Installation of the Ignition Leads [IAE]

TASK 74-21-43-400-010-B
Installation of the Ignition Leads

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: DO NOT BEND THE IGNITION LEAD TOO MUCH WHEN YOU CONNECT THE ELECTRICAL CONNECTOR. THE IGNITION LEAD CAN BE DAMAGED AND CAN CAUSE ELECTRICAL CIRCUIT DEFECTS.

ZONE: 400
FIN: 4002JH1 ** ON A/C NOT FOR ALL
FIN: 4002JH2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )
No specific	Torque wrench: range to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
No specific	Torque wrench: range to between 160 and 140 lbf.in (1.81 and 1.58 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-124)	Isopropyl Alcohol, Technical grade

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	GROMMET	AIPC 74-21-41-80-100
2	GROMMET	AIPC 74-21-43-80-020

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-00-00-710-017-B	Ground Test Requirements after Power Plant Module/Component Repair or Replacement Procedures
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
Connectors and Clip Points
Ignition Lead
Clip Points

3. Job Set-up
Subtask 74-21-43-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 74-21-43-010-053-A ** ON A/C NOT FOR ALL

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 right thrust reverser half is open: (Ref. AMM TASK 78-32-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 74-21-43-040-050-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).

4. Procedure
Subtask 74-21-43-420-051-A ** ON A/C NOT FOR ALL

A. Installation of the Ignition Leads 4002JH1 (4002JH2)

CAUTION: YOU MUST USE PRE SBE 70-1004 IGNITION LEADS WITH PRE SBE 70-1005 COUPLING SHROUDS. YOU MUST USE POST SB 70-1004 IGNITION LEADS WITH POST SBE 70-1005 COUPLING SHROUDS.

(1) Remove all covers/caps/plugs from the opening.
(2) Ensure that the electrical terminal at each end are thoroughly cleaned with V01-124Isopropyl Alcohol, Technical grade.
(3) Install the ignition leads.
(a) PRE SBE 70-1004 ONLY: Install new AIPC 74-21-43-80-020 GROMMET (2) and AIPC 74-21-41-80-100 GROMMET (7) on to the ignition leads (1) and (6).
(b) Install the ignition leads (1) and (6) through the clamps (3), (5), (8) and (10) and connect the leads to the ignition exciters and the ignitor plugs.
(c) TORQUE the connectors of the ignition leads (1) and (6) to between 160 and 140 lbf.in (1.81 and 1.58 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(4) Install the cooling shrouds (4) and (9).

CAUTION: YOU MUST USE PRE SBE 70-1004 IGNITION LEADS WITH PRE SBE 70-1005 COUPLING SHROUDS. YOU MUST USE POST SB 70-1004 IGNITION LEADS WITH POST SBE 70-1005 COUPLING SHROUDS.

CAUTION: DO NOT ASSOCIATE A CHANNEL WITH IGNITION LEADS AND COUPLING SHROUDS THAT ARE PRE SB 70-1004 AND 70-1005 AND A CHANNEL WITH IGNITION LEADS AND COUPLING SHROUDS THAT ARE POST SB 70-1004 AND 70-1005. IGNITION LEADS AND COUPLING SHROUDS ARE ONLY INTERCHANGEABLE IN FULL SETS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO EQUIPMENT CAN OCCUR.

(a) Install the cooling shrouds (4) and (9) on to the connections between the ignition exciters and the ignition leads (1) and (6) and the connections between the ignitor plugs and the ignition leads (1) and (6).
(b) Install the clamps (3), (5), (8) and (10) to the cooling shrouds (4) and (9).
(c) TORQUE the clamps to between 25 and 20 lbf.in (0.28 and 0.23 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(5) Assemble the clip points of the ignition leads.
(a) Install the bolt (14), the washers (15) and (19), the clips (16) and (18), the spacer (17) and the nut (20) to the clip point at detail D.
(b) Install the bolt (11), the washer (12) and the clip (13) to the clip point at detail E.
(c) Install the bolt (22), the washer (21) and the clip (23) to the clip point at detail F.
(d) Install the bolt (26), the washer (25) and the clip (24) to the clip point at detail G.
(e) Install the bolt (41), the washer (42) and the clips (43) and (44) to the clip point at detail H.
(f) Install the bolt (29), the washer (28) and the clip (27) to the clip point at detail J.
(g) Install the bolt (37), the washer (38), the clip (39) and the nut (40) to the clip point at detail K.
(h) Install the bolt (36), the washers (31) and (35), the clips (32) and (34), the spacer (33) and the nut (30) to the clip point at detail L.
(i) TORQUE the bolts (11), (14), (22), (26), (29), (36), (37) and (41) to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013)

Subtask 74-21-43-865-053-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 1000EM1 (ENGINE1)
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
FOR FIN: 1000EM2 (ENGINE2)
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40

Subtask 74-21-43-720-051-A ** ON A/C NOT FOR ALL

C. For test requirements: (Ref. AMM TASK 71-00-00-710-017).

5. Close-up
Subtask 74-21-43-410-051-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 right thrust reverser half (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
452AR
(b) FOR [1000EM2] (ENGINE-2)
462AR

Subtask 74-21-43-440-051-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 74-21-43-410-053-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 03:08:11 UTC