DOC AIRBUS | AMM A320FRig the Anti-ice Ducts
TASK 30-21-49-820-001-A
Rig the Anti-ice Ducts
1. Reason for the Job
Self explanatory
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 30-21-49-941-077-A ** ON A/C NOT FOR ALL
Subtask 30-21-49-820-053-M ** ON A/C NOT FOR ALL
Subtask 30-21-49-410-089-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:29:57 UTC
Rig the Anti-ice Ducts
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )  | |
| No specific | Torque wrench: range to between 110 and 90 lbf.in (1.24 and 1.02 m.daN ) | |
| 98D54503005000 | 1 | IAE - STOP PLATE |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 30-21-49-000-806-A | Removal of the Anti-Ice Duct Insulation |
| TASK 30-21-49-400-806-A | Installation of the Anti-Ice Duct Insulation |
| TASK 30-21-49-790-010-A | Leak Test of the Inlet Cowl Anti-Ice Supply Ducts with the Engine in Operation |
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 71-00-00-710-017-B | Ground Test Requirements after Power Plant Module/Component Repair or Replacement Procedures |
| 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 |
NAI DuctsSubtask 30-21-49-941-077-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 30-21-49-010-102-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) in position below the engine.
Subtask 30-21-49-040-073-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) in position below the engine.
C. Deactivate the Thrust Reverser
Subtask 30-21-49-010-103-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 30-21-49-020-088-A ** ON A/C NOT FOR ALL Subtask 30-21-49-210-062-A ** ON A/C NOT FOR ALL (1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR
F. Inspection of the Couplings
4. ProcedureSubtask 30-21-49-820-053-M ** ON A/C NOT FOR ALL
A. Adjustment of the Ducts
(1) Make sure that the nut of the couplings (1), (2) and (3) are loose but sufficiently tight to hold the anti-ice duct in position.
(2) Put the gage P/N 98D54503005 206 of the 98D54503005000 IAE - STOP PLATE between the pylon stop plate and the Nacelle Anti-Icing (NAI) pylon duct in the fire bulkhead area (see Detail C).
(3) Do a visual check of the NAI duct No. 3 and NAI duct No. 4 and make sure that they are correctly aligned with the coupling (4). If they are not correctly aligned
(a) Loosen the nut of the coupling (4).
(b) Align the NAI duct No. 3 and NAI duct No. 4.
(c) TORQUE the coupling nut (4) to between 55 and 45 lbf.in (0.62 and 0.51 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
PRE SBE 80-0022
(4) Remove the nuts (10), bolts (11), washers (9) and bushes (8) from the bearing link assemblies (5), (6) and (7) (see Details A and E) and loosen the locknuts of the links (5), (6) and (7) (see Sections C-C and D-D).
(5) Adjust the NAI ducts No. 3 and 4 to get the correct clearances.
(a) Turn the head of the bearing link assemblies (5), (6) and (7) to set their length to make sure that:
(7) Do a check of the bearing link assemblies (5), (6) and (7).
(a) Use the safety holes to make sure that there is sufficient number of connecting rod threads engaged in the rod end bearings.
END OF PRE SBE 80-0022
POST SBE 80-0022
(8) Remove the nut (10), bolt (11), washer (9) and bush (8) from the bearing link assembly (7) (see Details A and E) and loosen the locknuts of the links (5), (6) and (7).
(9) Adjust the NAI ducts No. 3 and 4 to get the correct clearances:
(a) Turn the head of the bearing link assembly (7) to set its length and turn the central adjustment nut of the turnbuckle link assemblies (5) and (6) to make sure that:
(11) Do a check of the turnbuckle links (5) and (6) and the bearing link assembly (7).
(a) Use the safety holes to make sure that there is sufficient number of connecting rod threads engaged in the rod end bearings.
END OF POST SBE 80-0022
(12) Tighten the three nuts of the couplings (1), (2) and (3) in the sequence that follows:
(Ref. AMM TASK 70-23-11-911-013).
(14) Remove the gage P/N 98D54503005 206 between the pylon stop plate and the NAI pylon duct at the fire bulkhead area (see Detail C).
(15) Do a visual inspection and make sure that the segments and the NAI pylon duct do not touch in the fire bulkhead area. If they do, do Steps (2) thru (14) again.
Subtask 30-21-49-820-060-A ** ON A/C NOT FOR ALL (1) Make sure that the nut of the couplings (1), (2) and (3) are loose but sufficiently tight to hold the anti-ice duct in position.
(2) Put the gage P/N 98D54503005 206 of the 98D54503005000 IAE - STOP PLATE between the pylon stop plate and the Nacelle Anti-Icing (NAI) pylon duct in the fire bulkhead area (see Detail C).
(3) Do a visual check of the NAI duct No. 3 and NAI duct No. 4 and make sure that they are correctly aligned with the coupling (4). If they are not correctly aligned
(a) Loosen the nut of the coupling (4).
