DOC AIRBUS | AMM A320FCleaning Tubes-Oil, Hydraulic and Water Drain [CFMI]
TASK 71-73-49-200-041-A
Cleaning Tubes-Oil, Hydraulic and Water Drain
1. Reason for the Job
To clean the drain tubes.
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 71-73-49-941-071-A ** ON A/C NOT FOR ALL
Subtask 71-73-49-160-051-A ** ON A/C NOT FOR ALL
Subtask 71-73-49-420-077-A ** ON A/C NOT FOR ALL Subtask 71-73-49-410-073-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:24:20 UTC
Cleaning Tubes-Oil, Hydraulic and Water Drain
1. Reason for the Job
To clean the drain tubes.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | BRUSH - BRISTLED |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 71-73-49-000-040-A | Removal of the Oil Tank Drain Tube and Hose |
| TASK 71-73-49-400-040-A | Installation of the Oil Tank Drain Tube and Hose |
Tubes-Oil, Hydraulic and Water DrainSubtask 71-73-49-941-071-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 not less than 5 minutes 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 71-73-49-010-088-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 not less than 5 minutes 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. Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 71-73-49-020-079-A ** ON A/C NOT FOR ALL 4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 71-73-49-160-051-A ** ON A/C NOT FOR ALL
A. Clean the tubes as follows:
(1) If the tube is blocked use controlled air supply 30 +5 -5 psi (2 +0.3 -0.3 bar) to clear the tubing of blockage.
(2) If the blockage can not be cleared by the use of controlled air, use a clean piece of cloth attached to a length of wire to clear the blockage.
(3) Remove loose dirt from the exterior of the tube with a clean moist cloth.
(4) Dry the surface of the tube with a clean cloth.
(5) For hard to remove dirt or stain use a BRUSH - BRISTLED.
5. Close-up(1) If the tube is blocked use controlled air supply 30 +5 -5 psi (2 +0.3 -0.3 bar) to clear the tubing of blockage.
(2) If the blockage can not be cleared by the use of controlled air, use a clean piece of cloth attached to a length of wire to clear the blockage.
(3) Remove loose dirt from the exterior of the tube with a clean moist cloth.
(4) Dry the surface of the tube with a clean cloth.
(5) For hard to remove dirt or stain use a BRUSH - BRISTLED.
Subtask 71-73-49-420-077-A ** ON A/C NOT FOR ALL Subtask 71-73-49-410-073-A ** ON A/C NOT FOR ALL