Installation of the Fan Cowl Door Latches and Keepers [CFMB]

TASK 71-13-13-400-041-A
Installation of the Fan Cowl Door Latches and Keepers

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

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

ZONE: 400
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.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 105 and 95 lbf.in (1.19 and 1.07 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP5063)	silicone lubricant

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
40	COTTER PIN	AIPC 71-13-13-01-010

E. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
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 Latches and Clevis
Fan Cowl Door Keepers

3. Job Set-up
Subtask 71-13-13-860-051-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).

Subtask 71-13-13-010-055-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

4. Procedure
Subtask 71-13-13-140-050-A ** ON A/C NOT FOR ALL

A. Make sure that the surface where the bolt (20) is to be installed is clean.

Subtask 71-13-13-640-050-A ** ON A/C NOT FOR ALL

B. Clean the threads of the bolt (20) and apply silicone lubricant (Material No.CP5063) to the threads.

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

C. Installation of the Fan Cowl Door Latches and Keepers

PRE SB RA32071-117

PRE SB RA32071-163

(1) Install the latch (45) on the left fan cowl door with the bolt (20), bushings (25), washer (30) and nut (35).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(2) TORQUE the nut (35) to between 105 and 95 lbf.in (1.19 and 1.07 m.daN )

and install a new AIPC 71-13-13-01-010 COTTER PIN (40).
(3) Install the housing (55) on the right fan cowl door with the bolts (60), washers (65) and nuts (70).
(4) TORQUE the nuts (70) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(5) Install the clevis (50) in the housing unit (55).

CAUTION: DO NOT TURN THE CLEVISES. IF YOU TURN THE CLEVISES, YOU CAN CAUSE DAMAGE TO THE HOUSING GUIDE. IF THE GUIDE IS DAMAGED, THE CLEVIS CAN TURN. IF THE CLEVIS CAN TURN, THE CLEVIS CAN NOT ENGAGE CORRECTLY WITH THE LATCH AND CAN KEEP THE LATCH FROM CLOSING CORRECTLY. IF THE LATCHES ARE NOT CLOSED CORRECTLY, THE FAN COWLS CAN OPEN IN FLIGHT.

(a) Put the threaded end of the clevis (50) into the housing (55) until it touches the nut (75). Make sure that the guide of the housing (55) is in the groove of the clevis (50).
(b) Turn the nut (75) counterclockwise until it engages the clevis (50) and you can see some of the threads of the clevis (50) at the back of the housing (55).

END OF PRE SB RA32071-117

END OF PRE SB RA32071-163

Subtask 71-13-13-420-070-A ** ON A/C NOT FOR ALL

D. Installation of the Fan Cowl Door Latches and Keepers

POST SB RA32071-117

PRE SB RA32071-163

(1) Install the latch (45) on the left fan cowl door with the bolt (20), bushings (25), washer (30) and nut (35).
(2) TORQUE the nut (35) to between 105 and 95 lbf.in (1.19 and 1.07 m.daN )

.
(3) Installation of the cotter pin:

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(a) Install a new AIPC 71-13-13-01-010 COTTER PIN (40).
(4) Install the housing (55) and the restrainer (80) on the right fan cowl door with the bolts (60), the washers (65) and the nuts (70).
(5) TORQUE the nuts (70) to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(6) Install the clevis (50) in the housing (55).

CAUTION: DO NOT TURN THE CLEVIS. IF YOU TURN THE CLEVIS, YOU CAN CAUSE DAMAGE TO THE GUIDE OF THE HOUSING.IF THE GUIDE IS BROKEN,THE CLEVIS CAN TURN AND IT CAN NOT ENGAGE CORRECTLY WITH THE LATCH AND KEEP THE LATCH FROM CLOSING CORRECTLY. IF THE LATCHES ARE NOT CLOSED CORRECTLY, THE FAN COWLS CAN OPEN IN FLIGHT.