DOC AIRBUS | AMM A320FPreparation of the Aircraft for Flight with a Failed or Missing Ground Door Opening Cable
TASK 32-12-00-040-006-A
Preparation of the Aircraft for Flight with a Failed or Missing Ground Door Opening Cable
MMEL 32-12-01A
MAIN GEAR DOOR GROUND OPENING CABLE
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 32-12-00-941-067-A
(Ref. AMM TASK 29-00-00-910-002).
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) On the panel 400VU:
(4) On the panel 110VU, make sure that the GRAVITY GEAR EXTN handle is folded into the center console.
(5) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
Subtask 32-12-00-860-071-A
Subtask 32-12-00-020-067-B
(a) Disconnect the cable end (2) from the control handle as follows:
1 Remove and discard the cotter pin (5).
2 Remove the nut (4), the washer (3) and the bolt (1).
3 Remove the cable end (2) from the control handle.
4 Safety the cable end (2) in position with the TIE WRAP.
(b) Disconnect the cable end (6) from the bypass valve as follows:
1 Remove and discard the cotter pin (8).
2 Remove the nut (7), the washer (9), the bush (11) and the bolt (12).
3 Remove the cable end (6) from the bypass valve operating-lever (10).
4 Safety the cable end (6) in position with the TIE WRAP.
(2) Make sure that the 460005835 SLEEVE - GROUND LOCK is installed on the applicable MLG door actuating-cylinder (Ref. AMM TASK 32-00-00-481-002).
(3) Disconnect the applicable MLG door actuating-cylinder from the MLG door (Ref. AMM TASK 32-31-35-000-001).
(4) Hold the body of the MLG door actuating-cylinder to prevent damage because of small movement of the ram.
(5) Do the flight configuration precautions with electrical power (Ref. AMM TASK 32-00-00-860-001).
(6) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
(a) On panel 110VU:
1 Turn the GRAVITY GEAR EXTN handle three full turns counterclockwise at a rate of one full turn in five seconds.
2 Fold the GRAVITY GEAR EXTN handle into the center console.
3 Make sure that the applicable MLG door are closed and locked.
(8) Make sure that the bypass valve operating-lever (10) is in the correct position as follows:
(a) Put the 98DNSA20208040 RIGGING PIN through the rigging pin holes in the operating lever (10) and the bypass valve.
(b) If 98DNSA20208040 RIGGING PIN installation is not possible (because the rigging pin holes in the operating lever (10) and the bypass valve are not aligned), do the steps that follow:
1 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
3 Put the 98DNSA20208040 RIGGING PIN through the rigging pin holes in the operating lever (10) and the bypass valve.
4 Open, safety and tag this(these) circuit breaker(s):
(d) Safety the operating lever (10) in the rigged position with14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
1 Make sure that the rigging pin holes in the operating lever (10) and the bypass valve are aligned.
2 Make a loop of the lockwire around the union of port A.
3 Do the lockwire routing behind the unions and then above the union of port B.
4 Make a loop of the lockwire through the rigging pin hole of the operating lever (10).
5 Do the lockwire routing above the union of port B. Make one more loop of the lockwire around the union of port A.
6 Make a last loop of the lockwire through the rigging pin hole and safety the operating lever (10).
7 If necessary, cut and discard the unwanted length of the lockwire.
(9) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
(10) On panel 110VU, turn the GRAVITY GEAR EXTN handle clockwise two full turns.
(11) Connect the applicable MLG door actuating-cylinder (Ref. AMM TASK 32-31-35-400-001).
(12) Remove the 460005835 SLEEVE - GROUND LOCK from the MLG door actuating-cylinders (Ref. AMM TASK 32-00-00-081-002).
(13) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
(14) Close the MLG doors as follows:
(a) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
(c) Fold the GRAVITY GEAR EXTN handle into the center console.
(15) Put the MLG door ground control-handle in the CLOSED position.
(16) Make sure that the MLG doors are closed and locked correctly.
(Ref. AMM TASK 29-10-00-864-001).
