DOC AIRBUS | AMM A320FReplacement and Repair of EGT, T2.6 and T3 Electrical Harness Terminal Lug [IAE]
TASK 70-71-25-960-801-A
Replacement and Repair of EGT, T2.6 and T3 Electrical Harness Terminal Lug
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 70-71-25-941-050-A ** ON A/C NOT FOR ALL
Subtask 70-71-25-960-052-A ** ON A/C NOT FOR ALL
Subtask 70-71-25-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:20:02 UTC
Replacement and Repair of EGT, T2.6 and T3 Electrical Harness Terminal Lug
ZONE: 400
1. Reason for the Job- This chapter gives the procedure for the replacement of a connector contact (pin or socket) on a cable assembly. Refer to AWL and IPC for the connector, backshell part numbers and for the pin number equipment list. Refer to Chapter 70-71-12 for the connector contact/insert arrangement.
- Standard equipment and consumable material can be replaced with equivalent items.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | CRIMPING TOOL 25-3085 |
| No specific | 2 | CRIMPING TOOL AMP 46988 |
| No specific | 2 | MULTIMETER MODEL 160B |
| No specific | 2 | OHMMETER MODEL 260 |
| No specific | 1 | SLEEVE - SHRINKING |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 71-13-00-410-010-A | Closing of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-30-00-440-012-A | Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
| TASK 78-32-00-410-010-A | Closing of the Thrust Reverser Halves |
Subtask 70-71-25-941-050-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
Subtask 70-71-25-010-050-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
Subtask 70-71-25-040-050-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
C. Deactivate the thrust reverser.
Subtask 70-71-25-010-051-A ** ON A/C NOT FOR ALL WARNING:
MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012). D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 70-71-25-960-052-A ** ON A/C NOT FOR ALL
A. Procedure
(1) Remove the damaged harness terminal lug.
(2) Open the grip portion of the termination band sufficiently to permit axial movement in the wire. Remove the fiberglass sleeve until the weld piece comes into view.
(3) Opening of the crimped pieces of the damaged terminal lug.
(a) Open the crimped piece on the conductor.
(b) Open the crimped piece on the wire insulation.
(4) Carefully remove with a file the weld between the terminal lug and the wire sufficiently to permit the terminal lug to be removed.
(5) Make a selection of the appropriate terminal lug for replacement.
EGT, T2.6 and T3 Electrical Wire Harness Terminal Lugs (AL) and (CR) Positions ** ON A/C NOT FOR ALL
(a) Keep a minimum of 0.03 in. (0.76 mm) between the crimp barrel and the wire insulation.
(b) If necessary, cut the wire insulation sufficiently to keep the dimension.
(c) Crimp the terminal lug in place on the conductor. Use the CRIMPING TOOL 25-3085 or the CRIMPING TOOL AMP 46988.
1 Crimp one crimp piece over the conductor.
2 Crimp one crimp piece over the wire insulation.
(6) Move the fiberglass sleeve over the terminal-lug crimp pieces until the crimp is not shown.
(7) Crimp the grip piece of the termination band over the wire.
(8) Do a continuity test on the repaired circuit from the terminal lug to the connector contact. Use the MULTIMETER MODEL 160B or the OHMMETER MODEL 260 or equivalent.
(a) Each circuit must have continuity from one end of the wire to the other end of the wire.
Subtask 70-71-25-960-053-A ** ON A/C NOT FOR ALL (1) Remove the damaged harness terminal lug.
(2) Open the grip portion of the termination band sufficiently to permit axial movement in the wire. Remove the fiberglass sleeve until the weld piece comes into view.
(3) Opening of the crimped pieces of the damaged terminal lug.
(a) Open the crimped piece on the conductor.
(b) Open the crimped piece on the wire insulation.
(4) Carefully remove with a file the weld between the terminal lug and the wire sufficiently to permit the terminal lug to be removed.
(5) Make a selection of the appropriate terminal lug for replacement.
EGT, T2.6 and T3 Electrical Wire Harness Terminal Lugs (AL) and (CR) Positions ** ON A/C NOT FOR ALL (b) If necessary, cut the wire insulation sufficiently to keep the dimension.
(c) Crimp the terminal lug in place on the conductor. Use the CRIMPING TOOL 25-3085 or the CRIMPING TOOL AMP 46988.
