DOC AIRBUS | AMM A320FDeactivation of the Thrust Reverser System for Flight [CFML]
TASK 78-30-00-040-808-A
Deactivation of the Thrust Reverser System for Flight
You must not do this task directly and independently from another deactivation task to dispatch the aircraft under MMEL or CDL. Refer to and do first the applicable AMM deactivation task which refers to this task.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 78-30-00-941-091-A
Subtask 78-30-00-040-075-A
Subtask 78-30-00-410-080-A
[Rev.10 from 2021]
2026.04.01 13:13:23 UTC
Deactivation of the Thrust Reverser System for Flight
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
ZONE: 400
1. Reason for the JobYou must not do this task directly and independently from another deactivation task to dispatch the aircraft under MMEL or CDL. Refer to and do first the applicable AMM deactivation task which refers to this task.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL00338) | MASTINOX D40 |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-803-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-803-A | Closing of the Fan Cowl Doors |
Hydraulic Deactivation of the Isolation Control Unit (ICU)Subtask 78-30-00-941-091-A
A. Safety Precautions
(1) 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:
(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 78-30-00-010-097-A (1) 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
- The ENG/MASTER 1(2) control switch.
(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).
B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position under the left fan cowl door.
4. Procedure(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position under the left fan cowl door.
Subtask 78-30-00-040-075-A
A. Deactivation of the Thrust Reverser
(1) Hydraulic inhibition:
(a) Remove the tethered pin (3) from the aft hole (5) of the inhibition lever (1).
(b) Move the inhibit lever (1) against the inhibit plunger (4).
(c) Check that "ICU INHIBITED" is now visible.
(d) Install the tethered pin (3) through the forward hole (6) in the ICU (2) and the inhibit lever (1).
(2) Mechanical inhibition:
(a) Installation of the inhibition secure pin (1):
1 Removal of the inhibition secure pin (1) from the storage bracket:
a Remove the screw (2), cover (3) and inhibition secure pin (1).
b Put the cover (3) back in position.
c Install the screw (2).
d TORQUE the screw (2) to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in ).
(b) Installation of the inhibition secure pin (1) in the inhibition hole on the lower beam (4):
1 Remove the screw (2) and the inhibition cover (3).
2 Install the inhibition secure pin (1) in the hole on the lower beam (4).
3 Put the inhibition cover (3) back in position.
4 Apply MASTINOX D40 (Material No.CPNCL00338) on the thread of the screw (2).
5 Install the screw (2).
6 TORQUE the screw (2) to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in ).
5. Close-up(1) Hydraulic inhibition:
(a) Remove the tethered pin (3) from the aft hole (5) of the inhibition lever (1).
(b) Move the inhibit lever (1) against the inhibit plunger (4).
(c) Check that "ICU INHIBITED" is now visible.
(d) Install the tethered pin (3) through the forward hole (6) in the ICU (2) and the inhibit lever (1).
(2) Mechanical inhibition:
(a) Installation of the inhibition secure pin (1):
1 Removal of the inhibition secure pin (1) from the storage bracket:
a Remove the screw (2), cover (3) and inhibition secure pin (1).
b Put the cover (3) back in position.
c Install the screw (2).
d TORQUE the screw (2) to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in )
. (b) Installation of the inhibition secure pin (1) in the inhibition hole on the lower beam (4):
1 Remove the screw (2) and the inhibition cover (3).
2 Install the inhibition secure pin (1) in the hole on the lower beam (4).
3 Put the inhibition cover (3) back in position.
4 Apply MASTINOX D40 (Material No.CPNCL00338) on the thread of the screw (2).
5 Install the screw (2).
6 TORQUE the screw (2) to between 0.374 and 0.306 m.daN (33.10 and 27.08 lbf.in )
. Subtask 78-30-00-410-080-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).