Installation of the Anti-Ice Duct Insulation

TASK 30-21-49-400-806-A
Installation of the Anti-Ice Duct Insulation

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-147)	lockwire

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. Referenced Information

REFERENCE	DESIGNATION
TASK 70-40-11-911-014-A	Locking Devices General Information
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 Insulation

3. Job Set-up
Subtask 30-21-49-941-098-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five 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) in position to tell persons not to energize FADEC 1(2).

Subtask 30-21-49-010-135-A ** ON A/C NOT FOR ALL

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 30-21-49-040-083-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser

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) Do the deactivation of the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 30-21-49-010-136-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 30-21-49-420-089-A ** ON A/C NOT FOR ALL

A. Installation of the Anti-Ice Duct Insulation
(1) Install the insulation around ducts No.3 and No.4.
(a) Install insulations (4), (5), (6) and (7) around duct No.3.
(b) Install insulations (8), (9), (10), (11), (12) and (13) around duct No.4.
(c) Safety the insulation with the lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(d) Make sure that the lockwire is laid flat on the insulations.
1 Install the lockwire between the attachment lugs.
(2) Install the insulation around the gimbals.
(a) Install insulations (14), (15), (16) and (17) around the gimbals.
(b) Safety the insulation with the lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).

(c) Make sure that the lockwire is laid flat on the insulations.
1 Install the lockwire directly between the attachment lugs.
2 Wirelock the gimbal insulation to the adjacent duct insulation.
(d) Make sure that the lockwire is laid flat on the insulations.
(3) Install the insulation around the couplings.
(a) Install insulations (18), (19), (20) and (21) to the couplings.
(b) Safety the insulation with the lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).

(c) Make sure that the lockwire is laid flat on the insulations.
1 Wirelock the coupling insulation to the adjacent duct insulation.
(4) Install the insulation around the anti-ice valve and duct No.5.
(a) Put the insulation (1) in a position that prevents its movement around the anti-ice valve.
(b) Install the insulations (2) and (3) around duct No. 5.
(c) Safety the insulation with the lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).

(d) Make sure that the lockwire is laid flat on the insulations.
1 Install the lockwire between the attachment lugs.

5. Close-up
Subtask 30-21-49-410-115-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 30-21-49-440-070-A ** ON A/C NOT FOR ALL

B. Do the re-activation of the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 30-21-49-410-116-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 00:29:45 UTC