DOC AIRBUS | AMM A320FAdjustment of the Fan Cowl Doors Clearance [CFML]
TASK 71-13-11-820-802-A
Adjustment of the Fan Cowl Doors Clearance
The fan cowls must be adjusted each time the air intake cowl, the fan cowl door, the thrust reverser or the engine are replaced.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 71-13-11-941-086-A
Subtask 71-13-11-020-067-A
Subtask 71-13-11-410-076-A
[Rev.10 from 2021]
2026.04.01 12:58:02 UTC
Adjustment of the Fan Cowl Doors Clearance
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 WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobThe fan cowls must be adjusted each time the air intake cowl, the fan cowl door, the thrust reverser or the engine are replaced.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CPNCL01237) | Polysulfide Sealant - General Purpose Interfay |
| No specific | MODELLING CLAY |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1) | |
| 437AL, 438AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2) | |
| 447AL, 448AR | |
| 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 71-13-13-820-801-A | Adjustment of the Fan Cowl Door Latches |
Spigot and BoltSubtask 71-13-11-941-086-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) Put WARNING NOTICE(S) in position to tell persons not to operate:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 71-13-11-010-082-A (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) Put WARNING NOTICE(S) in position to tell persons not to operate:
- The ENG/MODE selector switch, and
- The ENG/MASTER 1(2) control switch.
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
B. Get Access
(1) Open the fan cowl doors (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.
4. Procedure(1) Open the fan cowl doors (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.
Subtask 71-13-11-020-067-A
A. Removal of the Bolt and Spigots
(1) At the forward housing location in the spigot interface:
(a) Remove the nut (5), washers (2), (3) and (4) and the spigot (1).
(a) Remove the nut (5), washers (2), (3) and (4), the spacer (7) and the bolt (6).
Subtask 71-13-11-420-069-A (1) At the forward housing location in the spigot interface:
(a) Remove the nut (5), washers (2), (3) and (4) and the spigot (1).
NOTE: Record the spigot location to do the installation at the same position.
NOTE: Spigot location is inverted at housing L3, in relation with housing L1 and housing L2.
(2) At the forward housing location in the bolt interface: (a) Remove the nut (5), washers (2), (3) and (4), the spacer (7) and the bolt (6).
NOTE: Record the bolt location to do the installation at the same position.
NOTE: Bolt location is inverted at housing L3, in relation with housing L1 and housing L2.
(3) Do steps 4.A.(1) and 4.1.(2) in middle and rear keeper housings again. B. Preparation of the Housing Interface
(1) At the forward housing location in the spigot interface:
(b) Keep the washers (2), (3) and (4) in the opposite side of the spigot (1) and install the nut (5).
(c) TORQUE the nut (5) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft )
at the latch interface.
(2) At the forward housing location in the bolt interface:
(b) Keep the washers (2), (3) and (4) in the opposite side of the bolt (6) and install the nut (5).
(c) TORQUE the nut (5) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft ) at the latch interface.
(3) Do steps 4.B.(1) and 4.B.(2) in middle and rear keeper housings again.
Subtask 71-13-11-410-074-A (1) At the forward housing location in the spigot interface:
CAUTION:
MAKE SURE THAT YOU INSTALL THE BOLTS AND THE SPIGOTS IN THE POSITIONS THAT YOU RECORDED BEFORE YOU REMOVED THEM.
(a) Install the spigot (1) again. (b) Keep the washers (2), (3) and (4) in the opposite side of the spigot (1) and install the nut (5).
(c) TORQUE the nut (5) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft )
at the latch interface. (2) At the forward housing location in the bolt interface:
CAUTION:
MAKE SURE THAT YOU INSTALL THE BOLTS AND THE SPIGOTS IN THE POSITIONS THAT YOU RECORDED BEFORE YOU REMOVED THEM.
(a) Install the spacer (7) and the bolt (6) again. (b) Keep the washers (2), (3) and (4) in the opposite side of the bolt (6) and install the nut (5).
(c) TORQUE the nut (5) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft )
at the latch interface. (3) Do steps 4.B.(1) and 4.B.(2) in middle and rear keeper housings again.
C. Close the Fan Cowl Doors
(1) Make sure that the work area is clean and clear of tool(s) 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) Make sure that the fan cowl doors are closed and are correctly latched.
(4) Make sure that the fan cowl doors rest into forward and aft engine interfaces.
(5) Make sure that the bolt (6) and the spigot (1) does not touch the RH housing for the forward latch L1, rear latch L3 and middle latch L2.
