Installation of the Left Fan Cowl [IAE]

TASK 71-13-11-400-010-A
Installation of the Left Fan Cowl

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: DO NOT INSTALL THE FAN COWL(S) WHEN THE WIND SPEED IS 60mph (96km/h) OR MORE. INJURY AND/OR DAMAGE TO THE ENGINE CAN OCCUR IF THE WIND MOVES THE FAN COWL(S).

WARNING: BE CAREFUL IF YOU INSTALL THE FAN COWL(S) WHEN THE WIND SPEED IS 30mph (48kmh) OR MORE. INJURY AND/OR DAMAGE TO THE ENGINE CAN OCCUR IF THE WIND MOVES THE FAN COWL(S).

WARNING: BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE LEFT FAN COWL. IT WEIGHS 93 LB (42 KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

CAUTION: SBN71-0331 (EQUIVALENT TO AIRBUS SERVICE BULLETIN SB 71-1069) INTRODUCES A LOCKABLE LATCH IN THE NUMBER 1 POSITION. THUS, WHEN YOU INSTALL A NEW COWL DOOR, MAKE SURE THAT THE KEEPER IS INSTALLED WITH THE CORRECT LATCH ON THE FAN COWL DOOR. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE 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: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job

NOTE: SBN71-0331 (equivalent to Airbus service bulletin SB 71-1069) introduces a lockable latch in the forward position (latch No. 1) that must be opened and closed and locked with a key and flag assembly. The key and flag assembly are stowed in the cockpit and must not be used if there is damage to the key or flag.

NOTE: If the fan cowl strake configuration to be installed is different from the configuration removed, refer to Service Bulletin (SB): V2500-NAC-71-0258

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	HOIST 100 KG (220 LB)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 38.5 and 31.5 lbf.in (0.44 and 0.36 m.daN )
745-4001-1GSE	1	FAN COWL SLING
OR	OR
IAE1N20404	1	SLING-FAN COWL DOORS
IAE1N20402	1	DOLLY-FAN COWL DOORS

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	NUT, SELF LOCKING	AIPC 71-13-11-80-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-869-002-A	Table of the Maximum Permitted Resistance-Values
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
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 71-13-00-800-010-A	Functional Check of Fan Cowl Latch Tension
TASK 71-13-11-000-010-A	Removal of the Left Fan Cowl 437AL(447AL).
Left Fan Cowl

3. Job Set-up
Subtask 71-13-11-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position.

Subtask 71-13-11-010-054-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 71-13-11-480-051-A ** ON A/C NOT FOR ALL

C. Attach the Sling
(1) Remove the caps (8) from the left fan-cowl sling-points.

Left Fan Cowl ** ON A/C NOT FOR ALL

(2) Attach the IAE1N20404 SLING-FAN COWL DOORS745-4001-1GSE FAN COWL SLING to the HOIST 100 KG (220 LB) and the fan cowl (2).

Subtask 71-13-11-080-051-A ** ON A/C NOT FOR ALL

D. Remove the left fan cowl (2) from the IAE1N20402 DOLLY-FAN COWL DOORS, with the IAE1N20404 SLING-FAN COWL DOORS745-4001-1GSE FAN COWL SLING and the hoist.

Left Fan Cowl ** ON A/C NOT FOR ALL

Subtask 71-13-11-110-050-A ** ON A/C NOT FOR ALL

E. Clean the Fan Cowl:

Left Fan Cowl ** ON A/C NOT FOR ALL

(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) to clean these parts.
(2) The fan cowl hinges (4)
(3) The pylon hinges

Subtask 71-13-11-210-053-A ** ON A/C NOT FOR ALL

F. Examine the left fan cowl hinges (4) and the pylon hinges and make sure that they have no damage.

Left Fan Cowl ** ON A/C NOT FOR ALL

4. Procedure
Subtask 71-13-11-420-051-A ** ON A/C NOT FOR ALL

A. Install the Left Fan Cowl

Left Fan Cowl ** ON A/C NOT FOR ALL

CAUTION: BE CAREFUL WHEN YOU REMOVE/INSTALL THE BOLTS THAT HOLD THE FAN COWL DOOR IN POSITION. IF THE DOOR IS NOT HELD CORRECTLY, DAMAGE CAN OCCUR.

(1) Lift the fan cowl (2) with the IAE1N20404 SLING-FAN COWL DOORS745-4001-1GSE FAN COWL SLING and the hoist and install it at the pylon.
(2) Align the fan cowl hinges (4) with the pylon hinges.
(3) Install the bolts (5) to the left fan-cowl hinges (4) and the pylon hinges.

NOTE: Make sure that the bolts are installed in the positions written during the removal task (Ref. AMM TASK 71-13-11-000-010).

(4) Install the washers (6) and the new 71131180-050NUT, SELF LOCKING7 on to the bolts (5).
(5) TORQUE the nuts (7) to between 38.5 and 31.5 lbf.in (0.44 and 0.36 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

NOTE: The nuts (7) are supplied lubricated. More lubrication is not necessary.

Subtask 71-13-11-080-052-A ** ON A/C NOT FOR ALL

B. Remove the Sling

Left Fan Cowl ** ON A/C NOT FOR ALL

(1) Lower the left fan cowl and remove the IAE1N20404 SLING-FAN COWL DOORS745-4001-1GSE FAN COWL SLING.
(2) Install the caps (8) in to the fan cowl sling points.

Subtask 71-13-11-200-050-A ** ON A/C NOT FOR ALL

C. Check Electrical bonding
(1) Make sure that the resistance value (Ohmic) between the fan cowl door hinge and the pylon is correct (Ref. AMM TASK 20-28-00-869-002).

Subtask 71-13-11-820-050-A ** ON A/C NOT FOR ALL

D. Make sure that the fan cowl latches are aligned (Ref. AMM TASK 71-13-00-800-010).

5. Close-up
Subtask 71-13-11-410-053-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 cowls (Ref. AMM TASK 71-13-00-410-010):
(3) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(4) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(5) Remove the WARNING NOTICE(S).
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 02:29:25 UTC