DOC AIRBUS | AMM A320FGeneral Check of the Anti-Ice Ducts
TASK 30-21-49-200-011-A
General Check of the Anti-Ice Ducts
This task gives the procedure for a general check of the inner and outer anti-ice ducts and their related components.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 30-21-49-861-053-A ** ON A/C NOT FOR ALL Subtask 30-21-49-941-066-A ** ON A/C NOT FOR ALL
Subtask 30-21-49-110-056-A ** ON A/C NOT FOR ALL
Subtask 30-21-49-410-067-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:30:08 UTC
General Check of the Anti-Ice Ducts
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 inner and outer anti-ice ducts and their related components.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-076) | Methyl Ethyl Ketone, Technical grade |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
| TASK 30-21-49-200-013-B | Detailed Check of the Anti-Ice Interbulkhead System with Component Removal |
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
Anti-Ice DuctsSubtask 30-21-49-861-053-A ** ON A/C NOT FOR ALL Subtask 30-21-49-941-066-A ** ON A/C NOT FOR ALL
B. 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 30-21-49-010-069-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).
C. Remove the thermal anti-ice outlet panel
(1) Remove the 23 bolts (29) from the outlet panel (28).
(2) Remove the outlet panel (28) from the outer duct (31) and the nose cowl.
4. Procedure(1) Remove the 23 bolts (29) from the outlet panel (28).
(2) Remove the outlet panel (28) from the outer duct (31) and the nose cowl.
Subtask 30-21-49-110-056-A ** ON A/C NOT FOR ALL
A. Clean Components
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist withV01-076 Methyl Ethyl Ketone, Technical grade
1 The inner duct (32).
2 The outer duct (31).
3 The outer duct insulation (27).
(b) Dry the components with a clean Textile-Lint free Cotton - (Material No.14SBA1) .
Subtask 30-21-49-210-054-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Clean the inner and outer thermal anti-ice ducts and their related components (a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with
1 The inner duct (32).
2 The outer duct (31).
3 The outer duct insulation (27).
(b) Dry the components with a clean Textile-Lint free Cotton - (Material No.14SBA1) .
B. Visually Examine the Inner and Outer Thermal Anti-Ice Ducts
(1) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, to examine the inner and outer thermal anti-ice ducts and their related components to make sure that the parts are satisfactorily attached.
(a) The outer duct insulation (27).
(b) The seal (30).
(c) The outer duct (31).
(d) The inner duct (32).
(2) If the outer duct insulation (27) or the seal (30) have become loose, reject the part. If the outer duct (31) or the inner duct (32) have become loose, do (Ref. AMM TASK 30-21-49-200-013).
(3) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the inner and outer thermal anti-ice ducts for leaks.
(a) If the color at the edges of the ducts has changed from that of the remaining duct, reject the part.
(b) If there are other signs of leaks, reject the part.
(4) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the general condition of the inner and outer thermal anti-ice ducts.
(a) Examine the inner duct and the internal surface of the outer duct for cracks. If the duct is cracked, reject it.
(b) Examine the inner duct and the internal surface of the outer duct for dents.
1 Dents with smooth contours, not less than 1.0 in. (25.4 mm) apart and not more than 0.05 in. (1.3 mm) deep: accept the part.
2 Dents other than in step above: reject the part.
(c) Examine the ducts for nicks, scores and fretting.
1 Damage with smooth contours, up to 0.003 in. (0.08 mm) in deep on a straight part of a duct: accept the part.
2 Damage other than in step above on a straight part of a duct: reject the part.
3 Damage on a bend: reject the part.
(5) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the general condition of the outer duct seal.
(a) Examine the seal for damage. If the seal is damaged, reject it.
5. Close-up(1) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION, to examine the inner and outer thermal anti-ice ducts and their related components to make sure that the parts are satisfactorily attached.
(a) The outer duct insulation (27).
(b) The seal (30).
(c) The outer duct (31).
(d) The inner duct (32).
(2) If the outer duct insulation (27) or the seal (30) have become loose, reject the part. If the outer duct (31) or the inner duct (32) have become loose, do (Ref. AMM TASK 30-21-49-200-013).
(3) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the inner and outer thermal anti-ice ducts for leaks.
(a) If the color at the edges of the ducts has changed from that of the remaining duct, reject the part.
(b) If there are other signs of leaks, reject the part.
(4) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the general condition of the inner and outer thermal anti-ice ducts.
(a) Examine the inner duct and the internal surface of the outer duct for cracks. If the duct is cracked, reject it.
(b) Examine the inner duct and the internal surface of the outer duct for dents.
1 Dents with smooth contours, not less than 1.0 in. (25.4 mm) apart and not more than 0.05 in. (1.3 mm) deep: accept the part.
2 Dents other than in step above: reject the part.
(c) Examine the ducts for nicks, scores and fretting.
1 Damage with smooth contours, up to 0.003 in. (0.08 mm) in deep on a straight part of a duct: accept the part.
2 Damage other than in step above on a straight part of a duct: reject the part.
3 Damage on a bend: reject the part.
(5) Use the LIGHT SOURCE - INSPECTION and the MIRROR - INSPECTION to examine the general condition of the outer duct seal.
(a) Examine the seal for damage. If the seal is damaged, reject it.
Subtask 30-21-49-410-067-A ** ON A/C NOT FOR ALL
A. Install the Outlet Panel
(2) Install the 23 bolts (29).
(3) TORQUE the bolts (29) to between 28.6 and 23.4 lbf.in (0.32 and 0.26 m.daN )
(Ref. AMM TASK 70-23-11-911-013).
(4) Remove the WARNING NOTICE(S).
Subtask 30-21-49-862-053-A ** ON A/C NOT FOR ALL CAUTION:
MAKE SURE THAT THE OUTER DUCT SEAL (30) IS CORRECTLY INSTALLED TO THE OUTER DUCT (31).
(1) Install the outlet panel (28) on the outer duct (31) and the air intake cowl. (2) Install the 23 bolts (29).
(3) TORQUE the bolts (29) to between 28.6 and 23.4 lbf.in (0.32 and 0.26 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (4) Remove the WARNING NOTICE(S).