Installation of the Secondary Anti-ice Ducts

TASK 30-21-49-400-040-A
Installation of the Secondary 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 1M (3 FT)-ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 85 and 70 lbf.in (0.96 and 0.79 m.daN )
No specific	Torque wrench: range to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 462AR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
75	SEAL	AIPC 30-21-49-01-070

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 30-21-49-790-802-A	Leak Test of the Nacelle Anti-Ice Supply-Ducts and Hoses with the Engine in Operation
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
Anti-ice Ducts
Anti-ice Ducts
Duct Coupling Installation

3. Job Set-up
Subtask 30-21-49-860-062-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 the WARNING NOTICE(S) is in position to tell persons not to start the engine.
(3) On the ENG section of the maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize the FADEC system 1(2).
(4) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.

Subtask 30-21-49-010-099-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 right thrust reverser door is open (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 30-21-49-040-067-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 30-21-49-865-065-A ** ON A/C NOT FOR ALL

D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

4. Procedure
Subtask 30-21-49-420-064-A ** ON A/C NOT FOR ALL

A. Installation of the Anti-ice Ducts
(1) Remove the blanking plugs from the ducts, the hose, and the tube assemblies.
(2) Connect the tube (50) to the lower high-pressure manifold duct and the union.

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

(3) TORQUE the nuts on the couplings to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

NOTE: Use a second wrench to hold the union on the pneumatic duct and the union on the fireshield when you torque the tube (50) coupling nuts.

(4) Connect the tube (40) to the union.
(5) Attach the tube (40) to the engine brackets and the tube fairlead with the clamps (45), the bolts (20), the washers (25), and the nuts (30).
(6) TORQUE the nut on the coupling to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

NOTE: Use a second wrench to hold the union on the fireshield when you torque the tube (40) coupling nut.

(7) Connect the hose (35) to the tube (40).

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

(8) TORQUE the nut on the coupling to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

NOTE: Use a second wrench to hold the fitting on the tube when you torque the hose (35) coupling nut.

(9) Attach the tube (15) to the lugs on the forward anti-ice duct (80) with the bolts (20), the washers (25), and the nuts (30).
(10) Attach the tube (15) to the support bracket of the anti-ice duct with the nut (120) and the washer (125).
(11) TORQUE the nut (120) and the hose (35) coupling nut to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

NOTE: Use a second wrench to hold the fitting on the tube when you torque the hose (35) coupling nut.

(12) Connect the forward anti-ice duct (80).

CAUTION: MAKE SURE THE LATCH AND HINGE OF THE COUPLING DO NOT TOUCH ADJACENT COMPONENTS OR COWL DOORS (WHEN CLOSED). DO NOT USE FORCE TO ENGAGE THE SADDLE WASHER IN THE RECESS OF THE OTHER COUPLING HALF. DAMAGE TO COMPONENTS CAN OCCUR.

CAUTION: TWO TYPES OF COUPLINGS ARE USED ON THE BLEED AIR DUCTS. IT IS POSSIBLE TO INSTALL ONE OF THESE TYPES INCORRECTLY. WHEN YOU INSTALL THIS TYPE OF COUPLING, MAKE SURE THE SLIDE PART OF THE COUPLING (WITH THE SADDLE WASHER) ENGAGES THE RECESSES OF THE OTHER HALF OF THE COUPLING. IF THE COUPLING IS INSTALLED INCORRECTLY, IT CAN DISENGAGE AND CAUSE LARGE AIR LEAKS AND POSSIBLE DAMAGE.

(a) Use the new AIPC 30-21-49-01-070 SEAL (75) and the couplings (70) to connect the forward anti-ice duct (80), (with the tube (15) attached to it) to:
1 the rear anti-ice duct (85),
2 the anti-ice valve (5).
(13) Install the latch and hinge of the coupling.

CAUTION: MAKE SURE THE LATCH AND HINGE OF THE COUPLING DO NOT TOUCH ADJACENT COMPONENTS OR COWL DOORS (WHEN CLOSED). DAMAGE TO COMPONENTS CAN OCCUR.

(a) If the coupling (70) is of the type shown on

Duct Coupling Installation ** ON A/C NOT FOR ALL

try to move the slide. If the slide moves, open the coupling. Close the coupling so that the saddle washer is in the recess of the other half of the coupling. If the slide does not move, replace the coupling (70).
(b) TORQUE the nut on the coupling (70) to between 85 and 70 lbf.in (0.96 and 0.79 m.daN )

. Tap hit the coupling perimeter with a hammer not made of metal. Torque the nut again to the same torque value and tap hit the coupling perimeter again. Do this procedure again, then torque the nut to the same value.
(14) Connect the hose (10) to the tube (15) and to the union on the valve (5).
(15) TORQUE the hose (10) coupling nuts to between 150 and 135 lbf.in (1.70 and 1.53 m.daN )

NOTE: Use a second wrench to hold the union on the valve and the fitting on the tube when you torque the hose (10) coupling nuts.

Subtask 30-21-49-790-068-A ** ON A/C NOT FOR ALL

B. Leak Test
(1) Do the leak test of the secondary anti-ice ducts with the engine in operation (Ref. AMM TASK 30-21-49-790-802).

5. Close-up
Subtask 30-21-49-410-079-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 right thrust reverser door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 30-21-49-440-059-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 30-21-49-410-085-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)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 30-21-49-865-069-A ** ON A/C NOT FOR ALL

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-49-862-059-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 00:29:19 UTC