5. Close-up
Subtask 32-12-00-410-055-A
[Rev.10 from 2021]
2026.04.01 00:41:08 UTC
Preparation of the Aircraft for Flight with a Failed or Missing Ground Door Opening Cable
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:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobMMEL 32-12-01A
MAIN GEAR DOOR GROUND OPENING CABLE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | TIE WRAP |
| No specific | AR | WARNING NOTICE(S) |
| 460005835 | 2 | SLEEVE - GROUND LOCK |
| 98DNSA20208040 | 1 | RIGGING PIN |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 734 | MAIN DOOR |
| 744 | MAIN DOOR |
| FOR [2804GM] (CABLE CONTROL) | |
| 195BB | |
| FOR [2805GM] (CABLE CONTROL) | |
| 196BB | |
| REFERENCE | DESIGNATION |
|---|---|
| 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 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-863-001-A | Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-860-002-A | Connection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 32-00-00-081-002-A | Removal of the Safety Devices from the Landing Gear Doors |
| TASK 32-00-00-481-001-A | Installation of the Safety Devices on the Landing Gears |
| TASK 32-00-00-481-002-A | Installation of the Safety Devices on the Landing Gear Doors |
| TASK 32-00-00-860-001-A | Flight Configuration Precautions with Electrical Power |
| TASK 32-00-00-860-001-A-01 | Flight Configuration Precautions without Electrical Power |
| TASK 32-00-00-860-002-A | Ground Configuration after Flight Configuration with Electrical Power |
| TASK 32-00-00-860-002-A-01 | Ground Configuration after Flight Configuration without Electrical Power |
| TASK 32-12-16-000-001-A | Removal of the Control Cable |
| TASK 32-31-35-000-001-A | Removal of the MLG Door Actuating-Cylinder |
| TASK 32-31-35-400-001-A | Installation of the MLG Door Actuating-Cylinder |
| TASK 32-33-00-720-001-A | Functional Check of Free-Fall Extension |
MLG Door Ground-Opening SystemSubtask 32-12-00-941-067-A
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
A. Safety Precautions(Ref. AMM TASK 29-00-00-910-002).
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) On the panel 400VU:
- make sure that the landing-gear control-lever 6GA is in the DOWN position
- put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
(4) On the panel 110VU, make sure that the GRAVITY GEAR EXTN handle is folded into the center console.
(5) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
B. Aircraft Maintenance Configuration
(2) Depressurize the Green Hydraulic system (Ref. AMM TASK 29-10-00-864-001).
Subtask 32-12-00-865-072-A WARNING:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
(1) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002). (2) Depressurize the Green Hydraulic system (Ref. AMM TASK 29-10-00-864-001).
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 32-12-00-010-063-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R33 |
| 121VU | LGCIU/BAT SPLY/SYS1 | 58GA | R32 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R32 |
| 121VU | LGCIU/BAT SPLY/SYS1 | 58GA | R31 |
D. Get Access
(1) Put an ACCESS PLATFORM 2M (6 FT) below the applicable zone 730(740).
(2) Open the applicable access panel(s):
(a) FOR [2804GM] (CABLE CONTROL)
- open 195BB
(b) FOR [2805GM] (CABLE CONTROL)
- open 196BB.
(3) If necessary, open the MLG doors by the free-fall system (Ref. AMM TASK 32-33-00-720-001).
(4) Install a 460005835 SLEEVE - GROUND LOCK on each MLG door actuating cylinder (Ref. AMM TASK 32-00-00-481-002).
(5) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
4. Procedure(1) Put an ACCESS PLATFORM 2M (6 FT) below the applicable zone 730(740).
(2) Open the applicable access panel(s):
(a) FOR [2804GM] (CABLE CONTROL)
- open 195BB
(b) FOR [2805GM] (CABLE CONTROL)
- open 196BB.
(3) If necessary, open the MLG doors by the free-fall system (Ref. AMM TASK 32-33-00-720-001).
(4) Install a 460005835 SLEEVE - GROUND LOCK on each MLG door actuating cylinder (Ref. AMM TASK 32-00-00-481-002).
(5) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
Subtask 32-12-00-020-067-B
WARNING:
MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
WARNING:
USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
A. Deactivation of the MLG Ground Door Opening-Cable NOTE: The defective cable can be removed or can stay with the cable ends disconnected from the control handle and bypass valve. If disconnected, the cable ends must be safetied correctly.
(1) Remove the defective cable (Ref. AMM TASK 32-12-16-000-001), or disconnect the cable ends as follows: (a) Disconnect the cable end (2) from the control handle as follows:
1 Remove and discard the cotter pin (5).
2 Remove the nut (4), the washer (3) and the bolt (1).
3 Remove the cable end (2) from the control handle.
4 Safety the cable end (2) in position with the TIE WRAP.
(b) Disconnect the cable end (6) from the bypass valve as follows:
1 Remove and discard the cotter pin (8).
2 Remove the nut (7), the washer (9), the bush (11) and the bolt (12).
3 Remove the cable end (6) from the bypass valve operating-lever (10).
4 Safety the cable end (6) in position with the TIE WRAP.
(2) Make sure that the 460005835 SLEEVE - GROUND LOCK is installed on the applicable MLG door actuating-cylinder (Ref. AMM TASK 32-00-00-481-002).
(3) Disconnect the applicable MLG door actuating-cylinder from the MLG door (Ref. AMM TASK 32-31-35-000-001).
