W DOC AIRBUS | AMM A320F

Installation of the Forward Anti-ice Duct

TASK 30-21-49-400-044-A
Installation of the Forward Anti-ice Duct

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 1M (3 FT)-ADJUSTABLE
No specific
1
HAMMER - FIBER
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) T
No specific
Torque wrench: range to between 85 and 70 lbf.in (0.96 and 0.79 m.daN ) T
No specific
Torque wrench: range to between 140 and 100 lbf.in (1.58 and 1.13 m.daN ) T
No specific
Torque wrench: range to between 120 and 110 lbf.in (1.36 and 1.24 m.daN ) T
No specific
Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T
No specific
Torque wrench: range to between 160 and 150 lbf.in (1.81 and 1.70 m.daN ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
55
E-SEAL
AIPC 30-21-49-01-130
55
E-SEAL
AIPC 30-21-51-01-020
 D. Referenced Information
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 30-21-49-790-803-A
Leak Test of the Nacelle Anti-Ice Supply Ducts, Muscle Pressure Tubes and Hoses With the Engine in Operation
TASK 71-13-00-010-040-B
Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B
Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B
Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B
Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B
Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B
Closing of the Thrust Reverser Doors
F Anti-ice Ducts
3. Job Set-up
Subtask 30-21-49-860-064-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
   (2) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
   (3) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
   (4) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.
Subtask 30-21-49-010-059-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
     (a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
     (b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 30-21-49-040-054-A ** ON A/C NOT FOR ALL
C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).
Subtask 30-21-49-865-056-A ** ON A/C NOT FOR ALL
D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
122VUANTI ICE/ENG/21DN2W10
122VUANTI ICE/ENG/11DN1X10
4. Procedure
Subtask 30-21-49-210-051-A ** ON A/C NOT FOR ALL
A. Examine the seal (55) to make sure that it is serviceable.
Subtask 30-21-49-420-050-A ** ON A/C NOT FOR ALL
B. Installation of the Forward Anti-ice Duct
   (1) Remove the blanking plugs from the anti-ice ducts, and the anti-ice valve.
   (2) Remove the protective covers from the hoses and the two ends of the forward muscle pressure tube.
NOTE: Do not torque the bolts that attach the anti-ice duct or the couplings that connect the duct until the duct is installed in the correct position.
   (3) Connect the forward anti-ice duct (65) to the anti-ice valve (4000DN), use the coupling (60) and a AIPC 30-21-49-01-130 E-SEAL (55) or AIPC 30-21-51-01-020 E-SEAL (55). Tighten the coupling sufficiently to hold the anti-ice duct in position.
   (4) Attach the support links (80) to the forward anti-ice duct (65) support brackets. Use the bolts (70), washers (75), and nuts (85). Do not torque the nuts at this time.
NOTE: Nominal length of the support links is 2.62 in. (66.6 mm).
   (5) Make sure that the index marks on the forward duct (65) and the anti-ice valve are aligned. Adjust the support links (80), as necessary, so they do not put a load on the anti-ice ducts. Make sure the anti-ice ducts are correctly aligned before the coupling (60) nuts are torqued.
   (6) TORQUE the support link nuts (85) to between 140 and 100 lbf.in (1.58 and 1.13 m.daN ) T.
   (7) TORQUE the coupling nut (60) as follows:
     (a) TORQUE the coupling nut to between 85 and 70 lbf.in (0.96 and 0.79 m.daN ) T.
     (b) Lightly hit the perimeter of the coupling in several places. Use a HAMMER - FIBER , not a metal hammer.
     (c) Do steps (a) and (b) above two more times. Then do step (1) again.
   (8) Install the forward muscle pressure tube (20).
     (a) Loosely install the tube (20) on the forward anti-ice duct (65) support bracket with the bulkhead nut (10) and the washer (15).
     (b) TORQUE the bulkhead nut (10) on the tube (65) to between 120 and 110 lbf.in (1.36 and 1.24 m.daN ) T.
NOTE: Hold the muscle tube (20) fitting with a second wrench when you torque the bulkhead nut (10).
     (c) Put the two clamps (45) on the tube (20). Attach the clamps to the anti-ice duct (65) tangs with the bolts (25), the washers (30), and the nuts (35).
     (d) TORQUE the nuts (35) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) T.
     (e) Connect the two hoses (5) and (40) to the tube (20).
     (f) TORQUE the hose (5) coupling nuts to between 150 and 135 lbf.in (1.70 and 1.53 m.daN ) T.
     (g) TORQUE the hose (40) coupling nuts to between 160 and 150 lbf.in (1.81 and 1.70 m.daN ) T.
NOTE: Use a second wrench to hold the fittings on the forward muscle pressure tube when you torque the hose coupling nuts.
Subtask 30-21-49-790-070-A ** ON A/C NOT FOR ALL
C. Leak Test
   (1) Do the leak test of the forward anti-ice duct with the engine in operation (Ref. AMM TASK 30-21-49-790-803).
5. Close-up
Subtask 30-21-49-410-054-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 cowl doors (Ref. AMM TASK 78-36-00-410-040):
     (a) FOR [1000EM1] (ENGINE-1)
452AR 451AL
     (b) FOR [1000EM2] (ENGINE-2)
462AR 461AL
Subtask 30-21-49-440-052-A ** ON A/C NOT FOR ALL
B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).
Subtask 30-21-49-410-058-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
     (a) FOR [1000EM1] (ENGINE-1)
438AR 437AL
     (b) FOR [1000EM2] (ENGINE-2)
448AR 447AL
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
Subtask 30-21-49-865-057-A ** ON A/C NOT FOR ALL
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
122VUANTI ICE/ENG/21DN2W10
122VUANTI ICE/ENG/11DN1X10
Subtask 30-21-49-862-056-A ** ON A/C NOT FOR ALL
E. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
[Rev.10 from 2021] 2026.04.01 00:29:26 UTC
"Aviabrain" 2025