DOC AIRBUS | AMM A320FRemoval of the Fire Detection (System B) Harness [IAE]
TASK 71-52-42-000-010-B
Removal of the Fire Detection (System B) Harness
1. Reason for the Job
This TASK is for V2500-A5 engines.
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 71-52-42-941-051-A ** ON A/C NOT FOR ALL
Subtask 71-52-42-020-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:30:50 UTC
Removal of the Fire Detection (System B) Harness
1. Reason for the Job
This TASK is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | COVER - BLANKING |
| No specific | AR | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 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 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 |
Fire Detection (System B) Harness - Connector and Clip Point LocationsSubtask 71-52-42-941-051-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 71-52-42-010-051-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):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Put the ACCESS PLATFORM 1M(3 FT) in position on the right side of the core engine.
Subtask 71-52-42-040-050-A ** ON A/C NOT FOR ALL (1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Put the ACCESS PLATFORM 1M(3 FT) in position on the right side of the core engine.
C. Deactivate the thrust reverser.
Subtask 71-52-42-010-053-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 71-52-42-020-051-A ** ON A/C NOT FOR ALL
A. Remove the Fire Detection (System B) Harness as follows:
Pre SBE 72-0189
(1) Disconnect the fire detection (system B) harness
(a) Make a note of the position of the harness. It must be put in the same position on installation.
(b) Disconnect the electrical connectors:
1 Disconnect the connector 454VC at the aft pylon-interface-panel.
2 Disconnect the connector 4001WD2-A at the fire detector.
(2) Put the applicable COVER - BLANKING on the electrical connectors and the electrical receptacles.
(3) Release the fire detection (system B) harness from the core engine
(a) Make a note of the positions of the parts before they are removed. They must be put in the same positions on installation.
(b) Remove the nut (2), the washer (3) and the bolt (1) which attach the clip (4) to the tube (Ref. detail at A).
(c) Remove the nut (9), the washer (8), the bolt (5) and the spacers (6) and (7) which attach the clip (10) to the tube (Ref. detail at B).
(d) Remove the harness from the clips (4) and (10) (Ref. detail at A and B).
(e) Remove the nut (21), the bolt (25) and the spacers (23) and (24) which attach the clip (22) to the tube (Ref. detail at C).
(f) Remove the harness from the clip (22) (Ref. detail at C).
(g) Remove the bolts (28) and (29) and the washers (27) and (30) which attach the clips (26) and (31) to the engine bracket (Ref. detail at D).
(h) Remove the nut (43), the bolt (46), the washer (45) and the spacer (42) which attach the tube clip, the Nacelle Temperature Sensor Harness clip and the clip (44) to the engine raceway (Ref. detail at E).
(i) Remove the nut (50), the washer (47) and the bolt (48) which attach the clip (49) to the engine raceway (Ref. detail at F).
(j) Remove the harness from the clips (26), (31), (44) and (49) (Ref. detail at D, E and F).
(k) Remove the nut (55), the bolt (54) and the washer (53) which attach the clip (52) to the engine raceway (Ref. detail at G).
(l) Remove the nut (60), the bolt (57), the washer (58) and the spacer (59) which attach the clip (56) to the engine raceway (Ref. detail at H).
(m) Remove the harness from the clips (52) and (56) (Ref. detail at G and H).
(n) Remove the nut (72), the bolt (75), the washer (74) and the spacer (71) which attach the clip (73) to the engine raceway (Ref. detail at J).
(o) Remove the nut (76), the bolt (77) and the washer (78) which attach the clip (79) to the engine raceway (Ref. detail at K).
(p) Remove the harness from the clips (73) and (79) (Ref. detail at J and K).
(q) Remove the nut (81), the bolt (82) and the spacer (83) which attach the raceway clip and the clip (80) to the tube (Ref. detail at L).
(r) Remove the nut (85), the bolt (87) and the washer (86) which attach the tube clip and the clip (84) to the tube (Ref. detail at M).
(s) Remove the nut (101), the washer (100), the bolt (99) and the washer (98) which attach the ignition supply harness clip and the clip (102) to the engine bracket (Ref. detail at N).
