 98L36109001000 LEAK TESTER-PCE,BLEED and 98D36109002000 ADAPTOR SET-PCE,BLEED. The 98D36109002000 ADAPTOR SET-PCE,BLEED includes the blanking caps, plugs and the hose necessary for the leak test of the PCE (7).
(1) Connect all the parts of the 98D36109002000 ADAPTOR SET-PCE,BLEED: (a) Disconnect the Fan Air Valve (FAV) muscle line (6) and the Differential Pressure Sensor (DPS) down line (11) from the PCE (7).
(b) Install the SL PLUG ASSY (108) and the SL PLUG ASSY (110) on the ends of the disconnected lines (6) and (11).
(c) Install the DPS DWN ASSY (100) and the FAV PLUG ASSY (104) on the ports of the PCE (7) and tighten them with your hand.
(d) Install the RING (214) and the OUTLET FLANGE (202) on the downstream of the PCE (7).
(e) Install the RING (216) and the INLET FLANGE (204) on the upstream of the PCE (7) next to the ECS interface duct.
(f) Install the clamp (4) on the downstream of the PCE (7).
(g) Tighten the clamp (4).
(h) Disconnect the DPS sense line (10) from the PCE (7).
(i) Install the SL PLUG ASSY (106) on the end of the disconnected DPS sense line (10).
(j) Install the DPS UPS ASSY (102) on the port of the PCE (7) and tighten it with your hand.
(k) Connect the HOSE ASSY (702) to the INLET FLANGE (204).
(l) Install the O-ring (216) on the upstream of the PCE (7) next to the ECS interface duct.
(m) Install the INLET FLANGE (204) and the HOSE ASSY (702) on the upstream of the PCE (7) and tighten it with your hand.
(n) Install the clamp (9).
(o) Tighten the clamp (9).
(2) Connect all the parts of the 98L36109001000 LEAK TESTER-PCE,BLEED:
(a) Connect the PRESSURE TRANSMITTER (749) to the DPS UPS ASSY (102) on the upstream of the PCE (7).
(b) Tighten the PRESSURE TRANSMITTER (749) with your hand.
(c) Connect the HOSE EQUIPPED ASSY (40) to the HOSE ASSY (702).
(d) Connect the MEASUREMENT BOX (42) to the HOSE EQUIPPED ASSY (40) and to the PRESSURE TRANSMITTER (749).
(e) Connect the HOSE EQUIPPED ASSY (40) to the REGULATOR (704).
B. Leak Test of the PCE
(1) Open the REGULATORS (714) and (704).
(2) Connect the AIR SOURCE 5 BAR (72.5 PSI) to the REGULATOR (714) and pressurize to 60 psi (4.1 bar).
(3) Open the VALVES (705).
(5) If the leakage flow is more than 700 Nl/minute:
(a) Replace the PCE (7) (Ref. AMM TASK 36-11-42-000-802) and (Ref. AMM TASK 36-11-42-400-802).
(6) Close the AIR SOURCE 5 BAR (72.5 PSI).
(7) Close the VALVES (705).
(8) Close the REGULATORS (714) and (704).
Subtask 36-11-42-080-053-A ** ON A/C NOT FOR ALL (1) Open the REGULATORS (714) and (704).
(2) Connect the AIR SOURCE 5 BAR (72.5 PSI) to the REGULATOR (714) and pressurize to 60 psi (4.1 bar).
(3) Open the VALVES (705).
WARNING:
WHEN YOU USE COMPRESSED AIR:
(4) Do the test: - USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
- DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.
| ACTION | RESULT |
|---|---|
1.On the 98L36109001000 LEAK TESTER-PCE,BLEED:
| On the 98L36109001000 LEAK TESTER-PCE,BLEED:
|
2.On the MEASUREMENT BOX (42):
| On the MEASUREMENT BOX (42):
|
(a) Replace the PCE (7) (Ref. AMM TASK 36-11-42-000-802) and (Ref. AMM TASK 36-11-42-400-802).
(6) Close the AIR SOURCE 5 BAR (72.5 PSI).
(7) Close the VALVES (705).
(8) Close the REGULATORS (714) and (704).
C. Disconnection of the Test Set
(1) Disconnect all the parts of the 98L36109001000 LEAK TESTER-PCE,BLEED:
(b) Disconnect the HOSE EQUIPPED ASSY (40) from the HOSE ASSY (702).
(c) Disconnect the PRESSURE TRANSMITTER (749) from the DPS UPS ASSY (102).
(2) Disconnect all the parts of the 98D36109002000 ADAPTOR SET-PCE,BLEED:
(a) Loosen the clamp (9).
(b) Remove the clamp (9).
(c) Remove the INLET FLANGE (204) with the HOSE ASSY (702) from the air inlet of the PCE (7).
(d) Remove the RING (216) from the ECS interface duct next to the PCE (7) and discard it.
(e) Disconnect the HOSE ASSY (702) from the INLET FLANGE (204).
(f) Remove the SL PLUG ASSY (106) from the end of the DPS sense line (10).
(g) Remove the DPS UPS ASSY (102) from the PCE (7).
(h) Connect the DPS sense line (10) to the port of the PCE (7).
(i) TORQUE the nut of the DPS sense line (10) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ).
(j) Loosen the clamp (4).
(k) Remove the clamp (4) and the OUTLET FLANGE (202) from the PCE (7).
(l) Remove and discard the RING (214).
