DOC AIRBUS | AMM A320FInstallation of the Exhaust Gas Temperature (EGT) Harness and Junction Box (PRE SB 77-0015 and POST SB 77-0015) [IAE]
TASK 77-21-43-400-010-B
Installation of the Exhaust Gas Temperature (EGT) Harness and Junction Box (PRE SB 77-0015 and POST SB 77-0015)
Self explanatory
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 77-21-43-860-051-A ** ON A/C NOT FOR ALL
Subtask 77-21-43-420-051-A ** ON A/C NOT FOR ALL
Subtask 77-21-43-410-052-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:18:17 UTC
Installation of the Exhaust Gas Temperature (EGT) Harness and Junction Box (PRE SB 77-0015 and POST SB 77-0015)
WARNING:
DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.
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.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V02-127) | lockwire |
| (Material No.V10-077) | approved engine oils |
| 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 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 70-30-00-918-010-A | Consumable Materials Index |
| TASK 71-00-00-710-012-B | Test No.3 : Idle Leak Check |
| 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 73-22-00-710-040-A | Operational Test of the FADEC SYSTEM on the Ground |
| TASK 77-21-43-400-804-B | Installation of the Core EGT Harness |
| 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 |
| TASK 70-71-01-00-13 | GENERAL - POWER PLANT - DESCRIPTION AND OPERATION |
Subtask 77-21-43-860-051-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 77-21-43-010-056-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 77-21-43-040-053-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
C. Make sure that the thrust-reverser Hydraulic Control Unit (HCU) is deactivated: (Ref. AMM TASK 78-30-00-040-012)
4. ProcedureSubtask 77-21-43-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the EGT Harness and Junction Box
PRE SBE 77-0015
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL
(a) Install the EGT harness and the junction box (118) to the bracket (124) on the turbine exhaust case.
(b) Apply approved engine oils (Material No.V10-077) or equivalent (Ref. AMM TASK 70-30-00-918-010) to the threads of the bolts (119).
(c) Install the bolts (119) and the nuts (117) which hold the EGT harness and junction box to the bracket.
(d) TORQUE the bolts (119) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013).
(2) Attach the harness lugs to the thermocouples.
(b) Attach the harness lugs to the thermocouples.
(d) Tightening of the nuts.
(Ref. AMM TASK 70-23-11-911-013).
2 TORQUE the chromel (smaller) nuts (100) to between 18 and 15 lbf.in (0.20 and 0.17 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
PRE SB 77-0009
(3) Install the EGT core harness to the junction box (PRE SB 77-0009).
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL
(a) Remove the nuts (122) on the junction box connections.
(b) Install the core EGT wiring harness (123) to the junction box.
(d) TORQUE the larger nuts (alumel) to between 32 and 18 lbf.in (0.36 and 0.20 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(e) TORQUE the smaller nuts (chromel) to between 18 and 15 lbf.in (0.20 and 0.17 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(f) Install the junction box cover (121) and secure it with the four screws (120).
(g) TORQUE the screws (120) to between 22 and 16 lbf.in (0.25 and 0.18 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
End of PRE SB 77-0009
POST SB 77-0009
(4) Install the EGT core harness to the junction box.
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL
(a) Remove the nuts (122) on the junction box connections.
(b) Install the engine harness (123) to the junction box.
(d) TORQUE the larger nuts (alumel) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(e) TORQUE the smaller nuts (chromel) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(f) Install the junction box cover (121) and secure it with the four screws (120).
(g) TORQUE the screws (120) to between 22 and 16 lbf.in (0.25 and 0.18 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
End of POST SB 77-0009
(6) Attach the harness clamps to the flange brackets.
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL
(a) Install the harness clamps to the brackets (105), (113), (126) and (129) on Flange P on the left and the right sides of the engine.
(b) Attach the clamps with the bolts (106), (112), (128) and (127) and the nuts (104), (114), (125) and (130).
(c) Install the harness clamps to the bracket (116) on the boss of the case at the 6 o'clock position and attach them with the bolts (115).
(d) Install the harness clamps to the brackets (108) on Flange T on the lower portion of the exhaust case and attach them with the nuts (107).
(e) Attach the two clamps at the 4 o'clock and the 8 o'clock locations on the harness to the clamps (111) on the P4.9 manifold and attach them with the bolts (110) and the nuts (109).