(t) Remove the harness from the clips (80), (84) and (102) (Ref. detail at L, M and N).
(u) Remove the bolt (104) which attaches the clip (103) to the engine bracket (Ref. detail at P).
(v) Remove the bolt (107), the washer (108) and the spacer (105) which attach the clip (106) to the engine bracket (Ref. detail at Q).
(w) Remove the nut (113), the washer (112), the bolt (109) and the washer (110) which attach the clip (111) to the tube (Ref. detail at R).
(x) Remove the harness from the clips (103), (106) and (111) (Ref. detail at P, Q and R).
(y) Remove the nut (126), the washer (127), the bolt (124) and the washer (128) which attach the tube clip and the clip (125) to the tube (Ref. detail at S).
(z) Remove the nut (129), the bolt (131) and the washer (132) which attach the clip (130) to the engine bracket (Ref. detail at T).
(aa) Remove the bolt (133) and the washer (134) which attach the clip (135) to the engine bracket (Ref. detail at U).
(ab) Remove the harness from the clip (125) (Ref. detail at S).
(ac) Remove the nut (138) and the bolt (136) which attach the tube clip and the clip (137) to the bracket (Ref. detail at V).
(ad) Remove the nut (152), the bolt (149) and the washer (150) which attach the tube clip and the clip (151) to the tube (Ref. detail at W).
(ae) Carefully remove the fire detection (system B) harness from the core engine.
(af) Remove and keep the remaining clips from the fire detection (system B) harness, for the installation of the new harness.
Subtask 71-52-42-020-055-A ** ON A/C NOT FOR ALL Pre SBE 72-0189
(1) Disconnect the fire detection (system B) harness
(a) Make a note of the position of the harness. It must be put in the same position on installation.
(b) Disconnect the electrical connectors:
1 Disconnect the connector 454VC at the aft pylon-interface-panel.
2 Disconnect the connector 4001WD2-A at the fire detector.
(2) Put the applicable COVER - BLANKING on the electrical connectors and the electrical receptacles.
(3) Release the fire detection (system B) harness from the core engine
(a) Make a note of the positions of the parts before they are removed. They must be put in the same positions on installation.
(b) Remove the nut (2), the washer (3) and the bolt (1) which attach the clip (4) to the tube (Ref. detail at A).
(c) Remove the nut (9), the washer (8), the bolt (5) and the spacers (6) and (7) which attach the clip (10) to the tube (Ref. detail at B).
(d) Remove the harness from the clips (4) and (10) (Ref. detail at A and B).
(e) Remove the nut (21), the bolt (25) and the spacers (23) and (24) which attach the clip (22) to the tube (Ref. detail at C).
(f) Remove the harness from the clip (22) (Ref. detail at C).
(g) Remove the bolts (28) and (29) and the washers (27) and (30) which attach the clips (26) and (31) to the engine bracket (Ref. detail at D).
(h) Remove the nut (43), the bolt (46), the washer (45) and the spacer (42) which attach the tube clip, the Nacelle Temperature Sensor Harness clip and the clip (44) to the engine raceway (Ref. detail at E).
(i) Remove the nut (50), the washer (47) and the bolt (48) which attach the clip (49) to the engine raceway (Ref. detail at F).
(j) Remove the harness from the clips (26), (31), (44) and (49) (Ref. detail at D, E and F).
(k) Remove the nut (55), the bolt (54) and the washer (53) which attach the clip (52) to the engine raceway (Ref. detail at G).
(l) Remove the nut (60), the bolt (57), the washer (58) and the spacer (59) which attach the clip (56) to the engine raceway (Ref. detail at H).
(m) Remove the harness from the clips (52) and (56) (Ref. detail at G and H).
(n) Remove the nut (72), the bolt (75), the washer (74) and the spacer (71) which attach the clip (73) to the engine raceway (Ref. detail at J).
(o) Remove the nut (76), the bolt (77) and the washer (78) which attach the clip (79) to the engine raceway (Ref. detail at K).
