Removal of the Air Intake Cowl [IAE]

TASK 71-11-11-000-010-B
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 248lb (112kg). 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.

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: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

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	AR	COVER - BLANKING
No specific	AR	HOIST 100 KG (220 LB)
No specific	AR	WARNING NOTICE(S)
745-4001-1GSE	1	FAN COWL SLING
IAE1J12183	1	COVER-PROTECTION
IAE1N20401	1	DOLLY-INLET COWL
IAE1N20403	1	SLING-INLET COWL
IAE1N20404	1	SLING-FAN COWL DOORS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V08-026)	locking compound

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
431AL, 437AL, 438AR
FOR [1000EM2] (ENGINE-2)
441AR, 447AL, 448AR

D. 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)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-22-11-000-010-A	Removal of the P2/T2 Sensor
Air Intake Cowl
Air Intake Cowl

3. Job Set-up
Subtask 71-11-11-941-052-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 71-11-11-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at zone:
(a) FOR [1000EM1] (ENGINE-1)
431AL
(b) FOR [1000EM2] (ENGINE-2)
441AR

Subtask 71-11-11-941-053-A ** ON A/C NOT FOR ALL

C. Put the Support Equipment in Position
(1) Put the IAE1N20401 DOLLY-INLET COWL in position adjacent to the air intake cowl.

Subtask 71-11-11-480-052-A ** ON A/C NOT FOR ALL

D. Attach the Sling

Air Intake Cowl ** ON A/C NOT FOR ALL

(1) Remove the plugs (4), if installed, from the air intake cowl sling points.
(2) Attach the IAE1N20403 SLING-INLET COWL to the hoist and to the air intake cowl.

Subtask 71-11-11-480-057-A ** ON A/C NOT FOR ALL

E. Attach the sling to the left and right fan cowl-doors.

Air Intake Cowl ** ON A/C NOT FOR ALL

(1) If the blank caps (5) are installed, remove them from the left and right fan-cowl-door sling-points.
(2) Attach the IAE1N20404 SLING-FAN COWL DOORS or the 745-4001-1GSE FAN COWL SLING to the HOIST 100 KG (220 LB) and to the left and right fan cowl-doors.

4. Procedure
Subtask 71-11-11-020-053-A ** ON A/C NOT FOR ALL

A. Removal of the Hardware
(1) Remove the insulation from the coupling (2) (Ref. AMM TASK 30-21-49-000-806).
(2) Remove the coupling (2) at the anti-ice duct connection and discard the seal (3).

Air Intake Cowl ** ON A/C NOT FOR ALL

(3) Disconnect the five electrical connectors from the cowl aft bulkhead.

Air Intake Cowl ** ON A/C NOT FOR ALL

(a) Disconnect the three P2/T2 electrical connectors 4010VC-A, 4012VC-A and 4013VC-A.
(b) Disconnect the TAI valve electrical connector 4000DN-A.
(c) Disconnect the interphone jack electrical connector 4011VC-A.
(4) Disconnect the instrument air tube from the union at the cowl aft bulkhead.
(5) Remove the P2/T2 sensor.

NOTE: It is necessary to remove the P2/T2 sensor if the air intake cowl is going for overhaul, (Ref. AMM TASK 73-22-11-000-010).

Subtask 71-11-11-020-051-A ** ON A/C NOT FOR ALL

B. Remove the Air Intake Cowl

Air Intake Cowl ** ON A/C NOT FOR ALL

(1) Hold up the weight of the cowl on the IAE1N20403 SLING-INLET COWL and the hoist.
(2) Remove the bolts (1) at the fan case front flange.
(3) Hold up the weight of the left and right fan cowl doors with the hoist.
(4) Disengage the two forward hold open rods from the attach point brackets and engage them in their stowing brackets (Ref. AMM TASK 71-13-00-410-010).
(5) Move the air intake cowl forward and lower it onto the IAE1N20401 DOLLY-INLET COWL.
(6) Safety the air intake cowl in the IAE1N20401 DOLLY-INLET COWL.

Subtask 71-11-11-620-051-A ** ON A/C NOT FOR ALL

C. Put the applicable COVER - BLANKING on all of the openings, the electrical connectors and the electrical plugs.

Subtask 71-11-11-080-051-A ** ON A/C NOT FOR ALL

D. Remove the Sling

Air Intake Cowl ** ON A/C NOT FOR ALL

(1) Remove the sling (IAE 1N20403) from the air intake cowl.
(2) SBN71-0277: Apply locking compound (Material No.V08-026) to the threads of the plugs (4).
(3) Install the plugs (4) into the air intake cowl sling points.
(4) SBN71-0277: Remove the locking compound from the area around the blanking plugs.

Subtask 71-11-11-480-053-A ** ON A/C NOT FOR ALL

E. Put IAE1J12183 COVER-PROTECTION on the fan case.

[Rev.10 from 2021] 2026.04.01 02:28:45 UTC