DOC AIRBUS | AMM A320FGeneral Instructions for Uses of Safety Cable [IAE]
TASK 70-40-11-911-016-A
General Instructions for Uses of Safety Cable
Self explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
B. Referenced Information
3. Job Set-up
Subtask 70-40-11-941-050-A ** ON A/C NOT FOR ALL
Subtask 70-40-11-911-055-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:53:59 UTC
General Instructions for Uses of Safety Cable
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-40-11-911-016-A | General Instructions for Uses of Safety Cable |
Examples of Safety Cable MethodsSubtask 70-40-11-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
Subtask 70-40-11-869-054-A ** ON A/C NOT FOR ALL B. General
(1) Safety cable is permitted at limited locations as an alternative to lockwire/safety wire. It is permitted to use safety cable per (Ref. AMM TASK 70-40-11-911-016) as an alternative to lockwire/safety wire as specified below.
(a) At all external and fan stream locations where the safety wire hole is sufficiently large for the cable, it is permitted to use only Safety Cable Part No AS3510-0218C ( 0.032 IN. (0.813 MM) diameter) and safety cable ferrule Part No AS3510-02F.
(b) Safety cable is not permitted at the subsequent locations:
1 Locations where the safety wire hole is more than 0.100 IN. (2.540 MM) diameter (the safety cable ferrule will pull through a hole larger than this)
2 Internal areas of the engine
3 Internal areas of gearboxes
4 Internal areas of accessories
5 Heat shields (as lacing)
6 Vendor-controlled (Category 1) components.
(2) If the Engine Manual specifies that it is permitted to use lockwire as an alternative to safety cable, use the applicable alternative:
(a) Where it is permitted to use lockwire as an alternative to 0.020 IN. (0.508 MM) diameter safety cable, the permitted lockwire is SAE Aerospace Standard AS3214-01 lockwire.
(b) Where it is permitted to use lockwire as an alternative to 0.032 IN. (0.813 MM) diameter safety cable, the permitted lockwire is SAE Aerospace Standard AS3214-02 lockwire.
(c) Where it is permitted to use lockwire as an alternative to 0.040 IN. (1.016 MM) diameter safety cable, the permitted lockwire is SAE Aerospace Standard AS3214-03 lockwire.
(3) The instructions that follow are safety cable installation instruction procedures for fasteners such as bolts, screws, tube coupling nuts, hose connectors, electrical connectors.
4. Procedure(1) Safety cable is permitted at limited locations as an alternative to lockwire/safety wire. It is permitted to use safety cable per (Ref. AMM TASK 70-40-11-911-016) as an alternative to lockwire/safety wire as specified below.
(a) At all external and fan stream locations where the safety wire hole is sufficiently large for the cable, it is permitted to use only Safety Cable Part No AS3510-0218C ( 0.032 IN. (0.813 MM) diameter) and safety cable ferrule Part No AS3510-02F.
(b) Safety cable is not permitted at the subsequent locations:
1 Locations where the safety wire hole is more than 0.100 IN. (2.540 MM) diameter (the safety cable ferrule will pull through a hole larger than this)
2 Internal areas of the engine
3 Internal areas of gearboxes
4 Internal areas of accessories
5 Heat shields (as lacing)
6 Vendor-controlled (Category 1) components.
(2) If the Engine Manual specifies that it is permitted to use lockwire as an alternative to safety cable, use the applicable alternative:
(a) Where it is permitted to use lockwire as an alternative to 0.020 IN. (0.508 MM) diameter safety cable, the permitted lockwire is SAE Aerospace Standard AS3214-01 lockwire.
(b) Where it is permitted to use lockwire as an alternative to 0.032 IN. (0.813 MM) diameter safety cable, the permitted lockwire is SAE Aerospace Standard AS3214-02 lockwire.
(c) Where it is permitted to use lockwire as an alternative to 0.040 IN. (1.016 MM) diameter safety cable, the permitted lockwire is SAE Aerospace Standard AS3214-03 lockwire.
(3) The instructions that follow are safety cable installation instruction procedures for fasteners such as bolts, screws, tube coupling nuts, hose connectors, electrical connectors.
Subtask 70-40-11-911-055-A ** ON A/C NOT FOR ALL
A. Safety Cable Installation
(1) Basic rules
1 The maximum span of safety cable between two and points is 6.0 in. (152,4 mm), unless specified differently by the assembly illustration.
(b) Installation defects
1 Nicks, kinks, fraying or any damage to the safety cable found before, during or subsequent to installation at or between and points is not permissible.
(c) Installation holes
(d) Permissible number of times to use the safety cable and ferrule :
1 The safety cable and its ferrule must be new for each application. It is not permissible to use the safety cable and ferrule again.