(p) Remove the harness from the clips (73) and (79) (Ref. detail at J and K).
(q) Remove the nut (81), the bolt (82) and the spacer (83) which attach the raceway clip and the clip (80) to the tube (Ref. detail at L).
(r) Remove the nut (85), the bolt (87) and the washer (86) which attach the tube clip and the clip (84) to the tube (Ref. detail at M).
(s) Remove the nut (101), the washer (100), the bolt (99) and the washer (98) which attach the ignition supply harness clip and the clip (102) to the engine bracket (Ref. detail at N).
(t) Remove the harness from the clips (80), (84) and (102) (Ref. detail at L, M and N).
(u) Remove the bolt (104) which attaches the clip (103) to the engine bracket (Ref. detail at P).
(v) Remove the bolt (107), the washer (108) and the spacer (105) which attach the clip (106) to the engine bracket (Ref. detail at Q).
(w) Remove the nut (113), the washer (112), the bolt (109) and the washer (110) which attach the clip (111) to the tube (Ref. detail at R).
(x) Remove the harness from the clips (103), (106) and (111) (Ref. detail at P, Q and R).
(y) Remove the nut (126), the washer (127), the bolt (124) and the washer (128) which attach the tube clip and the clip (125) to the tube (Ref. detail at S).
(z) Remove the nut (129), the bolt (131) and the washer (132) which attach the clip (130) to the engine bracket (Ref. detail at T).
(aa) Remove the bolt (133) and the washer (134) which attach the clip (135) to the engine bracket (Ref. detail at U).
(ab) Remove the harness from the clip (125) (Ref. detail at S).
(ac) Remove the nut (138) and the bolt (136) which attach the tube clip and the clip (137) to the bracket (Ref. detail at V).
(ad) Remove the nut (152), the bolt (149) and the washer (150) which attach the tube clip and the clip (151) to the tube (Ref. detail at W).
(ae) Carefully remove the fire detection (system B) harness from the core engine.
(af) Remove and keep the remaining clips from the fire detection (system B) harness, for the installation of the new harness.
B. Remove the Fire Detection (System B) Harness as follows:
SBE 72-0189
Pre SBE 75-0081
(1) Disconnect the fire detection (system B) harness
(a) Make a note of the position of the harness. It must be put in the same position on installation.
(b) Disconnect the electrical connectors:
1 Disconnect the connector 454VC at the aft pylon-interface-panel.
2 Disconnect the connector 4001WD2-A at the fire detector.
(2) Put the applicable COVER - BLANKING on the electrical connectors and the electrical receptacles.
(3) Release the fire detection (system B) harness from the core engine
(a) Make a note of the positions of the parts before they are removed. They must be put in the same positions on installation.
(b) Remove the nut (2), the washer (3) and the bolt (1) which attach the clip (4) to the tube (Ref. detail at A).
(c) Remove the nut (9), the washer (8), the bolt (5) and the spacers (6) and (7) which attach the clip (10) to the tube (Ref. detail at B).
(d) Remove the harness from the clips (4) and (10) (Ref. detail at A and B).
(e) Remove the nut (33), the bolt (36) and the spacers (34), (35) and (37) which attach the clip (32) to the tube (Ref. detail at C).
(f) Remove the harness from the clip (32) (Ref. detail at C).
(g) Remove the nut (38), the bolt (40) and the spacer (41) which attach the clip (39) to the tube (Ref. detail at X).
(h) Remove the nut (63), the bolt (61) and the spacer (64) which attach the tube clip and the clip (62) to the tube (Ref. detail at Y).
(i) Remove the nut (161) and the bolt (160) which attach the tube clip and the clip (162) to the tube (Ref. detail at Z).
(j) Remove the harness from the clips (39), (62) and (162) (Ref. detail at X, Y and Z).
(k) Remove the nut (163) and the bolt (165) which attach the clip (164) to the tube (Ref. detail at AA).
(l) Remove the nut (166) and the bolt (168) which attach the tube clip and the clip (167) to the tube (Ref. detail at AB).
