DOC AIRBUS | AMM A320FRemoval of the Core EGT Harness [IAE]
TASK 77-21-43-000-804-B
Removal of the Core EGT Harness
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 77-21-43-941-057-A ** ON A/C NOT FOR ALL
Subtask 77-21-43-010-067-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:18:14 UTC
Removal of the Core EGT Harness
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.
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - BLANKING |
| No specific | AR | COVER - PROTECTION |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-010-A | Opening of the Fan Cowls 437AL(447AL),438AR(448AR) |
| TASK 77-21-43-000-010-B | Removal of the Exhaust Gas Temperature (EGT) Harness and Junction Box (PRE SB 77-0015 and POST SB 77-0015) |
| TASK 78-30-00-040-012-A | Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance |
| TASK 78-32-00-010-010-A | Opening of the Thrust Reverser Halves |
Core EGT HarnessSubtask 77-21-43-941-057-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) 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 overhead 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) to tell persons not to energize the FADEC 1(2).
Subtask 77-21-43-010-066-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) 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 overhead 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) 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 77-21-43-040-059-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
(2) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010).
4. ProcedureWARNING:
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). (2) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010).
Subtask 77-21-43-010-067-A ** ON A/C NOT FOR ALL
A. Removal of the Core EGT Harness
(1) Disconnect the core EGT harness from the thermocouple junction box (Ref. AMM TASK 77-21-43-000-010).
(2) Remove the bolt (1), the washer (2) and the nut (4) that attach the clip (3) to the lug on the tube 1 at position B.
(3) Make a note of position of the spacer (8). Remove the bolt (5), the washer (6), the spacer (8) and the nut (9) that attach the clip (7) to the lug on the tube 2 at position C.
(4) Make a note of the position of the spacers (13) and (15). Remove the bolt (10), the washer (11), the two spacers (13) and (15) and the nut (16) that attach the clips (12) and (14) to the lug on the tube 3 at position D.
(5) Make a note of position of the spacer (20). Remove the bolt (17), the washer (18), the spacer (20) and the nut (21) that attach the clip (19) to the lug on the tube 3 at position E.
PRE SBE 75-0049
(6) Remove the bolt (22), the washers (23) and (26), and the nut (27) that attach the clip (24) to the lug on the tube 4 and the clip (25) on the tube 2 at position F.
END OF PRE SBE 75-0049
SBE 75-0049
PRE SBE 79-0098
SBE 79-0098
(7) Make a note of the position of the spacer (28). Remove the bolt (22), the spacer (28) and the nut (27) that attach the clips (24) and (25) to the lug on the tube 4 at position F.
END OF SBE 75-0049
END OF PRE SBE 79-0098
END OF SBE 79-0098
PRE SBE 79-0098
SBE 79-0098
(8) Make a note of position of the spacer (32). Remove the bolt (29), the washer (30) and the spacer (32) that attach the clips (31) and (33) to the bracket (34) at position G.
END OF PRE SBE 79-0098
END OF SBE 79-0098
(9) Remove the bolt (36), the washer (37), and the nut (39) that attach the clip (38) to the lug on the tube 4 at position H.
(10) Remove the bolt (40) and the washer (41) that attach the clip (42) to the bracket (43) at position J.
PRE SBE 72-0189
(11) Remove the bolt (45) and the washer (46) that attach the clip (47) to the bracket (48) at position K.
(12) Remove the bolt (51), the washer (52) and the nut (54) that attach the clip (53) to the lug on the tube 5 at position L.
END OF PRE SBE 72-0189
SBE 72-0189
(13) Make a note of the position of the spacer (50). Remove the bolt (45) and the spacer (50) that attach the clip (47) to the bracket (48) at position K.
END OF SBE 72-0189
PRE SBE 79-0088
SBE 72-0189
(14) Remove the bolt (51) that attach the clip (53) to the lug on the tube 5 at position M.
(15) Make a note of the position of spacer (58). Remove the bolt (56), the spacer (58) and the nut (60) that attach the clips (57) and (59) to the lug on the tube 5 at position N.
END OF PRE SBE 79-0088
END OF SBE 72-0189
SBE 79-0088
(16) Remove the bolt (51) and the washer (97) that attach the clip (53) to the lug on the tube 5 at position M.
(17) Make a note of the position of the spacer (58). Remove the bolt (56), the spacer (58), the washer (61) and the nut (60) that attach the clip (59) to the lug on the tube 5 at position N.
END OF SBE 79-0088
(18) Remove the bolt (62), the washer (63) and the nut (65) that attach the clip (64) to the lug on the tube 1 at position P.
(19) Make a note of the position of the spacer (69). Remove the bolt (66), the washer (67) and the spacer (69) that attach the clips (68), (70) and (71) to the mounting brackets (72) and (73) at position Q.
(20) Remove the bolt (75), the washer (76) and the nut (78) that attach the clip (77) to the lug on the tube 7 at position R.
(21) Remove the bolt (79), the washer (80) and the nut (82) that attach the clip (81) to the lug on the tube 1 at position S.
(22) Make a note of the position of the spacer (86). Remove the bolt (83), the washer (84), the spacer (86) and the nut (88) that attach the clips (85) and (87) to the lug on the tube 7 at position T.
(23) Make a note of the position of the spacer (92). Remove the bolt (89), the washer (90), the spacer (92) and the nut (93) that attach the clip (91) to the lug on the tube 1 at position U.