(6) If step 4.C.(5) is unsatisfactory, contact SAFRAN NACELLE.
Subtask 71-13-11-820-053-A (1) Make sure that the work area is clean and clear of tool(s) 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) Make sure that the fan cowl doors are closed and are correctly latched.
(4) Make sure that the fan cowl doors rest into forward and aft engine interfaces.
(5) Make sure that the bolt (6) and the spigot (1) does not touch the RH housing for the forward latch L1, rear latch L3 and middle latch L2.
(6) If step 4.C.(5) is unsatisfactory, contact SAFRAN NACELLE.
D. Latch Tension Adjustment
(1) Get access to fan cowl latch area.
(2) Put the INSPECTION CREEPER below the engine at the fan cowl location.
(3) Proceed to adjust the latch tension:
(b) Pull the latch handle to the open position.
(d) Move the latch handle until the keeper make contact with the housing wall and do a check visually.
(e) Start closing the handle without measuring the load.
(f) When the keeper movement is stopped, the load must be measured with a GAGE - PUSH-PULL located in the latch handle hole.
(g) Put the GAGE - PUSH-PULL in position at the end of the latch hole.
(h) Close the latch slowly with the GAGE - PUSH-PULL and measure the force necessary to fully close the latch handle.
(i) A force of between 3.3 daN (7.42 lbf) and 4.1 daN (9.22 lbf) is necessary to close and give the correct pre-load tension to the latch handle.
(j) If step 4.D.(3)(g) is unsatisfactory, adjust the latch tension as follows:
1 Pull the latch handle to the full open position.
2 Use a WRENCH - HEXAGONAL or a SCREWDRIVER and turn the adjustment nut of the keeper.
(k) Do step 4.D.(3)(a) thru 4.D.(3)(h) for the latch L3.
(n) If step 4.D.(3)(m) is unsatisfactory, repeat the step 4.D.(3)(a) thru 4.D.(3)(m) until the closure force is satisfactory.
Subtask 71-13-11-820-054-A (1) Get access to fan cowl latch area.
(2) Put the INSPECTION CREEPER below the engine at the fan cowl location.
(3) Proceed to adjust the latch tension:
NOTE: Perform the adjustment of tension in the following sequence: middle latch L2, aft latch L3 and forward latch L1.
(a) Push the latch handle trigger of the middle latch L2 to open the latch. (b) Pull the latch handle to the open position.
NOTE: The aft latch L3 and forward latch L1 must be closed.
(c) Make sure that the hook is engaged with its keeper. (d) Move the latch handle until the keeper make contact with the housing wall and do a check visually.
(e) Start closing the handle without measuring the load.
(f) When the keeper movement is stopped, the load must be measured with a GAGE - PUSH-PULL located in the latch handle hole.
(g) Put the GAGE - PUSH-PULL in position at the end of the latch hole.
(h) Close the latch slowly with the GAGE - PUSH-PULL and measure the force necessary to fully close the latch handle.
(i) A force of between 3.3 daN (7.42 lbf) and 4.1 daN (9.22 lbf) is necessary to close and give the correct pre-load tension to the latch handle.
(j) If step 4.D.(3)(g) is unsatisfactory, adjust the latch tension as follows:
1 Pull the latch handle to the full open position.
2 Use a WRENCH - HEXAGONAL or a SCREWDRIVER and turn the adjustment nut of the keeper.
NOTE: Turn the adjustment nut clockwise to increase the tension and counterclockwise to decrease the tension.
3 Do step 4.D.(3)(a) thru 4.D.(3)(h) until the closure force of the latch L2 is satisfactory. (k) Do step 4.D.(3)(a) thru 4.D.(3)(h) for the latch L3.
NOTE: Latches L1 and L2 must be closed.
(l) Do step 4.D.(3)(a) thru 4.D.(3)(h) for the latch L1. NOTE: Latches L2 and L3 must be closed.
(m) Do a final check in accordance with the sequence L2, L3 and L1 to make sure that the values of the closure forces are satisfactory. (n) If step 4.D.(3)(m) is unsatisfactory, repeat the step 4.D.(3)(a) thru 4.D.(3)(m) until the closure force is satisfactory.
NOTE: Several adjustment processes of the fan cowl latch tension can be necessary to get the correct closure force.
E. Measurement and Record of the Clearance A between each Latch Interface Points
(1) Get access to the fan cowl latch area.
(2) Make sure that the INSPECTION CREEPER is below the engine at the fan cowl location.
