DOC AIRBUS | AMM A320FInspection of the Scavenge Oil Tubes [IAE]
TASK 79-22-49-200-010-A
Inspection of the Scavenge Oil Tubes
1. Reason for the Job
This task gives the procedure for the inspection of the scavenge oil 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 79-22-49-941-050-A ** ON A/C NOT FOR ALL
Subtask 79-22-49-210-050-A ** ON A/C NOT FOR ALL
Subtask 79-22-49-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:39:55 UTC
Inspection of the Scavenge Oil Tubes
1. Reason for the Job
This task gives the procedure for the inspection of the scavenge oil tubes.
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 | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| 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 |
Subtask 79-22-49-941-050-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 79-22-49-010-050-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):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 79-22-49-040-050-A ** ON A/C NOT FOR ALL Subtask 79-22-49-010-051-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
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 79-22-49-210-050-A ** ON A/C NOT FOR ALL
A. Visually examine the scavenge oil tubes for dents, nicks, fretting and scoring.
(1) Dents:
(a) Smooth dents of a large area relative to depth:
1 That do not decrease the diameter of the tube by more than 10 percent at one point, accept it.
2 That decrease the diameter of the tube by more than 10 percent at one point, reject it.
3 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, of the tube end fitting, accept it.
4 When they are within one diameter or 0.5 in. (12.7 mm), whichever is the greater, of the tube end fitting, reject it.
(b) Smooth dents of a small area up to 0.125 in.2 (80.65 mm2):
1 With a smooth bottom and their depth is 0.015 in. (0.38 mm) or less on the external surface of a bend, accept it.
2 When their depth is more than 0.015 in. (0.38 mm) on the external surface of a bend, reject it.
3 With a smooth bottom and their depth is 0.025 in. (0.63 mm) or less on other sections of the tube, accept it.
4 When their depth is more than 0.025 in. (0.63 mm), reject it.
5 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, accept it.
6 When they are within one diameter as 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, reject it.
(c) Which are not smooth, reject it.
(2) Nicks:
(a) With a smooth bottom and 0.004 in. (0.1 mm) or less in depth and all burrs have been removed, accept it.
(b) With a bottom that is not smooth or is more than 0.004 in. (0.1 mm) in depth, reject it.
(c) On the external surface of a bend, reject it.
(3) Fretting:
(a) Up to a maximum depth of 0.007 in. (0.18 mm) on the external surface of a bend, accept it.
(b) More than 0.007 in. (0.18 mm) in depth on the external surface of a bend, reject it.
(c) Up to a maximum depth of 0.01 in. (0.25 mm) on other sections of the tube, accept it.
(d) More than 0.01 in. (0.25 mm) in depth, reject it.
(4) Scoring:
(a) With a maximum depth of 0.004 in. (0.1 mm) can be blended out.
(b) More than 0.004 in. (0.1 mm) in depth, reject it.
5. Close-up(1) Dents:
(a) Smooth dents of a large area relative to depth:
1 That do not decrease the diameter of the tube by more than 10 percent at one point, accept it.
2 That decrease the diameter of the tube by more than 10 percent at one point, reject it.
3 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, of the tube end fitting, accept it.
4 When they are within one diameter or 0.5 in. (12.7 mm), whichever is the greater, of the tube end fitting, reject it.
(b) Smooth dents of a small area up to 0.125 in.2 (80.65 mm2):
1 With a smooth bottom and their depth is 0.015 in. (0.38 mm) or less on the external surface of a bend, accept it.
2 When their depth is more than 0.015 in. (0.38 mm) on the external surface of a bend, reject it.
3 With a smooth bottom and their depth is 0.025 in. (0.63 mm) or less on other sections of the tube, accept it.
4 When their depth is more than 0.025 in. (0.63 mm), reject it.
5 When they are not within one diameter or 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, accept it.
6 When they are within one diameter as 0.5 in. (12.7 mm), whichever is the greater, from the tube end fitting, reject it.
(c) Which are not smooth, reject it.
(2) Nicks:
(a) With a smooth bottom and 0.004 in. (0.1 mm) or less in depth and all burrs have been removed, accept it.
(b) With a bottom that is not smooth or is more than 0.004 in. (0.1 mm) in depth, reject it.
(c) On the external surface of a bend, reject it.
(3) Fretting:
(a) Up to a maximum depth of 0.007 in. (0.18 mm) on the external surface of a bend, accept it.
(b) More than 0.007 in. (0.18 mm) in depth on the external surface of a bend, reject it.
(c) Up to a maximum depth of 0.01 in. (0.25 mm) on other sections of the tube, accept it.
(d) More than 0.01 in. (0.25 mm) in depth, reject it.
(4) Scoring:
(a) With a maximum depth of 0.004 in. (0.1 mm) can be blended out.
(b) More than 0.004 in. (0.1 mm) in depth, reject it.
Subtask 79-22-49-410-050-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):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 79-22-49-440-050-A ** ON A/C NOT FOR ALL Subtask 79-22-49-410-051-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):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.