Removal of the Inlet Cowl Engine Anti-Ice (EAI) Duct [PW11]

TASK 71-61-15-000-801-A
Removal of the Inlet Cowl Engine Anti-Ice (EAI) Duct

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

ZONE: 400

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 - PROTECTION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-49-000-807-A	Removal of the Nacelle Anti-Ice (NAI) Duct
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-61-14-000-801-A	Removal of the Anti-ice Access Panel
Inlet Cowl Engine Anti-Ice (EAI) Duct

3. Job Set-up
Subtask 71-61-15-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 71-61-15-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 71-61-15-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Inlet Cowl EAI Nozzle Duct
(1) Disconnect the forward Nacelle Anti-Ice (NAI) duct from the EAI nozzle duct (10) (Ref. AMM TASK 30-21-49-000-807).
(a) Remove the insulation covers.
(b) Loosen the V-band coupling that attaches the NAI duct to the inner EAI housing (3).
(2) Remove the EAI nozzle duct (10).
(a) Remove the four bolts (1) and the four washers (2) that attach the inner EAI housing (3) to the outer EAI housing (4).
(b) Remove the inner EAI housing (3) from the outer EAI housing (4).
(c) Remove the seal (8) from the EAI nozzle duct (10) and the outer EAI housing (4).
(d) Remove the four bolts (7) and the four washers (6) that attach the outer EAI housing (4) to the anti-ice access panel (9).
(e) Remove the outer EAI housing (4) from the anti-ice access panel (9).
(f) Remove the seal (5) from the EAI nozzle duct (10) and the anti-ice access panel (9).
(g) Remove the anti-ice access panel (9) from the inlet cowl (Ref. AMM TASK 71-61-14-000-801).
(h) Remove the eight bolts (11) and the eight washers (12) that attach the EAI nozzle duct (10) and, if installed, the shim (13) to the forward bulkhead of the inlet cowl.
(i) Remove the EAI nozzle duct (10) and, if installed, the shim (13) from the inlet cowl.
(3) Installation of the protection covers

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Make sure that you install the COVER - PROTECTION as necessary to prevent damage to the engine.

[Rev.10 from 2021] 2026.04.01 12:57:34 UTC