W DOC AIRBUS | AMM A320F

Replace Damaged Thinwall Self Lock Inserts [IAE]

TASK 70-35-26-300-010-A
Replace Damaged Thinwall Self Lock Inserts

1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Consumable Materials
REFERENCE
DESIGNATION
(Material No.V04-004)
jointing compound
 B. Referenced Information
REFERENCE
DESIGNATION
F Thinwall insert removal
F Installation tool data
F Installation depth
F Bolt thread diameter in relation to serration contour
F Aligned serrations
F Swage tool data
F Swaged thinwall insert and tool
F Specified dimensions
3. Job Set-up
Subtask 70-35-26-869-050-A ** ON A/C NOT FOR ALL
A. General
4. Procedure
Subtask 70-35-26-350-050-A ** ON A/C NOT FOR ALL
A. Remove the Thinwall Insert
F Thinwall insert removal ** ON A/C NOT FOR ALL
CAUTION: YOU MUST NOT DAMAGE THE THREADS OR SERRATIONS IN THE HOLE.
   (1) Remove the swaged lock device:
     (a) Select the correct removal tool (Ref Table 6).
     (b) Screw the tool into the insert.
     (c) Stop when the bottom of the tool touches the bottom of the counterbore.
     (d) Remove the tool.
   (2) Remove the insert:
     (a) Select the correct drive tool.
     (b) Turn the counterclockwise to remove the insert.
Subtask 70-35-26-220-050-A ** ON A/C NOT FOR ALL
B. Inspect the Hole
   (1) Make sure there is no damage or unwanted material in the counterbore, tapped hole and serrations.
   (2) Use a thread gage to inspect the thread.
Subtask 70-35-26-350-051-A ** ON A/C NOT FOR ALL
C. Install the Thinwall Insert
F Installation tool data ** ON A/C NOT FOR ALL
F Installation depth ** ON A/C NOT FOR ALL
   (1) Apply a layer of jointing compound (Material No.V04-004) to the insert.
     (a) Let the insert air dry for 10 minutes before installation.
   (2) Select the correct installation tool (Ref Table 3).
   (3) Turn the tool by hand, in a clockwise direction to install the insert.
   (4) Stop when the tool face touches the surface of the component.
     (a) Make sure the insert is smooth with, or just below the bottom of the chamfer.
Subtask 70-35-26-350-052-A ** ON A/C NOT FOR ALL
D. Swage the Thinwall Insert
F Bolt thread diameter in relation to serration contour ** ON A/C NOT FOR ALL
F Aligned serrations ** ON A/C NOT FOR ALL
F Swage tool data ** ON A/C NOT FOR ALL
F Swaged thinwall insert and tool ** ON A/C NOT FOR ALL
   (1) Align the serrations:
     (a) If a serrated counterbore is used, you must make sure the serrations are aligned.
   (2) Lock the insert:
     (a) Apply the minimum force necessary to the swage tool, until the nylon stop washer on the tool touches the surface of the component (Ref Table 4).
Subtask 70-35-26-220-051-A ** ON A/C NOT FOR ALL
E. Inspect the Thinwall Insert
F Specified dimensions ** ON A/C NOT FOR ALL
   (1) Make sure the dimensions of the swaged insert agree with those specified (Ref Table 5).
     (a) As an alternative to the applicable after swage check gage in Table 5, it is permitted to use the after swage check gage that the thinwall insert manufacturer specifies for the installed thinwall insert.
   (2) Examine the swaged insert and the adjacent material for damage. Flaking or damage to the silver layer is permitted in the counterbore only. Remove any loose flakes of material from the silver layer. Do not let the flakes make contact with any mating surfaces of the component.
   (3) Inspect the internal thread for damage from the swaging procedure:
CAUTION: YOU MUST NOT CLEAN THE INTERNAL THREAD OF THE INSERT WITH A TAP. IF YOU DO, DAMAGE TO THE INSERT WILL OCCUR.
     (a) Select the correct thread gage or bolt.
     (b) The thread gage or bolt must screw by hand easily into the insert.
     (c) Stop when the thread gage or bolt touches the lock thread.
     (d) If the thread gage or bolt cannot be screwed by hand easily into the insert, replace the thinwall insert with a new thinwall insert.

