DOC AIRBUS | AMM A320FInstallation of the Wiring Harnesses [PW11]
TASK 70-70-00-910-802-A
Installation of the Wiring Harnesses
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 70-70-00-860-052-A ** ON A/C NOT FOR ALL
Subtask 70-70-00-910-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:20:45 UTC
Installation of the Wiring Harnesses
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | PLIERS - JAWED, SOFT |
| No specific | 1 | WRENCH - STRAP |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-70-00-910-803-A | SPOP 6 - Cleaning of the Contact Points and Wiring Harnesses |
Subtask 70-70-00-860-052-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 70-70-00-910-052-A ** ON A/C NOT FOR ALL
A. Procedure
(2) Examine each harness electrical connector and the mating component receptacle as follows:
(a) Look for broken, bent or corroded pins.
(b) Look for arcing between the pins or sockets.
(c) Examine the threads.
(d) Examine the backshells and backshell clamps for damage and tightness.
(3) Clean the electrical harness connectors and the contacts (Ref. AMM TASK 70-70-00-910-803).
(4) Examine the harness wires for cracks, wear or breaks.
(5) Install the wiring harness assembly as follows:
1 Start at the top, continue to work down and around the engine, and put the harness in position on any hinge clamps, block clamps or brackets as applicable.
2 Do not twist the harness.
3 Do not close or tighten any clamps at this time.
(6) Connect the self-locking (MIL-C-26500 or MIL-C-38999) harness electrical connectors to the mating components as follows:
(b) Push lightly inward on the connector while tightening the coupling ring.
(c) Use PLIERS - JAWED, SOFT or a WRENCH - STRAP and tighten the connector against the receptacle.
(d) While you tighten, push the connector in and from side to side.
(e) Make sure that you can feel the ratchet feature.
(f) Tighten the connector until the pliers or strap wrench slip on the connector ring.
(g) Make sure that you cannot tighten the connector more.
(b) Push lightly inward on the connector while tightening the coupling ring.
(c) Use PLIERS - JAWED, SOFT or a WRENCH - STRAP and tighten the connector against the receptacle.
(d) While you tighten, push the connector in and from side to side.
(e) Tighten the connector until the pliers or strap wrench slip on the connector ring.
(f) Make sure that you cannot tighten the connector more.
(h) If necessary, safety the connector coupling ring.
(8) Attach the harness to the engine as follows:
(a) Adjust the harness in the hinged clamps, loop clamps and block clamps to remove any stress (too loose or too tight) and make sure that there is a sufficient clearance with the adjacent hardware.
(b) Distribute the slack in the harness equally.
(c) Make a large radius where the harness changes direction.
(d) Attach the harness to the engine with the applicable hinged clamps, loop clamps, and block clamps as applicable.
(e) Torque the clamp bolts.
(9) Examine the assembly for foreign objects, damage and correct assembly.
NOTE: Always obey the specific procedures and limits in the specific maintenance manual maintenance tasks.
(1) Removal of the protection covers CAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine. (2) Examine each harness electrical connector and the mating component receptacle as follows:
(a) Look for broken, bent or corroded pins.
(b) Look for arcing between the pins or sockets.
(c) Examine the threads.
(d) Examine the backshells and backshell clamps for damage and tightness.
(3) Clean the electrical harness connectors and the contacts (Ref. AMM TASK 70-70-00-910-803).
(4) Examine the harness wires for cracks, wear or breaks.
(5) Install the wiring harness assembly as follows:
CAUTION:
DO NOT BEND OR TWIST THE HARNESS TOO MUCH. IF YOU DO, DAMAGE TO THE HARNESS CAN OCCUR.
CAUTION:
DO NOT TIGHTEN THE CLAMPS UNTIL YOU CONNECT ALL ELECTRICAL CONNECTORS AND THE HARNESS IS IN THE CORRECT POSITION. IF YOU DO NOT DO THIS, DAMAGE TO THE HARNESS CAN OCCUR.
CAUTION:
DO NOT LET THE WEIGHT OF THE HARNESS HANG ON THE ELECTRICAL CONNECTOR. IF YOU DO, YOU CAN CAUSE STRESS OR DAMAGE TO THE CONNECTOR OR HARNESS.
(a) Put the harness in position on the engine as follows: 1 Start at the top, continue to work down and around the engine, and put the harness in position on any hinge clamps, block clamps or brackets as applicable.
2 Do not twist the harness.
3 Do not close or tighten any clamps at this time.
(6) Connect the self-locking (MIL-C-26500 or MIL-C-38999) harness electrical connectors to the mating components as follows:
CAUTION:
USE THE CORRECT ASSEMBLY PROCEDURE AND TOOLS WHEN YOU INSTALL THE HARNESS CONNECTOR. IF YOU DO NOT, THE CONNECTOR CAN BECOME LOOSE OR DAMAGED. A LOOSE CONNECTOR CAN CAUSE THE ENGINE TO OPERATE INCORRECTLY, WITH THE RISK OF LIGHTNING AND AN INFLIGHT SHUTDOWN.
(a) Examine, align and engage the connector. (b) Push lightly inward on the connector while tightening the coupling ring.
(c) Use PLIERS - JAWED, SOFT or a WRENCH - STRAP and tighten the connector against the receptacle.
(d) While you tighten, push the connector in and from side to side.
(e) Make sure that you can feel the ratchet feature.
(f) Tighten the connector until the pliers or strap wrench slip on the connector ring.
(g) Make sure that you cannot tighten the connector more.
NOTE: When you use these tools correctly, the contacts are sufficiently engaged and the connector is tight. If you use too much force, these tools will turn on the connector coupling nut. (This is to protect the connector from too much torque.)
(7) Connect other types of harness electrical connectors to the mating components as follows: CAUTION:
USE THE CORRECT ASSEMBLY PROCEDURE AND TOOLS WHEN YOU INSTALL THE HARNESS CONNECTOR. IF YOU DO NOT, THE CONNECTOR CAN BECOME LOOSE OR DAMAGED. A LOOSE CONNECTOR CAN CAUSE THE ENGINE TO OPERATE INCORRECTLY, WITH THE RISK OF LIGHTNING AND AN INFLIGHT SHUTDOWN.
(a) Examine, align and engage the connector. (b) Push lightly inward on the connector while tightening the coupling ring.
(c) Use PLIERS - JAWED, SOFT or a WRENCH - STRAP and tighten the connector against the receptacle.
(d) While you tighten, push the connector in and from side to side.
(e) Tighten the connector until the pliers or strap wrench slip on the connector ring.
(f) Make sure that you cannot tighten the connector more.
NOTE: When you use these tools correctly, the contacts are sufficiently engaged and the connector is tight. If you use too much force, these tools will turn on the connector coupling nut. (This is to protect the connector from too much torque.)
(g) If necessary, torque the connector as specified in the specific maintenance manual maintenance task. (h) If necessary, safety the connector coupling ring.
(8) Attach the harness to the engine as follows:
(a) Adjust the harness in the hinged clamps, loop clamps and block clamps to remove any stress (too loose or too tight) and make sure that there is a sufficient clearance with the adjacent hardware.
(b) Distribute the slack in the harness equally.
(c) Make a large radius where the harness changes direction.
(d) Attach the harness to the engine with the applicable hinged clamps, loop clamps, and block clamps as applicable.
(e) Torque the clamp bolts.
(9) Examine the assembly for foreign objects, damage and correct assembly.