DOC AIRBUS | AMM A320FInspection of the Oil, Hydraulic and Water Drain Tubes [IAE]
TASK 71-73-49-200-010-A
Inspection of the Oil, Hydraulic and Water Drain Tubes
Self explanatory
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 71-73-49-941-068-A ** ON A/C NOT FOR ALL
Subtask 71-73-49-210-051-A ** ON A/C NOT FOR ALL
Subtask 71-73-49-410-069-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:31:04 UTC
Inspection of the Oil, Hydraulic and Water Drain Tubes
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:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | LIGHT SOURCE - INSPECTION |
| No specific | 1 | MIRROR - INSPECTION |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-002) | cleaning fluid |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| 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 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
Hydraulic and Water Drain TubesSubtask 71-73-49-941-068-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 71-73-49-010-084-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 cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
Subtask 71-73-49-040-053-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
C. Deactivate the thrust reverser.
Subtask 71-73-49-010-085-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) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012). D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 71-73-49-110-050-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
E. Clean the drain tubes
(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) to clear the tubes.
(2) Dry the tubes with a clean Textile-Lint free Cotton - (Material No.14SBA1) .
4. Procedure(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) to clear the tubes.
(2) Dry the tubes with a clean Textile-Lint free Cotton - (Material No.14SBA1) .
Subtask 71-73-49-210-051-A ** ON A/C NOT FOR ALL
A. Examination of the Drain Tubes:
(1) Examine the drain tubes (1) and (2) for security of attachment. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION
(a) If the drain tubes are loose, examine these items for damage, wear and loss of torque:
1 The attachment nuts and bolts.
2 The attachment clips.
3 The lockwire.
4 The tube connection nuts.
(b) If (some of) the above items have damage or wear, reject it (them).
(2) Examine the drain tubes (1) and (2) and their connections for signs of leaks. No leaks are permitted. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION
(a) If signs of leaks are found
1 Examine the tube connection nuts for loss of torque.
2 If there is a loss of torque examine the tube connection nuts and the tube end fitting for damage and wear. If they have damage or wear, reject them.
(3) Examine the general condition of the drain tubes (1) and (2). Use the inspection lamp and the inspection mirror
(a) Examine the tubes for cracks
1 If the tube(s) has (have) cracks reject it (them).
(b) Examine the tubes for dents.
1 If the tube(s) has(have) dents do the following:
a Dents with smooth contours which do not decrease the diameter of the tube more than 10 percent, accept the damage.
b Dents with sharp contours or which decrease the diameter of the tube more than 10 percent, reject the tube.
c Dents which are more than 1 in. (25.40 mm) apart and up to 0.05 in. (1.27 mm) deep with the radius of the dent not less than 0.056 in. (1.42 mm), accept the tube.
d Dents which are less than 1 in. (25.40 mm) apart and more than 0.05 in. (1.27 mm) deep or the radius of the dent less than 0.056 in. (1.42 mm), reject the tube.
(c) Examine the tubes for damage (nicks, scratches, scores and fretting).
1 If the tube(s) has(have) damage (nicks, scratches, scores and fretting), do the following:
a Up to 0.014 in. (0.36 mm) in depth with smooth contours, accept the damage.
b Damage which does not have smooth contours or is more than 0.014 in. (0.36 mm) in depth, reject the tube.
5. Close-up(1) Examine the drain tubes (1) and (2) for security of attachment. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION
(a) If the drain tubes are loose, examine these items for damage, wear and loss of torque:
1 The attachment nuts and bolts.
2 The attachment clips.
3 The lockwire.
4 The tube connection nuts.
(b) If (some of) the above items have damage or wear, reject it (them).
(2) Examine the drain tubes (1) and (2) and their connections for signs of leaks. No leaks are permitted. Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION
(a) If signs of leaks are found
1 Examine the tube connection nuts for loss of torque.
2 If there is a loss of torque examine the tube connection nuts and the tube end fitting for damage and wear. If they have damage or wear, reject them.
(3) Examine the general condition of the drain tubes (1) and (2). Use the inspection lamp and the inspection mirror
(a) Examine the tubes for cracks
1 If the tube(s) has (have) cracks reject it (them).
(b) Examine the tubes for dents.
1 If the tube(s) has(have) dents do the following:
a Dents with smooth contours which do not decrease the diameter of the tube more than 10 percent, accept the damage.
b Dents with sharp contours or which decrease the diameter of the tube more than 10 percent, reject the tube.
c Dents which are more than 1 in. (25.40 mm) apart and up to 0.05 in. (1.27 mm) deep with the radius of the dent not less than 0.056 in. (1.42 mm), accept the tube.
d Dents which are less than 1 in. (25.40 mm) apart and more than 0.05 in. (1.27 mm) deep or the radius of the dent less than 0.056 in. (1.42 mm), reject the tube.
(c) Examine the tubes for damage (nicks, scratches, scores and fretting).
1 If the tube(s) has(have) damage (nicks, scratches, scores and fretting), do the following:
a Up to 0.014 in. (0.36 mm) in depth with smooth contours, accept the damage.
b Damage which does not have smooth contours or is more than 0.014 in. (0.36 mm) in depth, reject the tube.
Subtask 71-73-49-410-069-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(4) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 71-73-49-440-052-A ** ON A/C NOT FOR ALL Subtask 71-73-49-410-070-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(4) FOR [1000EM2] (ENGINE-2)
461AL 462AR.