DOC AIRBUS | AMM A320FDeactivation of the Thrust Reverser System for Flight [IAE]
TASK 78-30-00-040-013-A
Deactivation of the Thrust Reverser System for Flight
MMEL 78-30-01A
THRUST REVERSER
This procedure supplies the data to deactivate (lockout) the thrust reverser system to release an aircraft with a thrust reverser that does not operate.
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 78-30-00-941-058-A ** ON A/C NOT FOR ALL
Subtask 78-30-00-040-055-A ** ON A/C NOT FOR ALL
Subtask 78-30-00-942-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:27:16 UTC
Deactivation of the Thrust Reverser System for Flight
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.
WARNING:
DO NOT CAUSE A BLOCKAGE OF THE HYDRAULIC CONTROL UNIT (HCU) RETURN PORT TO DEACTIVATE THE HCU. IF YOU CAUSE A BLOCKAGE OF THE HCU RETURN PORT THE THRUST REVERSER CAN OPERATE ACCIDENTLY AND CAUSE INJURY OR DAMAGE.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 210
ZONE: 400
FIN: 4101KS1 ** ON A/C NOT FOR ALL
FIN: 4101KS2 ** ON A/C NOT FOR ALL
Task Summary
1. Reason for the JobZONE: 400
FIN: 4101KS1 ** ON A/C NOT FOR ALL
FIN: 4101KS2 ** ON A/C NOT FOR ALL
Task Summary
| Access | Test | Specific Tools | Mhr | E/T | Nb Men |
|---|---|---|---|---|---|
| YES | YES | NO | 0.8 | 0.8 | 1 |
MMEL 78-30-01A
THRUST REVERSER
This procedure supplies the data to deactivate (lockout) the thrust reverser system to release an aircraft with a thrust reverser that does not operate.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | PLACARD |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-076) | methyl ethyl ketone, technical grade |
| (Material No.V10-094) | anti-seize compound |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 210 | CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD |
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| 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 78-32-00-860-011-A | Manual Retraction of the Thrust Reverser Translating Sleeves |
Hydraulic Control UnitSubtask 78-30-00-941-058-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred 5 minutes or more before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 78-30-00-010-058-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred 5 minutes or more before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
4. Procedure(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.
Subtask 78-30-00-040-055-A ** ON A/C NOT FOR ALL
A. Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU)
(a) Set the lockout lever (3) on the HCU (1) to the lockout position.
(b) Install the lockout pin (2) attached to the HCU (1) in the lockout hole of the HCU (1).
(2) Remove the access platform(s).
(3) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
Subtask 78-30-00-860-054-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) Stop the thrust reverser HCU with the storage lockout pin (2) attached to the HCU. (a) Set the lockout lever (3) on the HCU (1) to the lockout position.
(b) Install the lockout pin (2) attached to the HCU (1) in the lockout hole of the HCU (1).
(2) Remove the access platform(s).
(3) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
B. Measure the distance between the translating sleeve leading edge and the fan cowl aft edge.
(1) The distance must be between 0.03 in. (0.76 mm) and 0.25 in. (6.35 mm) for 80 percent of the measurements and between 0.03 in. (0.76 mm) and 0.31 in. (7.87 mm) for 20 percent of the measurements.
(a) If the distance is not correct:
1 Retract the two left and right translating sleeves.
a Make sure that the translating sleeves are in the fully retracted position. If they are not in the fully retracted position, manually move the translating sleeves to the fully retracted position (Ref. AMM TASK 78-32-00-860-011).
Subtask 78-30-00-040-093-A ** ON A/C NOT FOR ALL (1) The distance must be between 0.03 in. (0.76 mm) and 0.25 in. (6.35 mm) for 80 percent of the measurements and between 0.03 in. (0.76 mm) and 0.31 in. (7.87 mm) for 20 percent of the measurements.
(a) If the distance is not correct:
1 Retract the two left and right translating sleeves.
a Make sure that the translating sleeves are in the fully retracted position. If they are not in the fully retracted position, manually move the translating sleeves to the fully retracted position (Ref. AMM TASK 78-32-00-860-011).
- If the translating sleeve can not be moved to the fully retracted position, move the translating sleeve forward until one or the two actuator rod ends can be put in the mounting brackets. If only one actuator rod end can be put in the mounting brackets, you must adjust the other rod end (Ref. AMM TASK 78-30-00-820-010).
C. Lock the left and right translating sleeves.
PRE SBE 73-0222
(1) Remove the plug (18) from the lockout assembly (15) on the outer side of each translating sleeve.
(2) Remove the lockout pin (16) from the pin stowage bracket assembly (17) on the outer side of each translating sleeve.
(3) Clean the components:
(a) Clean the lockout pin (16) and the plug (18) with theV01-076 methyl ethyl ketone, technical grade
1 Wipe dry with a Textile-Lint free Cotton - (Material No.14SBA1) before theV01-076 methyl ethyl ketone, technical grade
(b) Apply the anti-seize compound (Material No.V10-094) to the lockout pin (16) and the plug (18).
(a) If the lockout pin cannot be fully installed because the holes are not aligned, align them:
1 Do a check of the rigging of the translating sleeve actuators (Ref. AMM TASK 78-30-00-820-010) Para.4.C.
(6) Do a test of the Linear Variable Differential Transducers (LVDTs) and make sure that they operate correctly on the deactivated reverser.