(m) Remove the FAV PLUG ASSY (104) and the DPS DWN ASSY (100) from the ports of the PCE (7).
(n) Remove the SL PLUG ASSY (108) and the SL PLUG ASSY (110) from the ends of the lines (6) and (11).
(o) Connect the FAV muscle line (6) to the PCE (7).
(p) Connect the DPS down line (11) to the PCE (7).
(q) TORQUE the nuts of the lines (6) and (11) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ).
Subtask 36-11-42-410-061-A ** ON A/C NOT FOR ALL (1) Disconnect all the parts of the 98L36109001000 LEAK TESTER-PCE,BLEED:
WARNING:
BE CAREFUL WHEN YOU DISCONNECT THE HOSE. THE HOSE WILL RELEASE THE REMAINING PRESSURE. THIS PRESSURE CAN CAUSE INJURY TO PERSONS.
(a) Disconnect the MEASUREMENT BOX (42) from the HOSE EQUIPPED ASSY (40) and the PRESSURE TRANSMITTER (749). (b) Disconnect the HOSE EQUIPPED ASSY (40) from the HOSE ASSY (702).
(c) Disconnect the PRESSURE TRANSMITTER (749) from the DPS UPS ASSY (102).
(2) Disconnect all the parts of the 98D36109002000 ADAPTOR SET-PCE,BLEED:
(a) Loosen the clamp (9).
(b) Remove the clamp (9).
(c) Remove the INLET FLANGE (204) with the HOSE ASSY (702) from the air inlet of the PCE (7).
(d) Remove the RING (216) from the ECS interface duct next to the PCE (7) and discard it.
(e) Disconnect the HOSE ASSY (702) from the INLET FLANGE (204).
(f) Remove the SL PLUG ASSY (106) from the end of the DPS sense line (10).
(g) Remove the DPS UPS ASSY (102) from the PCE (7).
(h) Connect the DPS sense line (10) to the port of the PCE (7).
(i) TORQUE the nut of the DPS sense line (10) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
. (j) Loosen the clamp (4).
(k) Remove the clamp (4) and the OUTLET FLANGE (202) from the PCE (7).
(l) Remove and discard the RING (214).
(m) Remove the FAV PLUG ASSY (104) and the DPS DWN ASSY (100) from the ports of the PCE (7).
(n) Remove the SL PLUG ASSY (108) and the SL PLUG ASSY (110) from the ends of the lines (6) and (11).
(o) Connect the FAV muscle line (6) to the PCE (7).
(p) Connect the DPS down line (11) to the PCE (7).
(q) TORQUE the nuts of the lines (6) and (11) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
. D. Installation of the Ducts Removed for the Leak Test of the PCE
(1) Install the bellow (3) as follows:
(a) Install the new AIPC 36-11-86-02-300 O-RING (5) on the PCE (7).
(b) Install the bellow (3) with the clamps (4) and (1).
(c) Tighten the clamps (4) and (1).
(2) Install a new AIPC 36-11-86-30-110 O-RING (8).
(3) Tighten the clamp (9).
(4) Install the OPV to the ECS interface duct (Ref. AMM TASK 36-11-53-400-802).
Subtask 36-11-42-865-072-A ** ON A/C NOT FOR ALL (1) Install the bellow (3) as follows:
(a) Install the new AIPC 36-11-86-02-300 O-RING (5) on the PCE (7).
(b) Install the bellow (3) with the clamps (4) and (1).
(c) Tighten the clamps (4) and (1).
(2) Install a new AIPC 36-11-86-30-110 O-RING (8).
(3) Tighten the clamp (9).
(4) Install the OPV to the ECS interface duct (Ref. AMM TASK 36-11-53-400-802).
E. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 36-11-42-790-057-A ** ON A/C NOT FOR ALL 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| FOR FIN: 7150HM1 (EXCHANGERBLEED AIR PRECOOL) | |||
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| FOR FIN: 7150HM2 (EXCHANGERBLEED AIR PRECOOL) | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
Subtask 36-11-42-410-060-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) Install these access panels:
(a) FOR [7150HM1] (EXCHANGER-BLEED AIR PRECOOL)
413CT 413DT and 413ET.
(b) FOR [7150HM2] (EXCHANGER-BLEED AIR PRECOOL)
423CT 423DT and 423ET.
(3) Remove the access platform(s).
Subtask 36-11-42-440-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install these access panels:
(a) FOR [7150HM1] (EXCHANGER-BLEED AIR PRECOOL)
413CT 413DT and 413ET.
(b) FOR [7150HM2] (EXCHANGER-BLEED AIR PRECOOL)
423CT 423DT and 423ET.
(3) Remove the access platform(s).
B. Reactivation of the Thrust Reverser System
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 36-11-42-942-054-A ** ON A/C NOT FOR ALL (1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).
C. Removal of Equipment
(1) Remove the WARNING NOTICE(S).
(2) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever on panel 114VU (Ref. AMM TASK 27-00-00-080-002).
(3) Remove all the fixtures, tools, test and support equipment used during this procedure.
(4) Put the aircraft back to its initial configuration.
Subtask 36-11-42-862-055-A ** ON A/C NOT FOR ALL (1) Remove the WARNING NOTICE(S).
(2) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever on panel 114VU (Ref. AMM TASK 27-00-00-080-002).
(3) Remove all the fixtures, tools, test and support equipment used during this procedure.
(4) Put the aircraft back to its initial configuration.