(3) Two procedures to measure the Clearance A:
(a) Measure the clearance A with MODELLING CLAY:
2 Make three cylinders of 30 mm (1.18 in.) approximately of diameter and of a length enough to obtain a bolt mark on the MODELLING CLAY surface when the latch is closed.
3 Install the cylinders on the bolt interface of the three latch housing.
5 Open the right fan cowl door to the fully open position (Ref. AMM TASK 71-13-00-010-803).
6 Wait until the MODELLING CLAY is cured.
7 Do a check to see if the MODELLING CLAY is cured.
8 Record the reference of the housing in the external surface of each MODELLING CLAY cylinder (L1, L2 or L3).
9 Remove the three MODELLING CLAY cylinders from each latch housing.
10 Make sure that there is no remaining part of the MODELLING CLAY on the housings surfaces.
11 Cut the MODELLING CLAY cylinders along their revolution edges.
12 Measure the clearance register in each cylinder (Value A).
(b) Measure the clearance B with GAGE - CALIPER:
3 Calculate the value of A with this formula:
A=B- 14.8 mm (0.58 in.).
Subtask 71-13-11-820-055-A (1) Get access to the fan cowl latch area.
(2) Make sure that the INSPECTION CREEPER is below the engine at the fan cowl location.
(3) Two procedures to measure the Clearance A:
(a) Measure the clearance A with MODELLING CLAY:
NOTE: It is necessary to use a commercial MODELLING CLAY with rapid cured characteristic.
1 Open the right fan cowl doors to the fully open position (Ref. AMM TASK 71-13-00-010-803). 2 Make three cylinders of 30 mm (1.18 in.) approximately of diameter and of a length enough to obtain a bolt mark on the MODELLING CLAY surface when the latch is closed.
3 Install the cylinders on the bolt interface of the three latch housing.
NOTE: Bolt location is inverted at housing L3, in relation with housing L1 and housing L2.
4 Close the right fan cowl door (Ref. AMM TASK 71-13-00-410-803). 5 Open the right fan cowl door to the fully open position (Ref. AMM TASK 71-13-00-010-803).
6 Wait until the MODELLING CLAY is cured.
7 Do a check to see if the MODELLING CLAY is cured.
8 Record the reference of the housing in the external surface of each MODELLING CLAY cylinder (L1, L2 or L3).
9 Remove the three MODELLING CLAY cylinders from each latch housing.
10 Make sure that there is no remaining part of the MODELLING CLAY on the housings surfaces.
11 Cut the MODELLING CLAY cylinders along their revolution edges.
12 Measure the clearance register in each cylinder (Value A).
(b) Measure the clearance B with GAGE - CALIPER:
NOTE: It is necessary to use a GAGE - CALIPER.
1 With the left fan cowl doors closed and latches closed, measure the clearance between housings for each latch with a GAGE - CALIPER (Value B). NOTE: As a recommendation, the best zone considered to measure the clearance is at the bolt side.
NOTE: Bolt location is inverted at housing L3, in relation with housing L1 and housing L2.
NOTE: Make sure to measure the distance between the housing and not the distance between the skins.
2 Record the measure of the clearance between the housings for each latch. 3 Calculate the value of A with this formula:
A=B- 14.8 mm (0.58 in.).
F. Adjustment
(1) Get access to the housing.
(a) Remove the nut (5), washers (2), (3) and (4), the bolt (6), spacer (7) and the spigot (1).
(b) Take the value A as reference to calculate the thickness of the washers necessary to supplement the spigot (1) of each housing.
.
.
(e) Do step F.(1)(d) for the bolt (6) and the spigot (1) of housings L2 and L3.
Subtask 71-13-11-410-075-A (1) Get access to the housing.
(a) Remove the nut (5), washers (2), (3) and (4), the bolt (6), spacer (7) and the spigot (1).
(b) Take the value A as reference to calculate the thickness of the washers necessary to supplement the spigot (1) of each housing.
NOTE: The thickness values for the washer are:
(c) Calculate the number of washers necessary to supplement the bolt (6) and the spigot (1) of each housing with this table: - 7 washers NAS1149C0563R with a thickness of 1.6 mm (0.063 in.).
- 2 washers NAS1149C0532R with a thickness of 0.8 mm (0.031 in.).