(4) Hold the body of the MLG door actuating-cylinder to prevent damage because of small movement of the ram.
(5) Do the flight configuration precautions with electrical power (Ref. AMM TASK 32-00-00-860-001).
(6) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
CAUTION:
DO NOT TURN THE GRAVITY GEAR EXTENSION HANDLE MORE THAN 3 FULL TURNS. THIS CAN CAUSE DAMAGE TO THE FREE FALL EXTENSION SYSTEM.
(7) If you used the free-fall system to open the MLG doors, do the reset of the free-fall extension system as follows:(a) On panel 110VU:
1 Turn the GRAVITY GEAR EXTN handle three full turns counterclockwise at a rate of one full turn in five seconds.
2 Fold the GRAVITY GEAR EXTN handle into the center console.
3 Make sure that the applicable MLG door are closed and locked.
(8) Make sure that the bypass valve operating-lever (10) is in the correct position as follows:
(a) Put the 98DNSA20208040 RIGGING PIN through the rigging pin holes in the operating lever (10) and the bypass valve.
(b) If 98DNSA20208040 RIGGING PIN installation is not possible (because the rigging pin holes in the operating lever (10) and the bypass valve are not aligned), do the steps that follow:
1 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
- 1GA
- 52GA
- 58GA.
3 Put the 98DNSA20208040 RIGGING PIN through the rigging pin holes in the operating lever (10) and the bypass valve.
4 Open, safety and tag this(these) circuit breaker(s):
- 1GA
- 52GA
- 58GA.
(d) Safety the operating lever (10) in the rigged position with
1 Make sure that the rigging pin holes in the operating lever (10) and the bypass valve are aligned.
2 Make a loop of the lockwire around the union of port A.
3 Do the lockwire routing behind the unions and then above the union of port B.
4 Make a loop of the lockwire through the rigging pin hole of the operating lever (10).
5 Do the lockwire routing above the union of port B. Make one more loop of the lockwire around the union of port A.
6 Make a last loop of the lockwire through the rigging pin hole and safety the operating lever (10).
7 If necessary, cut and discard the unwanted length of the lockwire.
(9) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
(10) On panel 110VU, turn the GRAVITY GEAR EXTN handle clockwise two full turns.
(11) Connect the applicable MLG door actuating-cylinder (Ref. AMM TASK 32-31-35-400-001).
(12) Remove the 460005835 SLEEVE - GROUND LOCK from the MLG door actuating-cylinders (Ref. AMM TASK 32-00-00-081-002).
(13) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
(14) Close the MLG doors as follows:
(a) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
- 1GA
- 52GA
- 58GA.
(c) Fold the GRAVITY GEAR EXTN handle into the center console.
(15) Put the MLG door ground control-handle in the CLOSED position.
(16) Make sure that the MLG doors are closed and locked correctly.
WARNING:
IF THE MLG DOOR CONTROLS DO NOT AGREE WITH THE POSITION OF THE MLG DOORS, YOU MUST KEEP CLEAR OF THE LANDING GEAR BAY UNTIL:
(17) Depressurize the Green hydraulic system- YOU DEPRESSURIZE THE GREEN HYDRAULIC SYSTEM
- YOU INSTALL A GROUND LOCK SLEEVE ON THE ACTUATING CYLINDER OF THE APPLICABLE OPEN DOOR(S). IF THE DOOR IS OPEN AND NOT SAFETIED, THERE IS A RISK THAT IT CAN CLOSE AND CAUSE INJURY.
(Ref. AMM TASK 29-10-00-864-001).
Subtask 32-12-00-410-055-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the applicable access panel(s):
(a) FOR [2804GM] (CABLE CONTROL)
- close 195BB
(b) FOR [2805GM] (CABLE CONTROL)
- close 196BB.
Subtask 32-12-00-865-073-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the applicable access panel(s):
(a) FOR [2804GM] (CABLE CONTROL)
- close 195BB
(b) FOR [2805GM] (CABLE CONTROL)
- close 196BB.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-12-00-860-072-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | H12 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/CTL | 1701GK | R35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R34 |
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R33 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/G HYD/PUMP ENG1/MONG | 1702GK | R33 |
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R32 |
C. Aircraft Maintenance Configuration
(1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(2) Do the ground configuration after flight configuration with electrical power (Ref. AMM TASK 32-00-00-860-002).
(3) Make an applicable entry in the aircraft technical log.
Subtask 32-12-00-942-065-A (1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(2) Do the ground configuration after flight configuration with electrical power (Ref. AMM TASK 32-00-00-860-002).
(3) Make an applicable entry in the aircraft technical log.
D. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Remove the SAFETY BARRIER(S).
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.