DOC AIRBUS | AMM A320FInstallation of the Bypass Duct, Inlet
TASK 21-58-61-400-802-A
Installation of the Bypass Duct, Inlet
Self explanatory
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 21-58-61-860-051-A ** ON A/C NOT FOR ALL Subtask 21-58-61-865-059-A ** ON A/C NOT FOR ALL
Subtask 21-58-61-420-051-A ** ON A/C NOT FOR ALL
Subtask 21-58-61-410-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:11:36 UTC
Installation of the Bypass Duct, Inlet
WARNING:
MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE.
HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
WARNING:
DO NOT TOUCH THE COMPONENT UNTIL IT IS SUFFICIENTLY
COOL TO PREVENT BURNS.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.06LDG2) | Non Hardening Jointing Putty-High Temp. Area - Structure |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191CB, 191DB, 191KB, 192KB |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 6 | NUT | AIPC 21-58-03-01-450 |
| 6 | LEAD | AIPC 21-58-03-01-460 |
| 15 | PACKING | AIPC 21-58-54-01-020 |
| 7 | SEAL | AIPC 21-58-54-01-085 |
| 17 | PACKING | AIPC 21-58-54-01-240 |
| 6 | SEAL | AIPC 21-58-83-01-660 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 20-28-00-912-803-A | Bonding Surface Preparation |
| TASK 21-58-00-710-002-A | Operational Test of the Conditioned Service Air System with Bleed Air |
| 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 53-35-13-000-002-A | Removal of the Quick-Release Access Panels from the Belly Fairing Structure |
| TASK 53-35-13-400-002-A | Installation of the Quick-Release Access Panels on the Belly Fairing Structure |
Bypass Duct, InletSubtask 21-58-61-860-051-A ** ON A/C NOT FOR ALL Subtask 21-58-61-865-059-A ** ON A/C NOT FOR ALL
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 21-58-61-941-054-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/X FEED/VALVE/BAT | 2HV | D13 |
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/ENG 1/CTL | 3HA1 | D12 |
| 49VU | AIR BLEED/ENG 1/MONG | 2HA1 | D11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | N28 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | P28 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | CSAS / CTRL | 1HW | U17 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR BLEED/ENG 2/CTL | 3HA2 | Z23 |
| 122VU | AIR BLEED/ENG 2/MONG | 2HA2 | Z22 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
C. Safety Precautions
(1) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (the OFF legend is on).
(b) Make sure that the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
(c) Make sure that the PACK 1 and the PACK 2 pushbutton switches are released (the OFF legends are on).
(d) Make sure that the HOT AIR pushbutton switch is released (the OFF legend is on).
(e) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate these pushbutton switches.
(2) At access doors 191CB and 191DB:
(a) On the LP and the HP ground connectors, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to supply the ground air.
Subtask 21-58-61-010-055-A ** ON A/C NOT FOR ALL (1) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the APU BLEED pushbutton switch is released (the OFF legend is on).
(b) Make sure that the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are released (the OFF legends are on).
(c) Make sure that the PACK 1 and the PACK 2 pushbutton switches are released (the OFF legends are on).
(d) Make sure that the HOT AIR pushbutton switch is released (the OFF legend is on).
(e) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate these pushbutton switches.
(2) At access doors 191CB and 191DB:
(a) On the LP and the HP ground connectors, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to supply the ground air.
D. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) in position at zone 191.
(2) Make sure that access panel(s) 191KB and/or 192KB is (are) removed (Ref. AMM TASK 53-35-13-000-002).
Subtask 21-58-61-865-054-A (1) Make sure that the ACCESS PLATFORM 2M (6 FT) in position at zone 191.
(2) Make sure that access panel(s) 191KB and/or 192KB is (are) removed (Ref. AMM TASK 53-35-13-000-002).
DELETED
4. ProcedureSubtask 21-58-61-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the Bypass Duct, Intlet
(1) Clean the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Apply a small quantity of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the new AIPC 21-58-54-01-020 PACKING (15) and AIPC 21-58-54-01-240 PACKING (17).
(5) Install the new packing (15) on the air duct (10).
(6) Install the new packing (17) on the air duct (10).