- 1 washer NAS1149C0516R with a thickness of 0.4 mm (0.016 in.)
| Thickness of washers necessary to give the clearance A | Number of washer to install | ||
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 0.4 mm (0.016 in.) | 0 | 0 | 1 |
| 0.8 mm (0.031 in.) | 0 | 1 | 0 |
| 1.2 mm (0.047 in.) | 0 | 1 | 1 |
| 1.6 mm (0.063 in.) | 1 | 0 | 0 |
| 2.0 mm (0.079 in.) | 1 | 0 | 1 |
| 2.4 mm (0.094 in.) | 1 | 1 | 0 |
| 2.8 mm (0.110 in.) | 1 | 1 | 1 |
| 3.2 mm (0.126 in.) | 2 | 0 | 0 |
| 3.6 mm (0.142 in.) | 2 | 0 | 1 |
| 4.0 mm (0.157 in.) | 2 | 1 | 0 |
| 4.4 mm (0.173 in.) | 2 | 1 | 1 |
| 4.8 mm (0.189 in.) | 3 | 0 | 0 |
| 5.2 mm (0.205 in.) | 3 | 0 | 1 |
| 5.6 mm (0.220 in.) | 3 | 1 | 0 |
| 6.0 mm (0.236 in.) | 3 | 1 | 1 |
| 6.4 mm (0.252 in.) | 4 | 0 | 0 |
| 6.8 mm (0.268 in.) | 4 | 0 | 1 |
| 7.2 mm (0.283 in.) | 4 | 1 | 0 |
| 7.6 mm (0.299 in.) | 4 | 1 | 1 |
| 8.0 mm (0.315 in.) | 5 | 0 | 0 |
| 8.4 mm (0.331 in.) | 5 | 0 | 1 |
| 8.8 mm (0.346 in.) | 5 | 1 | 0 |
| 9.2 mm (0.362 in.) | 5 | 1 | 1 |
| 9.6 mm (0.378 in.) | 6 | 0 | 0 |
| 10.0 mm (0.394 in.) | 6 | 0 | 1 |
| 10.4 mm (0.409 in.) | 6 | 1 | 0 |
| 10.8 mm (0.425 in.) | 6 | 1 | 1 |
| 11.2 mm (0.441 in.) | 7 | 0 | 0 |
| 11.6 mm (0.457 in.) | 7 | 0 | 1 |
| 12.0 mm (0.472 in.) | 7 | 1 | 0 |
| 12.4 mm (0.488 in.) | 7 | 1 | 1 |
| 12.8 mm (0.504 in.) | 7 | 2 | 0 |
| 13.2 mm (0.520 in.) | 7 | 2 | 1 |
NOTE: For each housing the number of washers of the bolt (6) and of the spigot (1) must be the same.
CAUTION:
MAKE SURE THAT YOU INSTALL THE BOLTS AND THE SPIGOTS IN THE POSITIONS THAT YOU RECORDED BEFORE YOU REMOVED THEM.
(d) At the housing L1: NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) - general purpose interfay.
1 Put the necessary washer (2) and/or (3) and/or (4) below the head of the head of the bolt (6). NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
2 Install the spacer (7), the bolt (6) and the washers in the keeper. NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
3 Put the remaining washers in the rear side of the bolt (6). NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
4 Install the nut (5). NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
5 TORQUE the nut (5) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft ) . NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
6 Put the necessary washer (2) and/or (3) and/or (4) below the head of the spigot (1). NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
7 Install the spigot (1) and the washers in the keeper. NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
8 Put the remaining washers in the rear side of the spigot (1). NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
9 Install the nut (5). NOTE: Wet install the fasteners with Polysulfide Sealant - General Purpose Interfay (Material No.CPNCL01237) .
10 TORQUE the nut (5) to between 1.79 and 1.38 m.daN (13.20 and 10.18 lbf.ft ) . (e) Do step F.(1)(d) for the bolt (6) and the spigot (1) of housings L2 and L3.
G. Close the Fan Cowl Doors
(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) Make sure that fan cowl doors are closed and correctly latched.
(4) Make sure that the fan cowl doors rest into forward and aft engine interfaces.
Subtask 71-13-11-820-057-A (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) Make sure that fan cowl doors are closed and correctly latched.
(4) Make sure that the fan cowl doors rest into forward and aft engine interfaces.
H. Final Check
(1) Get access to fan cowl latch area.
(2) Put the INSPECTION CREEPER below the engine at the fan cowl location.
(3) Proceed to adjust the latch tension:
(a) Do the step 4.D.(3)(a) thru 4.D.(3)(f) for the latch L2.