(b) Align the NAI duct No. 3 and NAI duct No. 4.
(c) TORQUE the coupling nut (4) to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )
(Ref. AMM TASK 70-23-11-911-013). PRE SBE 80-0022
(4) Remove the nuts (10), bolts (11), washers (9) and bushes (8) from the bearing link assemblies (5), (6) and (7) (see Details A and E) and loosen the locknuts of the links (5), (6) and (7) (see Sections C-C and D-D).
(5) Adjust the NAI ducts No. 3 and 4 to get the correct clearances.
(a) Turn the head of the bearing link assemblies (5), (6) and (7) to set their length to make sure that:
- The segments are correctly installed in their housings and the NAI pylon duct stays aligned to the center in the fire bulkhead area (see Detail C).
- The clearance between the coupling (3) of the NAI duct No. 3 and the engine frame is 26.00 +2 mm or -2 mm (1.02 +0.08 in. or -0.08 in.) (see Section A-A).
- The clearance between the NAI duct No. 3 and the upper link of the starter duct is not less than 6.00 mm (0.24 in.) (see Detail D).
- The clearance between the NAI duct No. 4 and the engine ring insulation is not less than 10.00 mm (0.39 in.) (see Section B-B).
NOTE: Do not lock the bearing link assemblies at this time.
(6) Install the bolts (11), bushes (8), washers (9) and nuts (10) on the bearing link assemblies (5), (6) and (7) and tight the nuts (10) with your hand only. (7) Do a check of the bearing link assemblies (5), (6) and (7).
(a) Use the safety holes to make sure that there is sufficient number of connecting rod threads engaged in the rod end bearings.
END OF PRE SBE 80-0022
POST SBE 80-0022
(8) Remove the nut (10), bolt (11), washer (9) and bush (8) from the bearing link assembly (7) (see Details A and E) and loosen the locknuts of the links (5), (6) and (7).
(9) Adjust the NAI ducts No. 3 and 4 to get the correct clearances:
(a) Turn the head of the bearing link assembly (7) to set its length and turn the central adjustment nut of the turnbuckle link assemblies (5) and (6) to make sure that:
- The segments are correctly installed in their housings and that the NAI pylon duct stays aligned to the center in the fire bulkhead area (see Detail C).
- The clearance between the coupling (3) of the NAI duct No. 3 and the engine frame is 26.00 +2 mm or -2 mm (1.02 +0.08 in. or -0.08 in.) (see Section A-A).
- The clearance between the NAI duct No. 3 and the upper link of the starter duct is not less than 6.00 mm (0.24 in.) (see Detail D).
- The clearance between the NAI duct No. 4 and the engine ring insulation is not less than 10.00 mm (0.39 in.) (see Section B-B).
NOTE: Do not lock the bearing link assembly and turnbuckle links at this time.
(10) Install the bolt (11), bush (8), washer (9) and nut (10) on the bearing link assembly (7) and tight the nut (10) with your hand only. (11) Do a check of the turnbuckle links (5) and (6) and the bearing link assembly (7).
(a) Use the safety holes to make sure that there is sufficient number of connecting rod threads engaged in the rod end bearings.
END OF POST SBE 80-0022
(12) Tighten the three nuts of the couplings (1), (2) and (3) in the sequence that follows:
- The coupling (1)
- The coupling (2)
- The coupling (3).
(Ref. AMM TASK 70-23-11-911-013). (14) Remove the gage P/N 98D54503005 206 between the pylon stop plate and the NAI pylon duct at the fire bulkhead area (see Detail C).
(15) Do a visual inspection and make sure that the segments and the NAI pylon duct do not touch in the fire bulkhead area. If they do, do Steps (2) thru (14) again.
B. Movement of the Duct N°4
PRE SBE 80-0022
(1) Move the duct N°4 with your hand at location 01 (see Detail A) along its axis.
(a) If you hear clicks in the fire bulkhead area:
1 Remove the nut (10), bolt (11), washer (9) and bush (8) from the bearing link assembly (6).
2 Turn the head of the bearing link assembly (6) a 180-degrees turn to decrease its length.
3 Install the nut (10), bolt (11), washer (9) and bush (8) to the bearing link assembly (6) and tight the nut (10) with your hand only.
4 Do Steps (1) (a) 1_ thru (1) (a) 3_ again until you hear no more clicks.
a If the clicks continue, remove or decrease them to their maximum and make sure that all the clearances agree with the values given in the adjustment of the ducts of this procedure.
(b) If you hear no clicks from the fire bulkhead area, then the NAI duct is correctly installed.
END OF PRE SBE 80-0022
POST SBE 80-0022
(2) Move the duct N°4 at location 01 with your hand (see Detail A) along its axis.