(7) Put the air duct (10) in position on the temperature control module (1).
(8) Install the screws (13) and the washers (14).
(9) Install the screws (18), the washers (11) and the nuts (12).
(10) Install the clamp (16).
(11) TORQUE the screws (13) to between 0.27 and 0.23 m.daN (23.89 and 20.35 lbf.in )
.
(12) TORQUE the nuts (12) to between 0.77 and 0.63 m.daN (68.14 and 55.75 lbf.in ).
(13) TORQUE the clamp (16) to between 0.57 and 0.51 m.daN (50.44 and 45.13 lbf.in ).
(14) Measure the value of A:
(16) Make sure that the value of C is between 72 mm (2.83 in.) and 74 mm (2.91 in.).
(17) Install a new AIPC 21-58-03-01-450 NUT (6) or AIPC 21-58-03-01-460 LEAD (6) or AIPC 21-58-83-01-660 SEAL (6) between the ducts (5) and (10).
(18) Install the seal (7) between the ducts (5) and (10).
(19) Install the screws (2), bonding straps (3) and (4), washers (8) and nuts (9) (Ref. AMM TASK 20-28-00-912-802).
(20) TORQUE the nuts (9) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ).
Subtask 21-58-61-420-051-B ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Apply a small quantity of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the new AIPC 21-58-54-01-020 PACKING (15) and AIPC 21-58-54-01-240 PACKING (17).
(5) Install the new packing (15) on the air duct (10).
(6) Install the new packing (17) on the air duct (10).
(7) Put the air duct (10) in position on the temperature control module (1).
(8) Install the screws (13) and the washers (14).
(9) Install the screws (18), the washers (11) and the nuts (12).
(10) Install the clamp (16).
(11) TORQUE the screws (13) to between 0.27 and 0.23 m.daN (23.89 and 20.35 lbf.in )
. (12) TORQUE the nuts (12) to between 0.77 and 0.63 m.daN (68.14 and 55.75 lbf.in )
. (13) TORQUE the clamp (16) to between 0.57 and 0.51 m.daN (50.44 and 45.13 lbf.in )
. (14) Measure the value of A:
- If value A is between 106 MM (4.17 IN.) and 107 MM (4.21 IN.), install seal (7) 3960-1011.
- If value A is between 105 MM (4.13 IN.) and 106 MM (4.17 IN.), install seal (7) 3960-1012.
- If value A is between 104 MM (4.09 IN.) and 105 MM (4.13 IN.), install seal (7) 3960-1013.
(16) Make sure that the value of C is between 72 mm (2.83 in.) and 74 mm (2.91 in.).
(17) Install a new AIPC 21-58-03-01-450 NUT (6) or AIPC 21-58-03-01-460 LEAD (6) or AIPC 21-58-83-01-660 SEAL (6) between the ducts (5) and (10).
(18) Install the seal (7) between the ducts (5) and (10).
(19) Install the screws (2), bonding straps (3) and (4), washers (8) and nuts (9) (Ref. AMM TASK 20-28-00-912-802).
(20) TORQUE the nuts (9) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in )
. A. Installation of the Bypass Duct, Inlet
(1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Apply a small quantity of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the new AIPC 21-58-54-01-020 PACKING (15) and AIPC 21-58-54-01-240 PACKING (17).
(7) Install the new packing (15) on the air duct (10).
(8) Install the new packing (17) on the air duct (10).
(9) Install a new AIPC 21-58-54-01-085 SEAL (7) on the duct (10).
(10) Install a new AIPC 21-58-03-01-450 SEAL (6) or a new AIPC 21-58-83-01-660 SEAL (6) on the duct (10).
(11) Put the air duct (10) in position on the temperature control module (1).
(12) Install the washers (14) and the screws (13).
(13) Install the washers (11), the screws (18) and the nuts (12).
(14) Install the clamp (16).
(15) Put the heat shield (19) in position on the duct (5).
(16) Install the bonding straps (3) and (4), screws (2), washers (8) and nuts (9).
(17) Tighten the nuts (9) and the nuts (12).
(18) Tighten the screws (13) and the clamp (16).