(b) Do the step 4.D.(3)(a) thru 4.D.(3)(f) for the latch L3.
(c) Do the step 4.D.(3)(a) thru 4.D.(3)(f) for the latch L1.
(d) A force of between 3.3 daN (7.42 lbf) and 4.1 daN (9.22 lbf) is necessary to close and give the correct adjustment of the fan cowl doors clearance.
(e) If step 4.H.(3)(d) is unsatisfactory, proceed as follows:
1 In L1 housing, check that there is no contact between spigot and the bolt with the RH L1 housing.
a Do a visual inspection of the zone.
b Introduce a GAGE - FEELER between the existing gap between the fan cowl doors.
3 Second procedure (alternative procedure):
a Open the left fan cowl door (Ref. AMM TASK 71-13-00-010-803).
b Do a mark on the bolt head with a MARKER - TEMPORARY, MEDIUM.
c Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803).
d Close the latches.
e Open the right fan cowl door (Ref. AMM TASK 71-13-00-010-803).
f Examine if there is a mark on the forward wall of the housing.
4 In L2 housing, check that there are no contact between spigot and the bolt with the RH L2 housing.
a Do the step 4.H.(3)(e)1_ for the L2 housing.
5 In L3 housing, check that there are no contact between spigot and the bolt with the RH L3 housing.
a Do the step 4.H.(3)(e)1_ for the L3 housing.
6 If contact is detected between spigot and/or bolt with the RH housing:
a Decrease the thickness of washers in 0.4 mm (0.016 in.) in the bolt (6) and in the spigot (1).
b Do again step 4.H.(3)(a) thru 4.H.(3)(d).
c If the closure force of one latch is not between 3.3 daN (7.42 lbf) and 4.1 daN (9.22 lbf) do again the procedure at the step 4.A.
Subtask 71-13-11-820-056-A (1) Get access to fan cowl latch area.
(2) Put the INSPECTION CREEPER below the engine at the fan cowl location.
(3) Proceed to adjust the latch tension:
(a) Do the step 4.D.(3)(a) thru 4.D.(3)(f) for the latch L2.
(b) Do the step 4.D.(3)(a) thru 4.D.(3)(f) for the latch L3.
(c) Do the step 4.D.(3)(a) thru 4.D.(3)(f) for the latch L1.
(d) A force of between 3.3 daN (7.42 lbf) and 4.1 daN (9.22 lbf) is necessary to close and give the correct adjustment of the fan cowl doors clearance.
(e) If step 4.H.(3)(d) is unsatisfactory, proceed as follows:
1 In L1 housing, check that there is no contact between spigot and the bolt with the RH L1 housing.
NOTE: You can use one of the two procedures below to make sure if the spigot or the bolt touch the RH housing:
2 First procedure (alternative procedure available): a Do a visual inspection of the zone.
b Introduce a GAGE - FEELER between the existing gap between the fan cowl doors.
3 Second procedure (alternative procedure):
a Open the left fan cowl door (Ref. AMM TASK 71-13-00-010-803).
b Do a mark on the bolt head with a MARKER - TEMPORARY, MEDIUM.
c Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803).
d Close the latches.
e Open the right fan cowl door (Ref. AMM TASK 71-13-00-010-803).
f Examine if there is a mark on the forward wall of the housing.
4 In L2 housing, check that there are no contact between spigot and the bolt with the RH L2 housing.
a Do the step 4.H.(3)(e)1_ for the L2 housing.
5 In L3 housing, check that there are no contact between spigot and the bolt with the RH L3 housing.
a Do the step 4.H.(3)(e)1_ for the L3 housing.
6 If contact is detected between spigot and/or bolt with the RH housing:
a Decrease the thickness of washers in 0.4 mm (0.016 in.) in the bolt (6) and in the spigot (1).
b Do again step 4.H.(3)(a) thru 4.H.(3)(d).
c If the closure force of one latch is not between 3.3 daN (7.42 lbf) and 4.1 daN (9.22 lbf) do again the procedure at the step 4.A.
I. Adjustment of the Fan Cowl Doors Latches
(1) Do the adjustment of the fan cowl door latches (Ref. AMM TASK 71-13-13-820-801).
5. Close-up(1) Do the adjustment of the fan cowl door latches (Ref. AMM TASK 71-13-13-820-801).
Subtask 71-13-11-410-076-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 INSPECTION CREEPER.
(4) Remove the WARNING NOTICE(S).
(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 INSPECTION CREEPER.
(4) Remove the WARNING NOTICE(S).