1 Crimp one crimp piece over the conductor.
2 Crimp one crimp piece over the wire insulation.
(6) Move the fiberglass sleeve over the terminal-lug crimp pieces until the crimp is not shown.
(7) Crimp the grip piece of the termination band over the wire.
(8) Do a continuity test on the repaired circuit from the terminal lug to the connector contact. Use the MULTIMETER MODEL 160B or the OHMMETER MODEL 260 or equivalent.
(a) Each circuit must have continuity from one end of the wire to the other end of the wire.
NOTE: A permanent repair on the termination assembly must be made at a repair facility. The termination branch wire must have sufficient length to keep the tolerances shown in the applicable component maintenance manual. You can remove the crimped lug and install a new permanent lug. All four thermocouple terminals in the termination branch must be replaced to keep the same length in the branch. You must move the termination band as necessary to keep the dimensions. If the termination branch wire length is not sufficient, the harness or the termination assembly must be replaced.
B. Replacement of the Damaged T2.6 Electrical-Harness Terminal Lugs
(1) Remove the damaged harness terminal lug.
(2) Carefully remove the heat shrink sleeve until the welded piece comes into view.
(3) Opening of the crimped pieces of the damaged terminal lug.
(a) Open the crimped piece on the conductor.
(b) Open the crimped piece on the wire insulation.
(4) Carefully remove with a file the weld between the terminal lug and the wire sufficiently to permit the terminal to be removed.
(5) Make a selection of the appropriate terminal lug for replacement.
EGT, T2.6 and T3 Electrical Wire Harness Terminal Lugs (AL) and (CR) Positions ** ON A/C NOT FOR ALL
(a) Move the terminal lug in place on the wire.
(b) Keep a minimum of 0.03 in. (0.76 mm) between the crimp barrel and the wire insulation.
(c) If necessary, cut the wire insulation sufficiently to maintain the dimension.
(d) Crimp the terminal lug in place. Use a CRIMPING TOOL 25-3085 or CRIMPING TOOL AMP 46988.
1 Crimp one crimp piece over the conductor.
Subtask 70-71-25-750-051-A ** ON A/C NOT FOR ALL (1) Remove the damaged harness terminal lug.
(2) Carefully remove the heat shrink sleeve until the welded piece comes into view.
(3) Opening of the crimped pieces of the damaged terminal lug.
(a) Open the crimped piece on the conductor.
(b) Open the crimped piece on the wire insulation.
(4) Carefully remove with a file the weld between the terminal lug and the wire sufficiently to permit the terminal to be removed.
(5) Make a selection of the appropriate terminal lug for replacement.
EGT, T2.6 and T3 Electrical Wire Harness Terminal Lugs (AL) and (CR) Positions ** ON A/C NOT FOR ALL (b) Keep a minimum of 0.03 in. (0.76 mm) between the crimp barrel and the wire insulation.
(c) If necessary, cut the wire insulation sufficiently to maintain the dimension.
(d) Crimp the terminal lug in place. Use a CRIMPING TOOL 25-3085 or CRIMPING TOOL AMP 46988.
1 Crimp one crimp piece over the conductor.
WARNING:
DO NOT USE ANY HEAT GUN IF THERE ARE FUEL OF FUEL VAPORS AS DETERMINED BY A COMBUSTIBLE INDICATOR. HEAT GUNS ARE A SOURCE OF COMBUSTION. FUEL OR FUEL VAPORS CAN CAUSE INURY OR DEATH TO THE PERSON. DO NOT USE ANY HEAT GUN ON AN AIRPLANE WHEN PASSENGERS ARE ABOARD, WHEN THE AIRPLANE IS IN THE AIRPORT TERMINAL AREA OR IN A HANGAR.
DO NOT BREATHE THE FUMES RELEASED FROM THE HEAT SHRINK SLEEVE WHEN YOU DO THE SHRINKING PROCESS. THE FUMES CAN CAUSE INJURY TO THE PERSON.
USE SUFFICIENT VENTILATION TO REMOVE FUMES RELEASED FROM THE HEAT SHRINK SLEEVE AND TO KEEP THE ENGINE COMPARTMENT AND SURROUNDING AREA FREE OF FUEL VAPORS.
