Installation of the Anti-ice Duct No. 3

TASK 30-21-49-400-012-B
Installation of the Anti-ice Duct No. 3

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)

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
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
4	SEAL	AIPC 30-21-49-80-130

E. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-49-400-806-A	Installation of the Anti-Ice Duct Insulation
TASK 30-21-49-820-001-A	Rig the Anti-ice Ducts
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)
Anti-ice Ducts

3. Job Set-up
Subtask 30-21-49-860-056-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 30-21-49-010-086-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 30-21-49-110-061-A ** ON A/C NOT FOR ALL

A. Clean the Ends of the Duct

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

(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 30-21-49-420-060-A ** ON A/C NOT FOR ALL

B. Installation of the Anti-ice Duct No. 3

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

(1) Put the duct (1) and a new AIPC 30-21-49-80-130 SEAL (4) (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 (2) and (3).
(a) Make sure that the seal (4) is installed correctly between duct No. 3 (1) and duct No. 4 (5).
(b) Make sure that the t-bolt (25) on the coupling (2) is installed at a 20 degree angle from the top of the duct so that it does not touch the fan cowl door hinge when closed.
(3) Tighten the couplings sufficiently to hold the duct in position.

PRE SBE 80-0022

(4) Connect the bearing link assembly to the duct:
(a) Attach the bearing link assembly to the duct (1) with the bolt (14), the bush (15), the washer (16) and the nut (17).
(b) Tighten the nut sufficiently to hold the bearing link assembly in position.

END OF PRE SBE 80-0022

POST SBE 80-0022

(5) Connect the turnbuckle link assembly to the duct:
(a) Attach the turnbuckle link assembly to the duct (1) with the bolt (14), the bush (15), the washer (16) and the nut (17).
(b) Tighten the nut sufficiently to hold the turnbuckle link assembly in position.

END OF POST SBE 80-0022

Subtask 30-21-49-820-050-A ** ON A/C NOT FOR ALL

C. Rig the anti-ice ducts (Ref. AMM TASK 30-21-49-820-001).

Subtask 30-21-49-420-090-A ** ON A/C NOT FOR ALL

D. Install the Insulations around Anti-ice Duct No.3 (Ref. AMM TASK 30-21-49-400-806).

5. Close-up
Subtask 30-21-49-410-072-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 fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:56:31 UTC