(m) Remove the bolt (65) and the spacer (66) which attach the clip (67) to the engine raceway (Ref. detail at AC).
(n) Remove the harness from the clips (164), (167) and (67) (Ref. detail at AA, AB and AC).
(o) Remove the nut (153), the bolt (156), the washer (155) and the spacer (154) which attach the clip (157) to the engine raceway (Ref. detail at H).
(p) Remove the harness from the clip (157) (Ref. detail at H).
(q) Remove the nut (90), the bolt (88) and the washer (89) which attach the tube clip and the clip (91) to the engine raceway (Ref. detail at J).
(r) Remove the nut (76), the bolt (77) and the washer (78) which attach the clip (79) to the engine raceway (Ref. detail at K).
(s) Remove the harness from the clips (91) and (79) (Ref. detail at J and K).
(t) Remove the nut (81), the bolt (82) and the spacer (83) which attach the raceway clip and the clip (80) to the tube (Ref. detail at L).
(u) Remove the nut (85), the bolt (87) and the washer (86) which attach the tube clip and the clip (84) to the tube (Ref. detail at M).
(v) Remove the nut (101), the washer (100), the bolt (99) and the washer (98) which attach the ignition supply harness clip and the clip (102) to the engine bracket (Ref. detail at N).
(w) Remove the harness from the clips (80), (84) and (102) (Ref. detail at L, M and N).
(x) Remove the bolt (104) which attaches the clip (103) to the engine bracket (Ref. detail at P).
(y) Remove the bolt (107), the washer (108) and the spacer (105) which attach the clip (106) to the engine bracket (Ref. detail at Q).
(z) Remove the nut (113), the washer (112), the bolt (109) and the washer (110) which attach the clip (111) to the engine bracket (Ref. detail at R).
(aa) Remove the harness from the clips (103), (106) and (111) (Ref. detail at P, Q and R).
(ab) Remove the nut (126), the washer (127), the bolt (124) and the washer (128) which attach the tube clip and the clip (125) to the tube (Ref. detail at S).
(ac) Remove the nut (129), the bolt (131) and the washer (132) which attach the clip (130) to the engine bracket (Ref. detail at T).
(ad) Remove the bolt (133) and the washer (134) which attach the clip (135) to the engine bracket (Ref. detail at U).
(ae) Remove the harness from the clip (125) (Ref. detail at S).
(af) Remove the nut (138) and the bolt (136) which attach the tube clip and the clip (137) to the bracket (Ref. detail at V).
(ag) Remove the nut (152), the bolt (149) and the washer (150) which attach the tube clip and the clip (151) to the tube (Ref. detail at W).
(ah) Carefully remove the fire detection (system B) harness from the core engine.
(ai) Remove and keep the remaining clips from the fire detection (system B) harness, for the installation of the new harness.
Subtask 71-52-42-020-056-B ** ON A/C NOT FOR ALL SBE 72-0189
Pre SBE 75-0081
(1) Disconnect the fire detection (system B) harness
(a) Make a note of the position of the harness. It must be put in the same position on installation.
(b) Disconnect the electrical connectors:
1 Disconnect the connector 454VC at the aft pylon-interface-panel.
2 Disconnect the connector 4001WD2-A at the fire detector.
(2) Put the applicable COVER - BLANKING on the electrical connectors and the electrical receptacles.
(3) Release the fire detection (system B) harness from the core engine
(a) Make a note of the positions of the parts before they are removed. They must be put in the same positions on installation.
(b) Remove the nut (2), the washer (3) and the bolt (1) which attach the clip (4) to the tube (Ref. detail at A).
(c) Remove the nut (9), the washer (8), the bolt (5) and the spacers (6) and (7) which attach the clip (10) to the tube (Ref. detail at B).
(d) Remove the harness from the clips (4) and (10) (Ref. detail at A and B).
(e) Remove the nut (33), the bolt (36) and the spacers (34), (35) and (37) which attach the clip (32) to the tube (Ref. detail at C).
(f) Remove the harness from the clip (32) (Ref. detail at C).