(f) TORQUE all the harness clamp bolts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
END OF PRE SBE 77-0015
Subtask 77-21-43-420-063-A ** ON A/C NOT FOR ALL PRE SBE 77-0015
NOTE: For more information about the minimum clearance allowed (Ref. AMM D/O 70-71-01-00).
(1) Install the EGT harness and junction box. EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL (b) Apply approved engine oils (Material No.V10-077) or equivalent (Ref. AMM TASK 70-30-00-918-010) to the threads of the bolts (119).
(c) Install the bolts (119) and the nuts (117) which hold the EGT harness and junction box to the bracket.
(d) TORQUE the bolts (119) to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (2) Attach the harness lugs to the thermocouples.
CAUTION:
YOU MUST MAKE SURE THAT THE TERMINAL LUG IS ALIGNED AND DOES NOT TOUCH THE INNER SURFACE OF THE COWL WHEN IT IS TIGHTENED TO PREVENT THE EGT HARNESS FROM BEING WORN-OUT WITH THE COWL.
(a) Remove the four nuts, two of each (100) and (102) and the washers, two of each (101) and (103) from the thermocouples (at four locations). (b) Attach the harness lugs to the thermocouples.
CAUTION:
DO NOT USE LUBRICATION ON THREADS OF THERMOCOUPLE CONNECTIONS. ENGINE OIL CAN CONTAMINATE EGT HARNESS INSULATION MATERIAL AND RESULT IN ERRATIC OR UNRELIABLE EGT INDICATION.
(c) Install the four washers, two of each (101) and (103) and the four nuts, two of each (100) and (102).(d) Tightening of the nuts.
CAUTION:
DO NOT TIGHTEN NUTS MORE THAN MAXIMUM TORQUE. TOO MUCH TORQUE CAN DAMAGE THE THERMOCOUPLE STUDS AND RESULT IN ERRATIC OR UNRELIABLE EGT INDICATION.
1 TORQUE the alumel (larger) nuts (102) to between 22 and 18 lbf.in (0.25 and 0.20 m.daN ) (Ref. AMM TASK 70-23-11-911-013). 2 TORQUE the chromel (smaller) nuts (100) to between 18 and 15 lbf.in (0.20 and 0.17 m.daN )
(Ref. AMM TASK 70-23-11-911-013). PRE SB 77-0009
(3) Install the EGT core harness to the junction box (PRE SB 77-0009).
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL (b) Install the core EGT wiring harness (123) to the junction box.
CAUTION:
DO NOT USE LUBRICATION ON THREADS OF THERMOCOUPLE CONNECTIONS. ENGINE OIL CAN CONTAMINATE EGT HARNESS INSULATION MATERIAL AND RESULT IN ERRATIC OR UNRELIABLE EGT INDICATION.
(c) Install the nuts to the junction box connections.(d) TORQUE the larger nuts (alumel) to between 32 and 18 lbf.in (0.36 and 0.20 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (e) TORQUE the smaller nuts (chromel) to between 18 and 15 lbf.in (0.20 and 0.17 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (f) Install the junction box cover (121) and secure it with the four screws (120).
(g) TORQUE the screws (120) to between 22 and 16 lbf.in (0.25 and 0.18 m.daN )
(Ref. AMM TASK 70-23-11-911-013). End of PRE SB 77-0009
POST SB 77-0009
(4) Install the EGT core harness to the junction box.
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL (b) Install the engine harness (123) to the junction box.
CAUTION:
DO NOT USE LUBRICATION ON THREADS OF THERMOCOUPLE CONNECTIONS. ENGINE OIL CAN CONTAMINATE EGT HARNESS INSULATION MATERIAL AND RESULT IN ERRATIC OR UNRELIABLE EGT INDICATION.
CAUTION:
ONCE A NEW STYLE NUT IS INSTALLED ONTO THE MATING STUD, YOU MUST NOT INSTALL AN OLD NUT ON THAT STUD.
(c) Install the nuts to the junction box connections.(d) TORQUE the larger nuts (alumel) to between 30 and 25 lbf.in (0.34 and 0.28 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (e) TORQUE the smaller nuts (chromel) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (f) Install the junction box cover (121) and secure it with the four screws (120).
