DOC AIRBUS | AMM A320FExamine the Engine Fuel Drain Tubes [IAE]
TASK 71-71-49-200-010-A
Examine the Engine Fuel Drain Tubes
This task gives the procedure for a general check of the engine fuel drain tubes without component removal.
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 71-71-49-941-050-A ** ON A/C NOT FOR ALL
Subtask 71-71-49-110-050-A ** ON A/C NOT FOR ALL
Subtask 71-71-49-410-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:31:03 UTC
Examine the Engine Fuel 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.
1. Reason for the JobThis task gives the procedure for a general check of the engine fuel drain tubes without component removal.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| 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 |
Core Engine Fuel Drain TubesSubtask 71-71-49-941-050-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 71-71-49-010-051-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. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(4) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 71-71-49-040-050-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(4) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
C. Deactivate the thrust reverser.
Subtask 71-71-49-010-050-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.
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 71-71-49-110-050-A ** ON A/C NOT FOR ALL
A. Clean the fuel tubes
(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) and clean the tubes (1), (2), (3) and (4).
(2) Dry the tubes with a clean lint free cloth.
Subtask 71-71-49-210-050-A ** ON A/C NOT FOR ALL (1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) and clean the tubes (1), (2), (3) and (4).
(2) Dry the tubes with a clean lint free cloth.
B. Examine the engine fuel drain tubes:
(1) Examine the fuel tubes for security of attachment
(a) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and examine the fuel tubes (1), (2), (3) and (4) for security of attachment.
(b) If the fuel 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 wire.
4 The union nuts and tube end fittings.
(c) Reject items that are worn or damaged.
(2) Examine the fuel drain tubes for signs of leaks
(a) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and examine the fuel drain tubes (1), (2), (3) and (4) connections for signs of leaks. Leaks are not permitted.
(b) If signs of leaks are found:
1 Check the union nuts for a loss of torque. If the union nuts are loose, examine the tube end fittings and union nuts for wear and damage. Reject tubes with damaged or worn union nuts or tube end fittings.
(3) Examine the general condition of the fuel drain tubes
(a) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and examine the fuel drain tubes (1), (2), (3) and (4) for:
1 Cracks.
2 Dents.
3 Damage (nicks, scratches, scores and fretting).
(b) If the drain tubes have cracks, dents or damage, do the steps that follow:
1 Cracks:
a If a tube is cracked, reject it.
2 Dents:
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 more 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.
3 Damage (nicks, scratches, scores and fretting):
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 fuel tubes for security of attachment
(a) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and examine the fuel tubes (1), (2), (3) and (4) for security of attachment.
(b) If the fuel 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 wire.
4 The union nuts and tube end fittings.
(c) Reject items that are worn or damaged.
(2) Examine the fuel drain tubes for signs of leaks
(a) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and examine the fuel drain tubes (1), (2), (3) and (4) connections for signs of leaks. Leaks are not permitted.
(b) If signs of leaks are found:
1 Check the union nuts for a loss of torque. If the union nuts are loose, examine the tube end fittings and union nuts for wear and damage. Reject tubes with damaged or worn union nuts or tube end fittings.
(3) Examine the general condition of the fuel drain tubes
(a) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION and examine the fuel drain tubes (1), (2), (3) and (4) for:
1 Cracks.
2 Dents.
3 Damage (nicks, scratches, scores and fretting).
(b) If the drain tubes have cracks, dents or damage, do the steps that follow:
1 Cracks:
a If a tube is cracked, reject it.
2 Dents:
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 more 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.
3 Damage (nicks, scratches, scores and fretting):
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 71-71-49-410-051-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 71-71-49-440-050-A ** ON A/C NOT FOR ALL Subtask 71-71-49-410-050-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.