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

TASK 71-61-15-400-801-A
Installation 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	Torque wrench: range to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

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 30-21-49-400-807-A	Installation of 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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 71-61-14-000-801-A	Removal of the Anti-ice Access Panel
TASK 71-61-14-400-801-A	Installation of the Anti-Ice Access Panel
Inlet Cowl Engine Anti-Ice (EAI) Duct

3. Job Set-up
Subtask 71-61-15-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 71-61-15-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(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 71-61-15-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Inlet Cowl EAI Nozzle Duct
(1) Removal of the protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Install the EAI nozzle duct (10).
(a) Attach the EAI nozzle duct (10) and the shim (13) to the forward bulkhead with the eight bolts (11) and the eight washers (12).
1 Do not torque the bolts (11) at this time.
(b) Loosely install the anti-ice access panel (9) on the aft bulkhead (Ref. AMM TASK 71-61-14-400-801).
1 Put the EAI nozzle duct (10) through the anti-ice access panel (9).
a Do not torque the anti-ice access panel (9) attaching bolts at this time.
(c) Make sure that the distance between the aft surface of the anti-ice access panel (9) and the aft edge of the EAI nozzle duct (10) outer sleeve is between 0.773 in. (19.63 mm) and 0.873 in. (22.17 mm).
1 Add or remove the shims (13) as necessary to get the correct dimension.
(d) TORQUE the bolts (11) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

.
(e) Remove the anti-ice access panel (9) and correctly install it (Ref. AMM TASK 71-61-14-000-801) and (Ref. AMM TASK 71-61-14-400-801).
(f) Put the seal (5) on the EAI nozzle duct (10).
(g) Install the outer EAI housing (4) on the anti-ice access panel (9) with the four bolts (7) and the four washers (6).
(h) TORQUE the bolts (7) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

.
(i) Put the seal (8) on the EAI nozzle duct (10) and the outer EAI housing (4).
(j) Install the inner EAI housing (3) on the outer EAI housing (4) with the four bolts (1) and the four washers (2).
(k) TORQUE the bolts (1) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

NOTE: A maximum distance of 0.010 in. (0.254 mm) is permitted between the inner EAI housing (3) and the outer EAI housing (4) at the fastener locations.

(3) Connect the forward Nacelle Anti-Ice (NAI) duct to the EAI nozzle duct (10) (Ref. AMM TASK 30-21-49-400-807).
(a) Install the seal and the V-band coupling that attach the NAI duct to the inner EAI housing (3).
(b) Install the insulation covers.

5. Close-up
Subtask 71-61-15-410-050-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 cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).

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