(a) Do the operational test of the thrust reverser system with the Centralized Fault Display System (CFDS) on the EEC channels A and B (Ref. AMM TASK 78-31-00-710-041):
1 During the operational test, make sure that the green or the amber "REV" indication in the Engine Pressure Ratio (EPR) indicator of the engine 1(2) does not show.
2 When the "FAULT DETECTED" page comes into view on the Multipurpose Control & Display Unit (MCDU) screen, push the return key two times to get the "GROUND SCANNING" menu.
(b) Make sure that these faults are not reported by "GROUND SCANNING":
END OF PRE SBE 73-0222
Subtask 78-30-00-040-056-A PRE SBE 73-0222
(1) Remove the plug (18) from the lockout assembly (15) on the outer side of each translating sleeve.
(2) Remove the lockout pin (16) from the pin stowage bracket assembly (17) on the outer side of each translating sleeve.
(3) Clean the components:
(a) Clean the lockout pin (16) and the plug (18) with the
1 Wipe dry with a Textile-Lint free Cotton - (Material No.14SBA1) before the
(b) Apply the anti-seize compound (Material No.V10-094) to the lockout pin (16) and the plug (18).
CAUTION:
MAKE SURE THAT THE HOLES IN THE C-DUCT AND THE TRANSLATING SLEEVE ARE CORRECTLY ALIGNED AND THE LOCKOUT PIN IS INSTALLED CORRECTLY. THERE IS A RISK THAT THE LOCKOUT PIN WILL NOT BE FULLY INSTALLED AND WILL NOT MECHANICALLY INHIBIT THE REVERSER.
(4) Install the lockout pin (16) in the lockout assembly (15) as shown in the figure. (a) If the lockout pin cannot be fully installed because the holes are not aligned, align them:
1 Do a check of the rigging of the translating sleeve actuators (Ref. AMM TASK 78-30-00-820-010) Para.4.C.
NOTE: The lockout pin will be above the receptacle when the pin will be installed.
(5) Install the plug (18) into the pin stowage bracket assembly (17) of each translating sleeve as shown in the figure. (6) Do a test of the Linear Variable Differential Transducers (LVDTs) and make sure that they operate correctly on the deactivated reverser.
(a) Do the operational test of the thrust reverser system with the Centralized Fault Display System (CFDS) on the EEC channels A and B (Ref. AMM TASK 78-31-00-710-041):
1 During the operational test, make sure that the green or the amber "REV" indication in the Engine Pressure Ratio (EPR) indicator of the engine 1(2) does not show.
2 When the "FAULT DETECTED" page comes into view on the Multipurpose Control & Display Unit (MCDU) screen, push the return key two times to get the "GROUND SCANNING" menu.
(b) Make sure that these faults are not reported by "GROUND SCANNING":
- "REV LVDT CHA/HC/EEC 1(2)."
- "REV LVDT CHB/HC/EEC 1(2)."
- "REV POS OR LVDT FAULT 1(2).".
NOTE: You can ignore the "T/R SOV/HCU/EEC 1(2)" or "HYD CONT UNIT/HC/EEC 1(2)" fault.
(c) Return the throttle lever to the "IDLE" position. WARNING:
MAKE SURE THAT THE "ENG 1(2) REVERSE UNLOCKED" AND "ENG 1(2) REV PRESSURIZED" ECAM WARNINGS ARE NOT SHOWN. THEY ARE SHOWN WHEN THE THRUST REVERSER DEACTIVATION IS NOT CORRECT AND THERE IS NO MECHANICAL OR HYDRAULIC INHIBITION OF THE THRUST REVERSER. THIS CAN CAUSE AN IN-FLIGHT DEPLOYMENT OF THE THRUST REVERSER.
(d) Push the return key until you exit the interactive mode and make sure that: - The "ECAM warning REV 1(2) INHIBITED" comes into view.
- The "ECAM warning ENG 1(2) REVERSE UNLOCKED" is not shown.
- The "ECAM warning ENG 1(2) REV PRESSURIZED" is not shown.
END OF PRE SBE 73-0222
DELETED
Subtask 78-30-00-860-059-A DELETED
5. Close-upSubtask 78-30-00-942-054-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On overhead maintenance panel 50VU, make sure that the ON legends of the FADEC GND PWR pusbutton switches are off.
Subtask 78-30-00-410-057-A ** ON A/C NOT FOR ALL (1) On overhead maintenance panel 50VU, make sure that the ON legends of the FADEC GND PWR pusbutton switches are off.
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Make sure that the fan cowls are closed (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(3) Make sure that the access platform(s) are removed.
(4) Remove the WARNING NOTICE(S).
(5) In the cockpit, on the pedestal, put the PLACARD adjacent to the applicable engine throttle lever to tell persons that the thrust reverser system is deactivated.
(6) Make an entry in the log book.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Make sure that the fan cowls are closed (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(3) Make sure that the access platform(s) are removed.
(4) Remove the WARNING NOTICE(S).
(5) In the cockpit, on the pedestal, put the PLACARD adjacent to the applicable engine throttle lever to tell persons that the thrust reverser system is deactivated.
(6) Make an entry in the log book.