Removal of the Anti-ice Duct No. 5

TASK 30-21-49-000-014-B
Removal of the Anti-ice Duct No. 5

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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	COVER - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-49-000-806-A	Removal of the Anti-Ice Duct Insulation
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Anti-ice Ducts

3. Job Set-up
Subtask 30-21-49-941-074-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 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) to tell persons not to energize the FADEC 1(2).

Subtask 30-21-49-010-077-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (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 30-21-49-020-081-A ** ON A/C NOT FOR ALL

A. Removal of the insulation around the coupling (9) and the duct (11) (Ref. AMM TASK 30-21-49-000-806).

Subtask 30-21-49-020-063-A ** ON A/C NOT FOR ALL

B. Removal of the Anti-ice Duct No. 5
(1) Remove the couplings (8) and (9).
(2) Remove the duct (11) and discard the seals (10) and (12).
(3) Put the applicable COVER - BLANKING on all the openings.

[Rev.10 from 2021] 2026.04.01 08:19:02 UTC