(e) Installation
1 Refer to
and
for ewamples of safety cable methods. Other methods are possible.
2 No more than three fasteners is secured with one cable.
3 Install safety cable in two or three bolt patterns, unless specified differently in the assembly procedure. The two bolt pattern is preferred when you apply safety cable to an even number of fasteners.
4 All possible combinations are not shown
,but every combination must follow the basic rules for safety cable.
(f) Pull-off load
1 The pull-off load is the force necessary to pull the cable out of either the ferrule or the cable end fitting.
2 Each safety cable installation tool is checked for pull-off load on a daily basis. This check can be extended up to a maximum of one month, when the user has obtained sufficient reliable experience on each tool.
(g) Crimp requirements (pull-off load)
1 Crimp the ferrule to the cable with one of the listed crimping tools.
2 The safety cable must meet the minimum crimp requirements.
(h) Cable size
1 The 0.8 mm (0.032 in.) diameter safety cable must be used for all fittings. Onlywhen the 0.8 mm (0.032 in.) will not fit, because the holes are smaller than thecable size, then the 0.5 mm (0.02 in.) safety cable is used.
(2) Installation
(a) Hole alignment
1 Do not decrease or increase the torque on the parts to correctly align the holes for the cable.
(b) Adjacent units
1 Install safety cable so that any tendency for a fasteners to loosen is counteracted by more tension on the cable.
2 It is recommended that there are no turns, more than 90 deg, when the cable goes through the fasteners. The result in the installation of safety cable with either a positive or negative pull.
(c) Cable flex limits
1 Cable installation tools will give the specified flex limits. The maximum ca ble flex limits between end points must be no greater than
when light finger pressure (approximately 2 pounds) is applied at mid-span.
(d) Excess cable
1 After installation of safety cable, cut off the excess cable from the crimped ferrule.
2 A maximum length of 0.031 in. (0.79 mm) is permissible to extend past the crimped ferrule.
(e) Procedure
1 Check the units to make sure that they have been correctly torqued. Under-torque or over-torque to obtain correct alignment of the holes is not permitted. If it is not possible to obtain correct alignment with the specified torque limit, back off the unit and try again or select another unit.
2 In adjacent units, it is desirable that the holes be in approximately the same relationship to each other.
3 Insert the end of the cable without the end fitting (ferrule) through the hole in the first part and pull the cable through unitil the end fitting is against the part. The safety cable shall be kept as straight as possible whilst being installed through parts.
4 Insert the end of the cable through the second part and pull it through.
If there is a third part to be safety cabled, pass the cable through this in the same manner.
5 Insert the free end of the cable through a ferrule in the ferrule magazine. Pull the safety cable through the ferrule and use the safety cable to pull out the ferrule from the magazine.
6 Insert the free end of the cable through the crimping tool making sure the large hole of the crimping head is on the same side as the ferrule.
7 Move the crimping tool along the cable until the crimping head is against the part. Ensure the ferrule is inside the hole in the crimping head.
8 If the ferrule will not go into the crimping head, remove the tool from the cable and then push the handles completely together. When the handless are released they will open automatically. Insert the cable back through the crimping head and move the tool along the cable until the crimping head is against the part. Ensure that the ferrule is inside the crimping head.
9 Place the cable into the tensioning device on the crimping tool and tension the cable.
11 Remove and discard the unused cable from the tensioning device.
12 Push against the safety cable with a light finger pressure half way between the components that have been wire locked. If the cable feels loose, a dimensional check should be carried out as follows to ensure that the cable is serviceable :
a Measure the distance between the safety cable parts, write this down as Dimension A. If three parts are safety cabled together, measure the distance between each of the parts (Dimensions D and E, and add the measurements together, i.e. D + E = A.
b Push against the safety cable with light finger pressure half way between two safety cabled parts. Measure the distance the safety cable moves laterally. Write this dimension down as dimension C.
c Compare the dimensions written down to the acceptable limits.
d If the safety cable is not within the acceptable limits given, cut and remove the installed cable then install a new safety cable.
(1) Basic rules
NOTE: Where safety cable is specified on the assembly illustrations, use the procedure that follows to install the cable.
(a) Maximum span 1 The maximum span of safety cable between two and points is 6.0 in. (152,4 mm), unless specified differently by the assembly illustration.
(b) Installation defects
1 Nicks, kinks, fraying or any damage to the safety cable found before, during or subsequent to installation at or between and points is not permissible.
(c) Installation holes
CAUTION:
DO NOT USE SAFETY CABLE IF THE HOLES ARE MORE THAN 0.100IN. (2,54 MM) DIAMETER. THE FERRULES ON THE ENDS OF THE CABLE ARE 0.106 TO 0.108IN. (2,693 TO 2,743 MM) DIAMETER AND WILL FALL THROUGH HOLES LARGER THAN THIS.