(g) Remove the nut (38), the bolt (40) and the spacer (41) which attach the clip (39) to the tube (Ref. detail at X).
(h) Remove the nut (63), the bolt (61) and the spacer (64) which attach the tube clip and the clip (62) to the tube (Ref. detail at Y).
(i) Remove the nut (161) and the bolt (160) which attach the tube clip and the clip (162) to the tube (Ref. detail at Z).
(j) Remove the harness from the clips (39), (62) and (162) (Ref. detail at X, Y and Z).
(k) Remove the nut (163) and the bolt (165) which attach the clip (164) to the tube (Ref. detail at AA).
(l) Remove the nut (166) and the bolt (168) which attach the tube clip and the clip (167) to the tube (Ref. detail at AB).
(m) Remove the bolt (65) and the spacer (66) which attach the clip (67) to the engine raceway (Ref. detail at AC).
(n) Remove the harness from the clips (164), (167) and (67) (Ref. detail at AA, AB and AC).
(o) Remove the nut (153), the bolt (156), the washer (155) and the spacer (154) which attach the clip (157) to the engine raceway (Ref. detail at H).
(p) Remove the harness from the clip (157) (Ref. detail at H).
(q) Remove the nut (90), the bolt (88) and the washer (89) which attach the tube clip and the clip (91) to the engine raceway (Ref. detail at J).
(r) Remove the nut (76), the bolt (77) and the washer (78) which attach the clip (79) to the engine raceway (Ref. detail at K).
(s) Remove the harness from the clips (91) and (79) (Ref. detail at J and K).
(t) Remove the nut (81), the bolt (82) and the spacer (83) which attach the raceway clip and the clip (80) to the tube (Ref. detail at L).
(u) Remove the nut (85), the bolt (87) and the washer (86) which attach the tube clip and the clip (84) to the tube (Ref. detail at M).
(v) Remove the nut (101), the washer (100), the bolt (99) and the washer (98) which attach the ignition supply harness clip and the clip (102) to the engine bracket (Ref. detail at N).
(w) Remove the harness from the clips (80), (84) and (102) (Ref. detail at L, M and N).
(x) Remove the bolt (104) which attaches the clip (103) to the engine bracket (Ref. detail at P).
(y) Remove the bolt (107), the washer (108) and the spacer (105) which attach the clip (106) to the engine bracket (Ref. detail at Q).
(z) Remove the nut (113), the washer (112), the bolt (109) and the washer (110) which attach the clip (111) to the engine bracket (Ref. detail at R).
(aa) Remove the harness from the clips (103), (106) and (111) (Ref. detail at P, Q and R).
(ab) Remove the nut (126), the washer (127), the bolt (124) and the washer (128) which attach the tube clip and the clip (125) to the tube (Ref. detail at S).
(ac) Remove the nut (129), the bolt (131) and the washer (132) which attach the clip (130) to the engine bracket (Ref. detail at T).
(ad) Remove the bolt (133) and the washer (134) which attach the clip (135) to the engine bracket (Ref. detail at U).
(ae) Remove the harness from the clip (125) (Ref. detail at S).
(af) Remove the nut (138) and the bolt (136) which attach the tube clip and the clip (137) to the bracket (Ref. detail at V).
(ag) Remove the nut (152), the bolt (149) and the washer (150) which attach the tube clip and the clip (151) to the tube (Ref. detail at W).
(ah) Carefully remove the fire detection (system B) harness from the core engine.
(ai) Remove and keep the remaining clips from the fire detection (system B) harness, for the installation of the new harness.
C. Remove the Fire Detection (System B) Harness as follows:
SBE 72-0189
SBE 75-0081
SBE 79-0088
(1) Disconnect the fire detection (system B) harness
(a) Make a note of the position of the harness. It must be put in the same position on installation.
(b) Disconnect the electrical connectors:
1 Disconnect the connector 454VC at the aft pylon-interface-panel.
2 Disconnect the connector 4001WD2-A at the fire detector.
(2) Put the applicable COVER - BLANKING on the electrical connectors and the electrical receptacles.