(24) Disconnect the electrical connector 4007VC-A from the electrical receptacle 4007VC.
(25) Remove the four screws (95) and the four nuts (96) that attach the electrical receptacle 4007VC to the bracket (94) on flange FJ at position V.
SBE 79-0088
(26) Remove the four screws (95) and the four nuts (96) that attach the electrical receptacle 4007VC to the bracket (94) at position V.
END OF SBE 79-0088
(27) Remove the core EGT harness.
Subtask 77-21-43-620-051-A ** ON A/C NOT FOR ALL (1) Disconnect the core EGT harness from the thermocouple junction box (Ref. AMM TASK 77-21-43-000-010).
(2) Remove the bolt (1), the washer (2) and the nut (4) that attach the clip (3) to the lug on the tube 1 at position B.
(3) Make a note of position of the spacer (8). Remove the bolt (5), the washer (6), the spacer (8) and the nut (9) that attach the clip (7) to the lug on the tube 2 at position C.
(4) Make a note of the position of the spacers (13) and (15). Remove the bolt (10), the washer (11), the two spacers (13) and (15) and the nut (16) that attach the clips (12) and (14) to the lug on the tube 3 at position D.
(5) Make a note of position of the spacer (20). Remove the bolt (17), the washer (18), the spacer (20) and the nut (21) that attach the clip (19) to the lug on the tube 3 at position E.
PRE SBE 75-0049
(6) Remove the bolt (22), the washers (23) and (26), and the nut (27) that attach the clip (24) to the lug on the tube 4 and the clip (25) on the tube 2 at position F.
END OF PRE SBE 75-0049
SBE 75-0049
PRE SBE 79-0098
SBE 79-0098
(7) Make a note of the position of the spacer (28). Remove the bolt (22), the spacer (28) and the nut (27) that attach the clips (24) and (25) to the lug on the tube 4 at position F.
END OF SBE 75-0049
END OF PRE SBE 79-0098
END OF SBE 79-0098
PRE SBE 79-0098
SBE 79-0098
(8) Make a note of position of the spacer (32). Remove the bolt (29), the washer (30) and the spacer (32) that attach the clips (31) and (33) to the bracket (34) at position G.
END OF PRE SBE 79-0098
END OF SBE 79-0098
(9) Remove the bolt (36), the washer (37), and the nut (39) that attach the clip (38) to the lug on the tube 4 at position H.
(10) Remove the bolt (40) and the washer (41) that attach the clip (42) to the bracket (43) at position J.
PRE SBE 72-0189
(11) Remove the bolt (45) and the washer (46) that attach the clip (47) to the bracket (48) at position K.
(12) Remove the bolt (51), the washer (52) and the nut (54) that attach the clip (53) to the lug on the tube 5 at position L.
END OF PRE SBE 72-0189
SBE 72-0189
(13) Make a note of the position of the spacer (50). Remove the bolt (45) and the spacer (50) that attach the clip (47) to the bracket (48) at position K.
END OF SBE 72-0189
PRE SBE 79-0088
SBE 72-0189
(14) Remove the bolt (51) that attach the clip (53) to the lug on the tube 5 at position M.
(15) Make a note of the position of spacer (58). Remove the bolt (56), the spacer (58) and the nut (60) that attach the clips (57) and (59) to the lug on the tube 5 at position N.
END OF PRE SBE 79-0088
END OF SBE 72-0189
SBE 79-0088
(16) Remove the bolt (51) and the washer (97) that attach the clip (53) to the lug on the tube 5 at position M.
(17) Make a note of the position of the spacer (58). Remove the bolt (56), the spacer (58), the washer (61) and the nut (60) that attach the clip (59) to the lug on the tube 5 at position N.
END OF SBE 79-0088
(18) Remove the bolt (62), the washer (63) and the nut (65) that attach the clip (64) to the lug on the tube 1 at position P.
(19) Make a note of the position of the spacer (69). Remove the bolt (66), the washer (67) and the spacer (69) that attach the clips (68), (70) and (71) to the mounting brackets (72) and (73) at position Q.
(20) Remove the bolt (75), the washer (76) and the nut (78) that attach the clip (77) to the lug on the tube 7 at position R.
(21) Remove the bolt (79), the washer (80) and the nut (82) that attach the clip (81) to the lug on the tube 1 at position S.
(22) Make a note of the position of the spacer (86). Remove the bolt (83), the washer (84), the spacer (86) and the nut (88) that attach the clips (85) and (87) to the lug on the tube 7 at position T.
(23) Make a note of the position of the spacer (92). Remove the bolt (89), the washer (90), the spacer (92) and the nut (93) that attach the clip (91) to the lug on the tube 1 at position U.
(24) Disconnect the electrical connector 4007VC-A from the electrical receptacle 4007VC.
(25) Remove the four screws (95) and the four nuts (96) that attach the electrical receptacle 4007VC to the bracket (94) on flange FJ at position V.
SBE 79-0088
(26) Remove the four screws (95) and the four nuts (96) that attach the electrical receptacle 4007VC to the bracket (94) at position V.
END OF SBE 79-0088
(27) Remove the core EGT harness.
B. Put the applicable CAP - BLANKING, COVER - PROTECTION and PLUG - BLANKING on all the openings.