DOC AIRBUS | AMM A320FInstallation of the Bottom Case Drain Hose/Tube Assembly
TASK 29-13-49-400-004-A
Installation of the Bottom Case Drain Hose/Tube Assembly
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 29-13-49-860-076-A ** ON A/C NOT FOR ALL
Subtask 29-13-49-420-057-A ** ON A/C NOT FOR ALL
Subtask 29-13-49-410-065-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:22:33 UTC
Installation of the Bottom Case Drain Hose/Tube Assembly
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING:
DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
CAUTION:
DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 195BB | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 12-12-29-611-002-A | Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-13-00-710-002-A | Operational Test of the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
Bottom Case Drain Hose/Tube AssemblySubtask 29-13-49-860-076-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-10-00-864-002)
(2) Make sure that the Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
(5) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the engine 1(2).
(6) Make sure that the fan-cowl door 447AL is open.
Subtask 29-13-49-941-070-A ** ON A/C NOT FOR ALL (1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-10-00-864-002)
(2) Make sure that the Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
- on the ground service panel 198CB.
(5) Make sure that an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the engine 1(2).
(6) Make sure that the fan-cowl door 447AL is open.
B. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
(6) Make sure that the CONTAINER 5 L (1.32 USGAL) is below the bottom case drain hose/tube.
Subtask 29-13-49-865-058-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU:
- Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to start the engine.
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:
- In the cockpit, on the HYD section of overhead panel 40VU.
- Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(6) Make sure that the CONTAINER 5 L (1.32 USGAL) is below the bottom case drain hose/tube.
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/MONG | 3700GD | Q37 |
Subtask 29-13-49-420-057-A ** ON A/C NOT FOR ALL
A. Installation of the Bottom Case-Drain Hose/Tube Assembly
(1) Remove the protective covers from the bottom case-drain hose (5), the hydraulic filter assembly and the union in the hydraulic pump.
(2) Loosely connect the bottom case-drain hose (5) to the hydraulic filter assembly. Do not TORQUE the coupling nut at this time.
(3) Loosely connect the bottom case-drain hose (5) to the union in the hydraulic pump. Do not TORQUE the coupling nut at this time.
(4) Install the center mount clamp (25) as follows:
(a) Remove the bolt (10), washer (15) and nut (20) from the band on the center mount clamp (25).
(b) Open the band on the center mount clamp (25) and put the bottom case-drain hose (5) into the hole in the insert.
(c) Put the band on the insert and install the bolt (10), washer (15) and nut (20).
(d) Make sure that the center mount clamp is installed at a distance of 12.30 in. (312.42 mm) below the flange of the suction hose/tube.
(e) Make sure that the center mount clamp and hoses have a minimum clearance of 0.40 in. (10.16 mm) from the CFMI hose.
(f) TORQUE the nut (20) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )
.
(5) Make sure that the bottom case-drain hose (5) is in the correct position.
.
(7) Remove the container.
Subtask 29-13-49-710-062-A ** ON A/C NOT FOR ALL (1) Remove the protective covers from the bottom case-drain hose (5), the hydraulic filter assembly and the union in the hydraulic pump.
(2) Loosely connect the bottom case-drain hose (5) to the hydraulic filter assembly. Do not TORQUE the coupling nut at this time.
(3) Loosely connect the bottom case-drain hose (5) to the union in the hydraulic pump. Do not TORQUE the coupling nut at this time.
(4) Install the center mount clamp (25) as follows:
(a) Remove the bolt (10), washer (15) and nut (20) from the band on the center mount clamp (25).
(b) Open the band on the center mount clamp (25) and put the bottom case-drain hose (5) into the hole in the insert.
(c) Put the band on the insert and install the bolt (10), washer (15) and nut (20).
(d) Make sure that the center mount clamp is installed at a distance of 12.30 in. (312.42 mm) below the flange of the suction hose/tube.
(e) Make sure that the center mount clamp and hoses have a minimum clearance of 0.40 in. (10.16 mm) from the CFMI hose.
(f) TORQUE the nut (20) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )
. (5) Make sure that the bottom case-drain hose (5) is in the correct position.
NOTE: You can use a second WRENCH - TORQUE to hold the fittings when you torque the coupling nuts. This prevents damage to the hose.
(6) TORQUE the coupling nuts of the bottom case-drain hose (5) to between 245 and 215 lbf.in (2.77 and 2.43 m.daN ) . (7) Remove the container.
B. Operational Test
(1) Pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
(2) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(3) During the dry motoring of the engine 2, make sure that there are no leaks from the suction hose/tube.
(4) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
5. Close-up(1) Pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
(2) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(3) During the dry motoring of the engine 2, make sure that there are no leaks from the suction hose/tube.
(4) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
Subtask 29-13-49-410-065-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Remove the container.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the left fan-cowl door (Ref. AMM TASK 71-13-00-410-040).
(a) FOR [1000EM2] (ENGINE-2)
close the door 447AL.
(6) Close the door 195BB.
(1) Remove the container.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the left fan-cowl door (Ref. AMM TASK 71-13-00-410-040).
(a) FOR [1000EM2] (ENGINE-2)
close the door 447AL.
(6) Close the door 195BB.