(g) TORQUE the screws (120) to between 22 and 16 lbf.in (0.25 and 0.18 m.daN )
(Ref. AMM TASK 70-23-11-911-013). End of POST SB 77-0009
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(5) Safety the screws (120) with lockwire (Material No.V02-127) . (6) Attach the harness clamps to the flange brackets.
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL (b) Attach the clamps with the bolts (106), (112), (128) and (127) and the nuts (104), (114), (125) and (130).
(c) Install the harness clamps to the bracket (116) on the boss of the case at the 6 o'clock position and attach them with the bolts (115).
(d) Install the harness clamps to the brackets (108) on Flange T on the lower portion of the exhaust case and attach them with the nuts (107).
(e) Attach the two clamps at the 4 o'clock and the 8 o'clock locations on the harness to the clamps (111) on the P4.9 manifold and attach them with the bolts (110) and the nuts (109).
(f) TORQUE all the harness clamp bolts to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
(Ref. AMM TASK 70-23-11-911-013). END OF PRE SBE 77-0015
B. Installation of the Core EGT Harness on the High Pressure Compressor (HPC)
PRE SBE 77-0015
(1) Connect the core EGT harness to the junction box.
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL
(a) Remove the nuts from the junction box terminals.
(b) Install the harness lugs to the junction box terminals.
(c) Attach the core EGT harness to the junction box terminals and install the four nuts (122).
(2) Install the bolts, the washers and the nuts at three clip positions 5523, 6055 and 5734 (Ref. AMM TASK 77-21-43-400-804).
(3) Install the bolts, the washers, the clamps and the nuts at ten clip positions 5551, 5211, 5529, 5550, 5527, 5549, 6052, 6051, 6053 and 6054 (Ref. AMM TASK 77-21-43-400-804).
(4) Install the four clips to the positions 6086, 6085, 5553 and 5552 (Ref. AMM TASK 77-21-43-400-804).
(5) Install the electrical connector 4007VC-A to the electrical receptacle 4007VC (Ref. AMM TASK 77-21-43-400-804).
END OF PRE SBE 77-0015
Subtask 77-21-43-942-051-A ** ON A/C NOT FOR ALL PRE SBE 77-0015
(1) Connect the core EGT harness to the junction box.
EGT Harness at the Flange T and the Flange P Bracket Locations (PRE SBE 77-0015) ** ON A/C NOT FOR ALL (b) Install the harness lugs to the junction box terminals.
(c) Attach the core EGT harness to the junction box terminals and install the four nuts (122).
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(d) Install the screws (120) to attach the junction box cover (121) and safety with lockwire (Material No.V02-127) .(2) Install the bolts, the washers and the nuts at three clip positions 5523, 6055 and 5734 (Ref. AMM TASK 77-21-43-400-804).
(3) Install the bolts, the washers, the clamps and the nuts at ten clip positions 5551, 5211, 5529, 5550, 5527, 5549, 6052, 6051, 6053 and 6054 (Ref. AMM TASK 77-21-43-400-804).
(4) Install the four clips to the positions 6086, 6085, 5553 and 5552 (Ref. AMM TASK 77-21-43-400-804).
(5) Install the electrical connector 4007VC-A to the electrical receptacle 4007VC (Ref. AMM TASK 77-21-43-400-804).
END OF PRE SBE 77-0015
C. Remove the WARNING NOTICE(S).
Subtask 77-21-43-720-053-A ** ON A/C NOT FOR ALL D. Test requirements:
(1) Do an operational test of the FADEC (Ref. AMM TASK 73-22-00-710-040) and a check on CFDS to make sure no fault is shown related to the EGT harness.
(2) Do an idle leak check (Ref. AMM TASK 71-00-00-710-012).
(3) On the upper ECAM DU, make sure that the EGT indication is available.
5. Close-up(1) Do an operational test of the FADEC (Ref. AMM TASK 73-22-00-710-040) and a check on CFDS to make sure no fault is shown related to the EGT harness.
(2) Do an idle leak check (Ref. AMM TASK 71-00-00-710-012).
(3) On the upper ECAM DU, make sure that the EGT indication is available.
Subtask 77-21-43-410-052-A ** ON A/C NOT FOR ALL
A. Close Access
(1) 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 77-21-43-440-055-A ** ON A/C NOT FOR ALL Subtask 77-21-43-410-062-A ** ON A/C NOT FOR ALL (1) 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.