Installation of the Air Intake Cowl [CFML]

TASK 71-61-41-400-802-A
Installation 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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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: ADJUST THE FAN COWL DOORS WHEN A NEW AIR INTAKE COWL IS INSTALLED. IF THE FAN COWL DOORS ARE NOT CORRECTLY ADJUSTED THE DOORS CAN OPEN IN FLIGHT.

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 31.00 and 28.00 lbf.ft (4.20 and 3.80 m.daN )
No specific	Torque wrench: range to between 46.2 and 41.8 lbf.in (0.52 and 0.47 m.daN )
No specific	Torque wrench: range to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )
98N7160H001-001	1	INLET COWL SLING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. 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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	STRAP	AIPC 30-21-49-05-012
9	E-SEAL	AIPC 30-21-49-05-080
11	BOLTS	AIPC 71-11-11-10-060
10	NUTS	AIPC 71-11-11-10-070

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 71-13-11-820-802-A	Adjustment of the Fan Cowl Doors Clearance
TASK 73-21-15-400-801-A	Installation of the T12 Sensor
Air Intake Cowl (PRE and POST SB LEAP-1A-72-00-0191)
Inlet Cowl Sling
Air Intake Cowl Dolly
Torque Sequence Chart

3. Job Set-up
Subtask 71-61-41-941-055-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) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch, and
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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 71-61-41-010-055-A

B. Get Access
(1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.

4. Procedure
Subtask 71-61-41-020-058-A

A. Removal of the Protection Covers
(1) Remove the COVER - PROTECTION from the preformed hoses, blower duct and anti-ice duct.

Subtask 71-61-41-480-056-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).

Subtask 71-61-41-020-056-A

C. Engagement of the Air Intake Cowl

Air Intake Cowl Dolly

(1) Remove the bolts (11) and nuts (10), that attach the air intake cowl (1) to the 98N7160H002-000 INLET DOLLY.

NOTE: Remove the top bolt and work down equally on each side when you remove the bolts.

(2) Discard the bolts (11) and nuts (10).
(3) Pull the air intake cowl (1) forward to disengage it from the 98N7160H002-000 INLET DOLLY.

Subtask 71-61-41-420-055-A

D. Installation of the Air Intake Cowl
(1) Lift the air intake cowl (1) until the attach ring is aligned with engine.

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) Engage the two spigots in the engine flange and make sure that the two spigots do not hit the engine flange.
(3) Attach the air intake cowl (1) to the engine flange with the 36 new AIPC 71-11-11-10-060 BOLTS (11) and new AIPC 71-11-11-10-070 NUTS (10).
(4) TORQUE the 36 nuts (10) to between 31.00 and 28.00 lbf.ft (4.20 and 3.80 m.daN )

.
(a)

Torque Sequence Chart

(b)

Torque Sequence Chart

Subtask 71-61-41-420-057-A

E. Installation of the Anti-Ice Duct
(1) Install the new AIPC 30-21-49-05-080 E-SEAL (9) between the anti-ice duct (7) and the air intake cowl (1).
(2) Engage the anti-ice duct (7) to the air intake cowl (1).
(3) Install the coupling (8) that attach the anti-ice duct (7) to the inlet cowl (1).
(4) TORQUE the coupling (8) to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )

.
(5) Install the new AIPC 30-21-49-05-012 STRAP (5):
(a) Install the insulation covers (6) to the anti-ice duct (7).
(b) Install the straps (5) that attach the insulation covers (6) to the duct.
(6) Tighten the straps (5).

Subtask 71-61-41-420-058-A

F. Installation of the Blower Duct

PRE SB LEAP-1A-72-00-0191

(1) Engage the blower duct (4) to the air intake cowl (1).
(2) Install the clamp (3) to the blower duct (4).
(3) TORQUE the clamp (3) to between 46.2 and 41.8 lbf.in (0.52 and 0.47 m.daN )

.

END OF PRE SB LEAP-1A-72-00-0191

Subtask 71-61-41-420-060-A

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

G. Installation of the Blanking Cap

POST SB LEAP-1A-72-00-0191

(1) Apply a layer of engine oil (Material No.CP2442) to the bolt of the clamp (3).
(2) Install the CAP - BLANKING (12) on the air intake cowl (1).
(3) Install the clamp (3) on the CAP - BLANKING (12).
(a) Install the clamp (3) fastening device (bolt of the clamp) radially inward.
(4) TORQUE the clamp (3) to between 46.2 and 41.8 lbf.in (0.52 and 0.47 m.daN )

.

END OF POST SB LEAP-1A-72-00-0191

Subtask 71-61-41-080-053-A

H. Removal of the Tooling

Inlet Cowl Sling

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

Subtask 71-61-41-420-056-A

I. Connection of the Electrical Connectors
(1) In the case of the air intake cowl replacement, install the T12 sensor (Ref. AMM TASK 73-21-15-400-801).
(2) Connect the electrical connector (2) to the T12 sensor.
(3) Install the filler plugs in the hoist points of the air intake cowl.

5. Close-up
Subtask 71-61-41-410-053-A

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 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 71-61-41-820-051-A

B. Do the adjustment of the fan cowl doors (Ref. AMM TASK 71-13-11-820-802).

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