Installation of the Fan Cowl Doors [CFMB]

TASK 71-13-11-400-041-A
Installation of the Fan Cowl Doors

CAUTION: ADJUST THE FAN COWL DOORS WHEN A NEW FAN 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.

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

1. Reason for the Job

NOTE: SB RA32071-163 (equivalent to Airbus service bulletin SB 71-1068) 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. The key always has to stay with the latch.

NOTE: If the fan cowl to be removed has a strake installed, the replacement fan cowl must also have a strake installed.
For aircraft A320, strakes must be installed on the inner side only.
For aircraft A318, A319, A321, strakes must be installed on both sides.

NOTE: Engine and Nacelle are 2 ways interchangeable but with condition.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	PAD - UNIVERSAL ATTACH
No specific	AR	WARNING NOTICE(S)
RSE1113	1	SLING-FAN COWL
RSE1117	1	PROTECTOR THREAD COWL DOOR BOLT

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
40	COTTER PINS	AIPC 71-13-11-01-010

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-869-002-A	Table of the Maximum Permitted Resistance-Values
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 71-13-00-800-041-A	Adjustment of the Fan Cowl Doors
Fan Cowl Door

3. Job Set-up
Subtask 71-13-11-860-052-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 1M(3 FT) is in position.
(4) Make sure that strakes are installed on the inboard and outboard fan cowl doors of each propulsion system.

Subtask 71-13-11-860-052-B ** ON A/C NOT FOR ALL

4. Procedure
Subtask 71-13-11-020-056-A ** ON A/C NOT FOR ALL

A. Remove filler plugs of the hoist points from the fan cowl door. Keep the filler plugs for installation when the task is complete.

Subtask 71-13-11-480-055-A ** ON A/C NOT FOR ALL

B. Installation of the Tooling
(1) Install the PAD - UNIVERSAL ATTACH (15) in the hoist points on the fan cowl door (10).
(2) Attach the RSE1113 SLING-FAN COWL to the universal attach pads (15).
(3) Install the RSE1117 PROTECTOR THREAD COWL DOOR BOLT (25) on each of the hinge bolt (20).

Subtask 71-13-11-420-050-A ** ON A/C NOT FOR ALL

C. Installation of the Fan Cowl Door
(1) Use the RSE1113 SLING-FAN COWL (5) to lift the fan cowl door (10) and put it into position on the engine.
(2) Make sure the fan cowl door hinge is aligned with the pylon hinge fitting.
(3) Install the hinge bolts (20) and the washers (45) in the sequence that follows: Forward, center, rear. The bolt heads must point forward.

Subtask 71-13-11-080-057-A ** ON A/C NOT FOR ALL

D. Remove the thread protectors from the hinge bolts (20).

Subtask 71-13-11-420-057-A ** ON A/C NOT FOR ALL

E. Installation of the Bolts and Nuts
(1) Install the washers (30) and the nuts (35) on the hinge bolts (20).
(2) Tighten the bolts finger tight and install new AIPC 71-13-11-01-010 COTTER PINS (40).

Subtask 71-13-11-869-065-A ** ON A/C NOT FOR ALL

F. 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 71-13-11-080-058-A ** ON A/C NOT FOR ALL

G. Removal of the Tooling
(1) Remove the RSE1113 SLING-FAN COWL from the universal attach pads (15).
(2) Remove the universal attach pads (15) from the fan cowl door (10).

Subtask 71-13-11-420-058-A ** ON A/C NOT FOR ALL

H. Install the filler plugs in the hoist points on the fan cowl door (10).

Subtask 71-13-11-210-050-A ** ON A/C NOT FOR ALL

I. Adjust the fan cowl door (Ref. AMM TASK 71-13-00-800-041).

5. Close-up
Subtask 71-13-11-410-050-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 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 06:43:08 UTC