DOC AIRBUS | AMM A320FInstallation of the Left Translating Cowl [IAE]
TASK 78-32-46-400-010-A
Installation of the Left Translating Cowl
1. Reason for the Job
Self explanatory
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 78-32-46-860-050-A ** ON A/C NOT FOR ALL
Subtask 78-32-46-480-051-A ** ON A/C NOT FOR ALL
Subtask 78-32-46-410-053-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:28:41 UTC
Installation of the Left Translating Cowl
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 80 and 60 lbf.in (0.90 and 0.68 m.daN )  | |
| IAE1N20011 | 1 | HANDLING TOOL-LH |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| 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 78-30-00-820-010-A | Rigging of the Thrust Reverser System |
| TASK 78-31-00-710-041-A | Operational Test of the Thrust Reverser System with the CFDS |
| TASK 78-31-00-710-041-A-02 | Operational test of the Thrust Reverser without the CFDS and Engine Running |
| 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 78-32-42-400-010-A | Installation of the Left Thrust Reverser Blocker Door Drag Links |
| TASK 78-32-43-400-010-A | Installation of the C-Duct Locking Actuator |
| TASK 78-32-45-400-010-A | Installation of the Left Thrust Reverser Blocker Doors |
| TASK 78-32-48-400-010-A | Installation of the C-Duct Non-Locking Actuator |
Translating Cowl Handling ToolSubtask 78-32-46-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 78-32-46-040-051-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
B. Make sure that the Thrust Reversers are deactivated
Subtask 78-32-46-010-054-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) Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012). C. Make sure the thrust reverser halves are open to a minimum distance, so that the latches will not touch each other when the translating cowl is installed (Ref. AMM TASK 78-32-00-010-010).
Subtask 78-32-46-420-050-A ** ON A/C NOT FOR ALL D. Install the five blocker doors and drag links on the translating cowl (Ref. AMM TASK 78-32-42-400-010) (Ref. AMM TASK 78-32-45-400-010).
4. ProcedureSubtask 78-32-46-480-051-A ** ON A/C NOT FOR ALL
A. Attach the left translating cowl handling tool (2), IAE1N20011 HANDLING TOOL-LH to the translating cowl (1) at the three hoist fittings.
Subtask 78-32-46-420-051-A ** ON A/C NOT FOR ALL B. Align the Translating Cowl
Subtask 78-32-46-080-050-A ** ON A/C NOT FOR ALL CAUTION:
MAKE SURE THE THRUST REVERSER HALVES ARE OPEN TO A MINIMUM DISTANCE, SO THAT THE TRANSLATING SLEEVE LATCHES WILL NOT TOUCH WHEN THE TRANSLATING COWL IS INSTALLED.
(1) Align the translating cowl sliders with the C-duct tracks. Carefully move the translating cowl forward until it touches the forward edge of the C-duct. C. Remove the left translating cowl handling tool (2), IAE1N20011 HANDLING TOOL-LH from the translating cowl (1).
Subtask 78-32-46-420-052-A ** ON A/C NOT FOR ALL D. Attach the ends of the locking and non locking actuators to the translating cowl brackets (Ref. AMM TASK 78-32-43-400-010) (Ref. AMM TASK 78-32-48-400-010).
(1) Remove the tape from the locking and non locking actuator rod ends. Do not let the actuator rod ends turn.
(2) Install the bolts and bushings that attach the ends of the locking and non locking actuators to the translating cowl brackets.
(3) TORQUE the rod end retaining bolts to between 80 and 60 lbf.in (0.90 and 0.68 m.daN ).
Subtask 78-32-46-410-051-A ** ON A/C NOT FOR ALL (1) Remove the tape from the locking and non locking actuator rod ends. Do not let the actuator rod ends turn.
(2) Install the bolts and bushings that attach the ends of the locking and non locking actuators to the translating cowl brackets.
(3) TORQUE the rod end retaining bolts to between 80 and 60 lbf.in (0.90 and 0.68 m.daN )
. E. Install the two actuator access panels 451BL, 451CL, 452BR, 452CR (461BL, 461CL, 462BR, 462CR) on the outer side of the translating cowl (Ref. AMM TASK 78-32-43-400-010) (Ref. AMM TASK 78-32-48-400-010).
Subtask 78-32-46-010-055-A ** ON A/C NOT FOR ALL F. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 78-32-46-420-053-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
G. Attach the five blocker-door drag links to the thrust reverser inner barrel (Ref. AMM TASK 78-32-42-400-010).
Subtask 78-32-46-820-051-A ** ON A/C NOT FOR ALL H. Rig the translating sleeves, actuators, actuator supports and translating sleeve aft double latches (Ref. AMM TASK 78-30-00-820-010)
5. Close-upSubtask 78-32-46-410-053-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 78-32-46-440-050-A ** ON A/C NOT FOR ALL Subtask 78-32-46-410-055-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.
C. Close Access
(1) Close the fan cowl (Ref. AMM TASK 71-13-00-410-010).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
Subtask 78-32-46-710-050-A ** ON A/C NOT FOR ALL (1) Close the fan cowl (Ref. AMM TASK 71-13-00-410-010).
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the WARNING NOTICE(S).
D. Operational Test
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).
(1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).
NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).