(3) Release the fire detection (system B) harness from the core engine
(a) Make a note of the positions of the parts before they are removed. They must be put in the same positions on installation.
(b) Pre SBN 71-0295
Remove the nut (184), the bolt (180) and the clip (181) which attach the tube (183) to the fire/overheat detector bracket (Ref. detail at AD).
(c) SBN 71-0295
Remove the nut (230), the bolt (226) and the spacer (228) that attach the clip (232) and the tube (231) to the tube (229) (Ref. detail AJ).
(d) Remove the nut (189), the washer (186) and the bolt (185) which attach the clip (187) to the tube (188) (Ref. detail at AE).
(e) Pre SBN 71-0295
Remove the harness from the clips (181) and (187) (Ref. detail at AD and AE).
SBN 71-0295
Remove the harness from the clips (187) and (232) (Ref. detail at AE and AJ).
(f) Remove the nut (205),the bolt (200) and the washer (201) which attach the clip (204) and the clip (202) to the tube (203) (Ref. detail at AF).
(g) Remove the nut (214),the bolt (210) and the washer (211) which attach the clip (212) to the tube (213) (Ref. detail at AG).
(h) Remove the nut (225),the bolt (220), the washer (221) and the spacer (223) which attach the clip (222) to the tube (224) (Ref. detail at AH).
(i) Remove the harness from the clips (204), (212) and (222) (Ref. detail at AF, AG and AH).
(j) Remove the nut (90), the bolt (88) and the washer (89) which attach the tube clip and the clip (91) to the engine raceway (Ref. detail at J).
(k) Remove the nut (76), the bolt (77) and the washer (78) which attach the clip (79) to the engine raceway (Ref. detail at K).
(l) Remove the harness from the clips (91) and (79) (Ref. detail at J and K).
(m) Remove the nut (81), the bolt (82) and the spacer (83) which attach the raceway clip and the clip (80) to the tube (Ref. detail at L).
(n) Remove the nut (85), the bolt (87) and the washer (86) which attach the tube clip and the clip (84) to the tube (Ref. detail at M).
(o) Remove the nut (101), the washer (100), the bolt (99) and the washer (98) which attach the ignition supply harness clip and the clip (102) to the engine bracket (Ref. detail at N).
(p) Remove the harness from the clips (80), (84) and (102) (Ref. detail at L, M and N).
(q) Remove the bolt (104) which attaches the clip (103) to the engine bracket (Ref. detail at P).
(r) Remove the bolt (107), the washer (108) and the spacer (105) which attach the clip (106) to the engine bracket (Ref. detail at Q).
(s) Remove the nut (113), the washer (112), the bolt (109) and the washer (110) which attach the clip (111) to the engine bracket (Ref. detail at R).
(t) Remove the harness from the clips (103), (106) and (111) (Ref. detail at P, Q and R).
(u) Remove the nut (126), the washer (127), the bolt (124) and the washer (128) which attach the tube clip and the clip (125) to the tube (Ref. detail at S).
(v) Remove the nut (129), the bolt (131) and the washer (132) which attach the clip (130) to the engine bracket (Ref. detail at T).
(w) Remove the bolt (133) and the washer (134) which attach the clip (135) to the engine bracket (Ref. detail at U).
(x) Remove the harness from the clip (125) (Ref. detail at S).
(y) Remove the nut (171), the bolt (169), the washer (173) and the spacer (172) which attach the clip (170) to the bracket (Ref. detail at V).
(z) Remove the nut (174), the washer (179), the bolt (177) and the washer (178) which attach the clips (175) and (176) to the engine bracket (Ref. detail at W).
(aa) Carefully remove the fire detection (system B) harness from the core engine.
(ab) Remove and keep the remaining clips from the fire detection (system B) harness, for the installation of the new harness.
SBE 72-0189
SBE 75-0081
SBE 79-0088
(1) Disconnect the fire detection (system B) harness
(a) Make a note of the position of the harness. It must be put in the same position on installation.