(19) Measure the value of dimension A:
(21) Make sure that the value of dimension C is between 72 mm (2.83 in.) and 74 mm (2.91 in.).
(22) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
Subtask 21-58-61-865-061-A ** ON A/C NOT FOR ALL (1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(5) Remove the PLUG-BLANKING from each disconnected line end.
(6) Apply a small quantity of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the new AIPC 21-58-54-01-020 PACKING (15) and AIPC 21-58-54-01-240 PACKING (17).
(7) Install the new packing (15) on the air duct (10).
(8) Install the new packing (17) on the air duct (10).
(9) Install a new AIPC 21-58-54-01-085 SEAL (7) on the duct (10).
(10) Install a new AIPC 21-58-03-01-450 SEAL (6) or a new AIPC 21-58-83-01-660 SEAL (6) on the duct (10).
(11) Put the air duct (10) in position on the temperature control module (1).
(12) Install the washers (14) and the screws (13).
(13) Install the washers (11), the screws (18) and the nuts (12).
(14) Install the clamp (16).
(15) Put the heat shield (19) in position on the duct (5).
(16) Install the bonding straps (3) and (4), screws (2), washers (8) and nuts (9).
(17) Tighten the nuts (9) and the nuts (12).
(18) Tighten the screws (13) and the clamp (16).
(19) Measure the value of dimension A:
- If the part number of the installed seal (7) is 3960-1011, then the value of dimension A is between 106 MM (4.17 IN.) and 107 MM (4.21 IN.).
- If the part number of the installed seal (7) is 3960-1012, then the value of dimension A is between 105 MM (4.13 IN.) and 106 MM (4.17 IN.).
- If the part number of the installed seal (7) is 3960-1013, then the value of dimension A is between 104 MM (4.09 IN.) and 105 MM (4.13 IN.).
(21) Make sure that the value of dimension C is between 72 mm (2.83 in.) and 74 mm (2.91 in.).
(22) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 21-58-61-865-055-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/X FEED/VALVE/BAT | 2HV | D13 |
| 49VU | AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC | 52HH | D08 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/ENG 1/CTL | 3HA1 | D12 |
| 49VU | AIR BLEED/ENG 1/MONG | 2HA1 | D11 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | AIR BLEED/ENG 2/MONG | 3HA2 | D12 |
| 49VU | AIR BLEED/ENG 1/CTL | 2HA1 | D11 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | N28 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | P28 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | CSAS / CTRL | 1HW | U17 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/115VAC | 49HH | X22 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN A/28VDC | 51HH | X21 |
| 122VU | AIR COND/TEMP CTL SYS 1/CHAN B/115VAC | 50HH | Y18 |
| 122VU | AIR BLEED/X FEED VALVE/NORM | 1HV | Z20 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR BLEED/ENG 2/CTL | 3HA2 | Z23 |
| 122VU | AIR BLEED/ENG 2/MONG | 2HA2 | Z22 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | AIR BLEED/ENG 1/MONG | 3HA1 | Z23 |
| 122VU | AIR BLEED/ENG 2/CTL | 2HA2 | Z22 |
DELETED
Subtask 21-58-61-710-051-A ** ON A/C NOT FOR ALL D. Leak Test
(b) Examine the air duct (10) for signs of air leakage.
(2) If necessary, repair the leak.
5. Close-upWARNING:
PUT ON PROTECTIVE GOGGLES AND THERMAL GLOVES WHEN YOU GO NEAR AN AIR-CONDITIONING PACK WHEN IT OPERATES. THERE CAN BE LEAKAGE OF HOT AIR, WHICH CAN CAUSE INJURIES.
(1) Do the two subsequent steps at the same time. NOTE: Two persons are necessary to do these steps.
(a) Do the operational test of the conditioned service air system with bleed air (Ref. AMM TASK 21-58-00-710-002). (b) Examine the air duct (10) for signs of air leakage.
(2) If necessary, repair the leak.
Subtask 21-58-61-410-052-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) Install the removed access panel(s) 191KB and/or 192KB (Ref. AMM TASK 53-35-13-400-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
Subtask 21-58-61-862-052-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 the removed access panel(s) 191KB and/or 192KB (Ref. AMM TASK 53-35-13-400-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).