(a) If you hear clicks from the fire bulkhead area:
1 Turn the central adjustment nut of the turnbuckle link assembly (6) a quarter turn to decrease its length.
2 Do Step (2) (a) 1_ again until you hear no more clicks.
a If the clicks continue, remove or decrease them to their maximum and make sure that all the clearances agree with the values given in the adjustment of the ducts of this procedure.
(b) If you hear no click from the fire bulkhead area, then the NAI duct is correctly installed.
END OF POST SBE 80-0022
Subtask 30-21-49-220-051-A ** ON A/C NOT FOR ALL PRE SBE 80-0022
(1) Move the duct N°4 with your hand at location 01 (see Detail A) along its axis.
(a) If you hear clicks in the fire bulkhead area:
1 Remove the nut (10), bolt (11), washer (9) and bush (8) from the bearing link assembly (6).
2 Turn the head of the bearing link assembly (6) a 180-degrees turn to decrease its length.
3 Install the nut (10), bolt (11), washer (9) and bush (8) to the bearing link assembly (6) and tight the nut (10) with your hand only.
4 Do Steps (1) (a) 1_ thru (1) (a) 3_ again until you hear no more clicks.
a If the clicks continue, remove or decrease them to their maximum and make sure that all the clearances agree with the values given in the adjustment of the ducts of this procedure.
(b) If you hear no clicks from the fire bulkhead area, then the NAI duct is correctly installed.
END OF PRE SBE 80-0022
POST SBE 80-0022
(2) Move the duct N°4 at location 01 with your hand (see Detail A) along its axis.
(a) If you hear clicks from the fire bulkhead area:
1 Turn the central adjustment nut of the turnbuckle link assembly (6) a quarter turn to decrease its length.
2 Do Step (2) (a) 1_ again until you hear no more clicks.
a If the clicks continue, remove or decrease them to their maximum and make sure that all the clearances agree with the values given in the adjustment of the ducts of this procedure.
(b) If you hear no click from the fire bulkhead area, then the NAI duct is correctly installed.
END OF POST SBE 80-0022
C. Do a check of the clearances and of the bearing link and turnbuckle link assemblies.
(1) Do a check of the clearances around the ducts:
(a) If the clearances are not correct, do again Steps 4.A and 4.B.
Subtask 30-21-49-420-070-A ** ON A/C NOT FOR ALL (1) Do a check of the clearances around the ducts:
(a) If the clearances are not correct, do again Steps 4.A and 4.B.
D. Safety the Bearing Link Assemblies
PRE SBE 80-0022
(1) Safety the bearing link assemblies (5), (6) and (7).
(a) TORQUE the three nuts (10) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(b) Tighten with your hands and lock the locknut of the bearing link assemblies (5), (6) and (7).
END OF PRE SBE 80-0022
Subtask 30-21-49-420-093-A ** ON A/C NOT FOR ALL PRE SBE 80-0022
(1) Safety the bearing link assemblies (5), (6) and (7).
(a) TORQUE the three nuts (10) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (b) Tighten with your hands and lock the locknut of the bearing link assemblies (5), (6) and (7).
END OF PRE SBE 80-0022
E. Safety the Turnbuckle Link Assemblies (5) and (6) and the Bearing Link Assembly (7)
POST SBE 80-0022
(1) TORQUE the nut (10) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN ) (Ref. AMM TASK 70-23-11-911-013) of the bearing link assembly (7).
(2) Tighten with your hand and lock the locknut of the turnbuckle link assemblies (5) and (6), and the locknut of bearing link assembly (7),
(3) Safety the locknut of the turnbuckle link assemblies (5) and (6) with the tabs washers.
END OF POST SBE 80-0022
Subtask 30-21-49-710-064-A ** ON A/C NOT FOR ALL Subtask 30-21-49-790-060-A ** ON A/C NOT FOR ALL Subtask 30-21-49-420-071-A ** ON A/C NOT FOR ALL POST SBE 80-0022
(1) TORQUE the nut (10) to between 110 and 90 lbf.in (1.24 and 1.02 m.daN )
(Ref. AMM TASK 70-23-11-911-013) of the bearing link assembly (7). (2) Tighten with your hand and lock the locknut of the turnbuckle link assemblies (5) and (6), and the locknut of bearing link assembly (7),
(3) Safety the locknut of the turnbuckle link assemblies (5) and (6) with the tabs washers.
END OF POST SBE 80-0022
H. Install Insulation Around the Coupling
(1) If Step 4.F. is satisfactory
(a) Install the anti-ice duct insulation around the coupling (4) (Ref. AMM TASK 30-21-49-400-806).
(b) Make sure that all lockwires are laid flat on the insulations.
5. Close-up(1) If Step 4.F. is satisfactory
(a) Install the anti-ice duct insulation around the coupling (4) (Ref. AMM TASK 30-21-49-400-806).
(b) Make sure that all lockwires are laid flat on the insulations.
Subtask 30-21-49-410-089-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 30-21-49-440-063-A ** ON A/C NOT FOR ALL Subtask 30-21-49-410-090-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