Removal of the Air Intake Cowl [CFML]

TASK 71-61-41-000-802-A
Removal of the Air Intake Cowl

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.

WARNING: BE CAREFUL DURING THE REMOVAL/INSTALLATION OF THE AIR INTAKE COWL. IT WEIGHS 292 LB (132.4 KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: BEFORE YOU INSTALL/REMOVE THE GSE TOOL, READ THE MANUFACTURER'S INSTRUCTIONS, AND, WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT DO THIS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

ZONE: 210
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	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	1	CAP - BLANKING
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
98N7160H001-001	1	INLET COWL SLING
98N7160H002-000	1	INLET DOLLY

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 73-21-15-000-801-A	Removal of the T12 Sensor
Air Intake Cowl (PRE and POST SB LEAP-1A-72-00-0191)
Inlet Cowl Sling
Air Intake Cowl Dolly

3. Job Set-up
Subtask 71-61-41-941-054-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the 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 71-61-41-010-054-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

4. Procedure
Subtask 71-61-41-020-057-A

A. Disconnection of the Electrical Connectors
(1) Disconnect the electrical connectors (2) from the T12 sensor.
(2) In the case of the air intake cowl replacement, remove the T12 sensor to keep it with the engine (Ref. AMM TASK 73-21-15-000-801).
(3) Remove the filler plugs from the hoist points on the air intake cowl. Keep the filler plugs for the installation after you removed the air intake cowl.

Subtask 71-61-41-480-054-A

B. Installation of the Tooling

Inlet Cowl Sling

(1) Install the 98N7160H001-001 INLET COWL SLING on the air intake cowl (1), follow the user guide manual.
(2) Lift the 98N7160H001-001 INLET COWL SLING until it supports the air intake cowl (1) weight.

Subtask 71-61-41-020-061-A

C. Removal of the Blower Duct

PRE SB LEAP-1A-72-0191

(1) Loosen and remove the clamp (3) from the blower duct (4).
(2) Disengage the blower duct (4) from the air intake cowl (1).

END OF PRE SB LEAP-1A-72-0191

Subtask 71-61-41-020-063-A

D. Removal of the Blanking Cap

POST SB LEAP-1A-72-0191

(1) Loosen and remove the clamp (3) from the CAP - BLANKING (12).
(2) Remove the CAP - BLANKING (12) from the air intake cowl (1).

END OF POST SB LEAP-1A-72-0191

Subtask 71-61-41-020-062-A

E. Removal of the Anti-Ice Duct
(1) Remove the two straps (5) that attach the insulation covers (6) to the anti-ice duct (7).
(2) Remove the insulation covers (6) from the anti-ice duct (7).
(3) Discard the straps (5).
(4) Remove the coupling (8) that attach the anti-ice duct (7) to the air intake cowl (1).
(5) Remove and discard the e-seal (9).
(6) Disengage the anti-ice duct (7) from the air intake cowl (1).

Subtask 71-61-41-020-055-A

F. Disengagement of the Air Intake Cowl
(1) Remove the 36 bolts (11) and nuts (10) that attach the air intake cowl (1) to the engine flange.

CAUTION: DURING THE REMOVAL/INSTALLATION OF THE AIR INTAKE COWL, MAKE SURE THAT THE TWO SPIGOTS DO NOT HIT THE ENGINE FLANGE. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE FLANGE AND/OR THE SPIGOTS CAN OCCUR.

(2) Pull the air intake cowl (1) forward as necessary to disengage the two spigots from the engine flange and make sure that the two spigots do not hit the engine flange.

Subtask 71-61-41-480-055-A

G. Installation of the Air Intake Cowl on the Dolly

Air Intake Cowl Dolly

(1) Put the air intake cowl (1) on the 98N7160H002-000 INLET DOLLY.
(2) Attach the air intake cowl to the 98N7160H002-000 INLET DOLLY with the bolts (11) and nuts (10).

Subtask 71-61-41-080-052-A

H. Removal of the Tooling

Inlet Cowl Sling

(1) Remove the 98N7160H001-001 INLET COWL SLING from the air intake cowl (1).

Subtask 71-61-41-420-054-A

I. Installation of the Protection Covers
(1) Put COVER - PROTECTION on preformed hoses, blower duct and anti-ice duct.

[Rev.10 from 2021] 2026.04.01 12:58:21 UTC