(b) Disconnect the electrical connectors:
1 Disconnect the connector 454VC at the aft pylon-interface-panel.
2 Disconnect the connector 4001WD2-A at the fire detector.
(2) Put the applicable COVER - BLANKING on the electrical connectors and the electrical receptacles.
(3) Release the fire detection (system B) harness from the core engine
(a) Make a note of the positions of the parts before they are removed. They must be put in the same positions on installation.
(b) Pre SBN 71-0295
Remove the nut (184), the bolt (180) and the clip (181) which attach the tube (183) to the fire/overheat detector bracket (Ref. detail at AD).
(c) SBN 71-0295
Remove the nut (230), the bolt (226) and the spacer (228) that attach the clip (232) and the tube (231) to the tube (229) (Ref. detail AJ).
(d) Remove the nut (189), the washer (186) and the bolt (185) which attach the clip (187) to the tube (188) (Ref. detail at AE).
(e) Pre SBN 71-0295
Remove the harness from the clips (181) and (187) (Ref. detail at AD and AE).
SBN 71-0295
Remove the harness from the clips (187) and (232) (Ref. detail at AE and AJ).
(f) Remove the nut (205),the bolt (200) and the washer (201) which attach the clip (204) and the clip (202) to the tube (203) (Ref. detail at AF).
(g) Remove the nut (214),the bolt (210) and the washer (211) which attach the clip (212) to the tube (213) (Ref. detail at AG).
(h) Remove the nut (225),the bolt (220), the washer (221) and the spacer (223) which attach the clip (222) to the tube (224) (Ref. detail at AH).
(i) Remove the harness from the clips (204), (212) and (222) (Ref. detail at AF, AG and AH).
(j) Remove the nut (90), the bolt (88) and the washer (89) which attach the tube clip and the clip (91) to the engine raceway (Ref. detail at J).
(k) Remove the nut (76), the bolt (77) and the washer (78) which attach the clip (79) to the engine raceway (Ref. detail at K).
(l) Remove the harness from the clips (91) and (79) (Ref. detail at J and K).
(m) Remove the nut (81), the bolt (82) and the spacer (83) which attach the raceway clip and the clip (80) to the tube (Ref. detail at L).
(n) Remove the nut (85), the bolt (87) and the washer (86) which attach the tube clip and the clip (84) to the tube (Ref. detail at M).
(o) Remove the nut (101), the washer (100), the bolt (99) and the washer (98) which attach the ignition supply harness clip and the clip (102) to the engine bracket (Ref. detail at N).
(p) Remove the harness from the clips (80), (84) and (102) (Ref. detail at L, M and N).
(q) Remove the bolt (104) which attaches the clip (103) to the engine bracket (Ref. detail at P).
(r) Remove the bolt (107), the washer (108) and the spacer (105) which attach the clip (106) to the engine bracket (Ref. detail at Q).
(s) Remove the nut (113), the washer (112), the bolt (109) and the washer (110) which attach the clip (111) to the engine bracket (Ref. detail at R).
(t) Remove the harness from the clips (103), (106) and (111) (Ref. detail at P, Q and R).
(u) Remove the nut (126), the washer (127), the bolt (124) and the washer (128) which attach the tube clip and the clip (125) to the tube (Ref. detail at S).
(v) Remove the nut (129), the bolt (131) and the washer (132) which attach the clip (130) to the engine bracket (Ref. detail at T).
(w) Remove the bolt (133) and the washer (134) which attach the clip (135) to the engine bracket (Ref. detail at U).
(x) Remove the harness from the clip (125) (Ref. detail at S).
(y) Remove the nut (171), the bolt (169), the washer (173) and the spacer (172) which attach the clip (170) to the bracket (Ref. detail at V).
(z) Remove the nut (174), the washer (179), the bolt (177) and the washer (178) which attach the clips (175) and (176) to the engine bracket (Ref. detail at W).
(aa) Carefully remove the fire detection (system B) harness from the core engine.
(ab) Remove and keep the remaining clips from the fire detection (system B) harness, for the installation of the new harness.