Table 1
Bolt thread diameter
Short inserts
Lenght+/- 0.25mm (0.0098in.)
Long inserts
Lenght+/- 0.30mm (0.0118in.)
Tapped hole diameter
0.1900-32
UNJF
AS52760
7.37
(0.290)
AS52790
1.07
(0.475)
0.2500-28
UNJF
0.2500-28
UNJF
AS52761
9.65
(0.380)
AS52791
15.11
(0.595)
0.3125-24
UNJF
0.3125-24
UNJF
AS52762
11.94
(0.470)
AS52792
18.29
(0.720)
0.3750-24
UNJF
0.3750-24
UNJF
AS52763
14.22
(0.560)
AS52793
22.22
(0.875)
0.4375-20
UNJF
0.4375-20
UNJF


U760329
25.40
(1.000)
0.5000-20
UNJF
0.5000-20
UNJF


U760330
28.57
(1.124)
0.5625-24
UNJF

Table 2
Bolt thread diameter
Short inserts
AA mm (in.)
DIA AB mm (in.)
DIA AC mm (in.)
AD mm (in.)
ANGLE AE
0.1900-32
UNJF
AS52760
0.305
(0.012)
6.77
(0.266)
6.57
((0.258)
0.08
(0.003)
80.3
0.2500-28
UNJF
AS52761
0.300
(0.118)
8.55
(0.337)
8.32
(0.327)
0.09
(0.0035)
82.0
0.3125-24
UNJF
AS52762
0.360
(0.014)
10.22
(0.402)
9.90
(0.389)
0.10
(0.0039)
83.5
0.3750-24
UNJF
AS52763
0.383
(0.015)
11.67
(0.459)
11.39
(0.448)
0.10
(0.0039)
84.5

Table 3
Short inserts
Long inserts
A mm (in.) +/-0.125 (0.0049)
B max mm (in.)
Wylcut-Swift Tool Part No
AS52760
AS52790
3.775 (0.147)
4.52 (0.178)
WSDW-19
AS52761
AS52791
5.175 (0.204)
5.77 (0.227)
WSDW-25
AS52762
AS52792
6.575 (0.259)
6.76 (0.266)
WSDW-31
AS52763
AS52793
8.075 (0.318)
8.41 (0.331)
WSDW-37

U760329
9.375 (0.369)
8.94 (0.352)
WSDW-43

U760330
10.975 (0.432)
10.67 (0.420)
WSDW-50

Table 4
Short inserts
Long inserts
DIA B mm (in.) +/-0.015 (0.0006)
DIA C mm (in.) +/-0.127 (0.005)
DIA D mm (in.) +/-0.25 (0.0098)
Wylcut Swift Part No
AS52760
AS52790
5.375 (0.212)
1.829 (0.072)
0.65 (0.025)
WSST-19
AS52761
AS52791
7.125 (0.281)
1.778 (0.070)
0.80 (0.031)
WSST-25
AS52762
AS52792
8.775 (0.345)
1.702 (0.067)
1.00 (0.039)
WSST-31
AS52763
AS52793
10.375 (0.408)
2.311 (0.091)
1.10 (0.043)
WSST-37

U760329
11.955 (0.471)
2.413 (0.095)
1.10 (0.043)
WSST-43

U760330
13.625 (0.536)
2.413 (0.095)
1.10 (0.043)
WSST-50

Table 5
Short inserts
Long inserts
DIA A mm (in.)
B depth min mm (in.)
After swage check gage
AS52760
AS52790
5.36 (0.211)
1.702 (0.067)
726016*
AS52761
AS52791
7.11 (0.279)
1.651 (0.065)
726588*
AS52762
AS52792
8.76 (0.344)
1.575 (0.062)
726009*
AS52763
AS52793
10.36 (0.407)
2.185 (0.086)
726592*

U760329
11.94 (0.471)
2.286 (0.09)
726030*

U760330
13.61 (0.535)
2.286 (0.09)
726033*
* As an alternative, it is permitted to use the after swage check gage that the thinwall insert manufacturer specifies for the installed thinwall insert.

Table 6
Short inserts
Long inserts
Cutter threader diameter W (BS1580)
Major diameter inches
Pitch diameter inches
Diameter X mm (in.)
Y mm (in.) Tolerance +/- 0.3
Wylcut Swift Part Number
AS52760
AS52790
0.1870-32
UNS-3A
0.1870
0.1810
0.1667
0.1644
6.37
(0.25)
8.00
(0.315)
WSIRT-19
AS52761
AS52791
0.2470-28
UNS-3A
0.2470
0.2405
0.2238
0.2212
7.96
(0.313)
9.50
(0.374)
WSIRT-25
AS52762
AS52792
0.3095-24
UNS-3A
0.3095
0.3023
0.2824
0.2796
9.53
(0.375)
12.50
(0.492)
WSIRT-31
AS52763
AS52793
0.3720-24
UNS-3A
0.3720
0.3648
0.3449
0.3420
11.00
(0.433)
14.50
(0.570)
WSIRT-37

U760329
0.4345-20
UNS-3A
0.4345
0.4264
0.4020
0.3989
12.73
(0.501)
16.00
(0.629)
WSIRT-43

U760330
0.4970-20
UNS-3A
0.4970
0.4889
0.4645
0.4613
14.25
(0.561)
18.50
(0.728)
WSIRT-50
[Rev.10 from 2021] 2026.04.01 13:01:17 UTC
"Aviabrain" 2025