1 Always install safety cable through the safety cable holes given on the part. (d) Permissible number of times to use the safety cable and ferrule :
1 The safety cable and its ferrule must be new for each application. It is not permissible to use the safety cable and ferrule again.
(e) Installation
1 Refer to
and
for ewamples of safety cable methods. Other methods are possible.
2 No more than three fasteners is secured with one cable.
3 Install safety cable in two or three bolt patterns, unless specified differently in the assembly procedure. The two bolt pattern is preferred when you apply safety cable to an even number of fasteners.
4 All possible combinations are not shown
,but every combination must follow the basic rules for safety cable.
(f) Pull-off load
1 The pull-off load is the force necessary to pull the cable out of either the ferrule or the cable end fitting.
2 Each safety cable installation tool is checked for pull-off load on a daily basis. This check can be extended up to a maximum of one month, when the user has obtained sufficient reliable experience on each tool.
(g) Crimp requirements (pull-off load)
1 Crimp the ferrule to the cable with one of the listed crimping tools.
2 The safety cable must meet the minimum crimp requirements.
| Normal Wire Diameter Inch (mm) | Minimum Pull-off Load Inch-Pounds (Nm) |
|---|---|
| 0.020 (0.5) | 30 (3.39) |
| 0.032 (0.8) | 70 (7.91) |
1 The 0.8 mm (0.032 in.) diameter safety cable must be used for all fittings. Onlywhen the 0.8 mm (0.032 in.) will not fit, because the holes are smaller than thecable size, then the 0.5 mm (0.02 in.) safety cable is used.
(2) Installation
(a) Hole alignment
1 Do not decrease or increase the torque on the parts to correctly align the holes for the cable.
(b) Adjacent units
1 Install safety cable so that any tendency for a fasteners to loosen is counteracted by more tension on the cable.
2 It is recommended that there are no turns, more than 90 deg, when the cable goes through the fasteners. The result in the installation of safety cable with either a positive or negative pull.
(c) Cable flex limits
1 Cable installation tools will give the specified flex limits. The maximum ca ble flex limits between end points must be no greater than
when light finger pressure (approximately 2 pounds) is applied at mid-span.
(d) Excess cable
1 After installation of safety cable, cut off the excess cable from the crimped ferrule.
2 A maximum length of 0.031 in. (0.79 mm) is permissible to extend past the crimped ferrule.
(e) Procedure
1 Check the units to make sure that they have been correctly torqued. Under-torque or over-torque to obtain correct alignment of the holes is not permitted. If it is not possible to obtain correct alignment with the specified torque limit, back off the unit and try again or select another unit.
2 In adjacent units, it is desirable that the holes be in approximately the same relationship to each other.
3 Insert the end of the cable without the end fitting (ferrule) through the hole in the first part and pull the cable through unitil the end fitting is against the part. The safety cable shall be kept as straight as possible whilst being installed through parts.
4 Insert the end of the cable through the second part and pull it through.
If there is a third part to be safety cabled, pass the cable through this in the same manner.
5 Insert the free end of the cable through a ferrule in the ferrule magazine. Pull the safety cable through the ferrule and use the safety cable to pull out the ferrule from the magazine.
6 Insert the free end of the cable through the crimping tool making sure the large hole of the crimping head is on the same side as the ferrule.
7 Move the crimping tool along the cable until the crimping head is against the part. Ensure the ferrule is inside the hole in the crimping head.
8 If the ferrule will not go into the crimping head, remove the tool from the cable and then push the handles completely together. When the handless are released they will open automatically. Insert the cable back through the crimping head and move the tool along the cable until the crimping head is against the part. Ensure that the ferrule is inside the crimping head.
9 Place the cable into the tensioning device on the crimping tool and tension the cable.
CAUTION:
DO NOT CRIMP THE FERRULE UNLESS THE CORRECT TENSION HAS BEEN APPLIED BY THE TENSIONING DEVICE.
10 Crimp the ferrule and cut the cable in accordance with the manufacturers instructions. 11 Remove and discard the unused cable from the tensioning device.
12 Push against the safety cable with a light finger pressure half way between the components that have been wire locked. If the cable feels loose, a dimensional check should be carried out as follows to ensure that the cable is serviceable :
a Measure the distance between the safety cable parts, write this down as Dimension A. If three parts are safety cabled together, measure the distance between each of the parts (Dimensions D and E, and add the measurements together, i.e. D + E = A.
b Push against the safety cable with light finger pressure half way between two safety cabled parts. Measure the distance the safety cable moves laterally. Write this dimension down as dimension C.
c Compare the dimensions written down to the acceptable limits.
d If the safety cable is not within the acceptable limits given, cut and remove the installed cable then install a new safety cable.