2 Crimp one crimp piece over the wire insulation. C. Fuel Vapor Test
(1) Do a fuel vapor test and use a combustible gas indicator Model D-16, Model M-6, Model 2A or Model 40.
Subtask 70-71-25-760-050-A ** ON A/C NOT FOR ALL (1) Do a fuel vapor test and use a combustible gas indicator Model D-16, Model M-6, Model 2A or Model 40.
D. Insulation of the Terminal Lug
(2) Do the procedure in step (4) when you insulate and support the terminal lug with the heat shrink sleeve.
(3) Wrap one layer of P/N No. 92 insulation tape around the terminal lug and make a 20 percent overlap on each wrap of the tape. Extend the tape to 0.50 in. (12.70 mm) on to the metal braid.
(4) Heat shrink the sleeve on the crimped terminal lug. Use the Heat Tool (Compressed Air and Nitrogen) HT900B or HT920B as follows:
(a) Cut a piece of SLEEVE - SHRINKING to the correct length and install the sleeve on the wire.
(b) Move the heat shrink sleeve over the crimped part of the terminal lug.
(c) Attach the heat reflector to the heating tool.
(d) Make the contour of the heat reflector to be 1 in. (25.40 mm) between the reflector and the heat shrink sleeve.
(e) Use protection on all wires and other items than can be damaged by heat with applicable heat shields.
(f) Apply heat to the tool for one minute before you shrink the sleeve.
(g) Apply heat to the sleeve and shrink the sleeve into place. Do not apply heat to the sleeve for more than 20 seconds at any one location.
(h) If the sleeve did not properly shrink in place after 20 seconds, decrease the temperature and shrink the sleeve as follows.
Subtask 70-71-25-720-051-A ** ON A/C NOT FOR ALL - The terminal lug can be insulated when you use the tape wrap or heat shrink sleeve.
(2) Do the procedure in step (4) when you insulate and support the terminal lug with the heat shrink sleeve.
(3) Wrap one layer of P/N No. 92 insulation tape around the terminal lug and make a 20 percent overlap on each wrap of the tape. Extend the tape to 0.50 in. (12.70 mm) on to the metal braid.
(4) Heat shrink the sleeve on the crimped terminal lug. Use the Heat Tool (Compressed Air and Nitrogen) HT900B or HT920B as follows:
(a) Cut a piece of SLEEVE - SHRINKING to the correct length and install the sleeve on the wire.
(b) Move the heat shrink sleeve over the crimped part of the terminal lug.
(c) Attach the heat reflector to the heating tool.
(d) Make the contour of the heat reflector to be 1 in. (25.40 mm) between the reflector and the heat shrink sleeve.
(e) Use protection on all wires and other items than can be damaged by heat with applicable heat shields.
(f) Apply heat to the tool for one minute before you shrink the sleeve.
(g) Apply heat to the sleeve and shrink the sleeve into place. Do not apply heat to the sleeve for more than 20 seconds at any one location.
(h) If the sleeve did not properly shrink in place after 20 seconds, decrease the temperature and shrink the sleeve as follows.
- Decrease the temperature of the wire assembly for a minimum of five minutes.
- Apply heat to the sleeve for a maximum of 20 seconds.
E. Testing of the Repaired Circuit
Do a continuity test on the repaired circuit from the terminal lug to the connector contact. Use a MULTIMETER MODEL 160B or a OHMMETER MODEL 260, or equivalent.
(1) Each circuit must have continuity from one end of the wire to the other end of the wire.
5. Close-upDo a continuity test on the repaired circuit from the terminal lug to the connector contact. Use a MULTIMETER MODEL 160B or a OHMMETER MODEL 260, or equivalent.
(1) Each circuit must have continuity from one end of the wire to the other end of the wire.
NOTE: A permanent repair on the termination assembly must be made at a repair facility. The termination branch wire must have sufficient length to keep the tolerances specified in the applicable component maintenance manual. You can remove the crimped lug and install a new permanent lug. All four thermocouple terminals in the termination branch must be replaced to keep the same length in the branch. You must move the termination band as necessary to keep the dimensions. If the termination branch wire length is not sufficient, the harness of the termination assembly must be replaced.
Subtask 70-71-25-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.
Subtask 70-71-25-440-050-A ** ON A/C NOT FOR ALL Subtask 70-71-25-410-051-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.