Installation of the Anti-ice Duct No. 2

TASK 30-21-49-400-011-B
Installation of the Anti-ice Duct No. 2

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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 )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(Material No.14SBA1)	Textile-Lint free Cotton -

C. 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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
23	SEAL	AIPC 30-21-49-80-080

E. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-49-790-010-A	Leak Test of the Inlet Cowl Anti-Ice Supply Ducts with the Engine in Operation
TASK 30-21-49-820-001-A	Rig the Anti-ice Ducts
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-13-911-010-A	Procedures for the Installation of Preformed Packings
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
Anti-ice Ducts

3. Job Set-up
Subtask 30-21-49-860-054-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(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 2M (6 FT) is in position.

Subtask 30-21-49-010-084-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser halves are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 30-21-49-040-065-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 30-21-49-110-060-A ** ON A/C NOT FOR ALL

A. Clean the Ends of the Duct
(1) Remove the applicable covers/caps/plugs from the openings.
(2) Use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-076Methyl Ethyl Ketone, Technical grade to clean the ends of the duct.

Subtask 30-21-49-420-059-A ** ON A/C NOT FOR ALL

B. Installation of the Anti-ice Duct No. 2

Anti-ice Ducts ** ON A/C NOT FOR ALL

(1) Put the duct (19) with a new AIPC 30-21-49-80-080 SEAL (23) (Ref. AMM TASK 70-23-13-911-010) on the engine in the correct position for installation.

CAUTION: MAKE SURE THE COUPLINGS DO NOT TOUCH ADJACENT COMPONENTS OR FAN COWL DOORS (WHEN CLOSED). DAMAGE TO COMPONENTS CAN OCCUR.

(2) Connect the duct with the couplings (18) and (20). Make sure that the seal is installed correctly.
(a) Make sure that the couplings (18) and (20) are in the correct position so that they do not touch the adjacent components.
(3) TORQUE the coupling nuts (18) and (20) to between 55 and 45 lbf.in (0.62 and 0.51 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 30-21-49-790-066-A ** ON A/C NOT FOR ALL

C. Check of the Anti-ice Duct Installation
(1) Make sure that the segments are correctly installed in the pylon housing and the NAI pylon duct stays aligned to the center of the fire bulkhead area, (see Detail C) given in the rigging of the anti ice ducts procedure (Ref. AMM TASK 30-21-49-820-001).
(a) If the segments are not correctly installed in the pylon housing and/or the NAI pylon duct is not aligned to the center of the fire bulkhead area:

Go to Step (4).

(b) If the segments are correctly installed in the pylon housing duct and the NAI pylon duct is aligned to the center of the fire bulkhead area:

Go to Step (2).

(2) Make sure that all the clearances given in adjustment of the ducts of the rigging of the anti ice ducts procedure are correct (Ref. AMM TASK 30-21-49-820-001).
(a) If one of these clearances is not correct:

Go to Step (4).

(b) If all of these clearances are correct:

Go to Step (3).

(3) Do movement of the duct N°4 given in the rigging of the anti-ice ducts procedure (Ref. AMM TASK 30-21-49-820-001).

Do a check of the clearances given in the adjustment of the ducts of the rigging of the anti-ice ducts procedure around the ducts again:

(a) If all of these clearances are correct, go to Step (5).
(b) If one of these clearances is not correct, go to Step (4).
(4) Do the rigging of the anti-ice ducts (Ref. AMM TASK 30-21-49-820-001).
(5) Do a leak test at the couplings (18) and (20) (Ref. AMM TASK 30-21-49-790-010).

5. Close-up
Subtask 30-21-49-410-071-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 30-21-49-440-058-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 30-21-49-410-078-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 12:56:10 UTC