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IGNITION - GENERAL - FAULT ISOLATION PROCEDURES
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TASK 74-00-00-810-801
R Failure of the Ignition 1 System - Engine 1 - Channel A or Channel B
1. Possible Causes
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R R - right igniter plug (A) R
- right ignition lead
- upper exciter box R - ECU (4000KS) R - HJ1 harness R - EIU-1 (1KS1)
2. Job Set-up Information
______________________
A. Referenced Information
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REFERENCE DESIGNATION
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R AMM 71-52-43-000-004
R
R AMM 71-52-43-400-004
R
R AMM 73-21-60-000-001
R AMM 73-21-60-400-001
R AMM 73-25-34-000-040
R AMM 73-25-34-400-040
AMM 74-00-00-710-040
R
AMM 74-11-10-000-002
AMM 74-11-10-400-002
AMM 74-21-10-000-002
AMM 74-21-10-400-002
AMM 74-21-30-000-002
AMM 74-21-30-400-002
R
Removal of the Environmental Control System (ECS)
Harness
Installation of the Environmental Control System
(ECS) Harness
Removal of the Electronic Control Unit (ECU)
Installation of the Electronic Control Unit (ECU)
Removal of the Engine Interface Unit (EIU)
Installation of the Engine Interface Unit (EIU)
Operational Test of the Ignition System
Removal of the Ignition Exciter (4000JH1, 4000JH2)
Installation of the Ignition Exciter (4000JH1,
4000JH2)
Removal of the Right Ignition Lead
Installation of the Right Ignition Lead
Removal of the Spark Igniter
Installation of the Spark Igniter
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3. Fault Confirmation
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R A. Do the operational test of the ignition system, by performing an aural R check of the igniter plug operation (Ref. AMM TASK 74-00-00-710-040).
R NOTE : The igniter test will spark the right igniter plug (A) for 10
____ R seconds, wait 2 seconds then spark the left igniter plug (B) for R 10 seconds. This test provides for an aural feedback of proper R ignition operation . No CFDS test results are available.
4. Fault Isolation
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R A. The failure message IGN1, ECU is generated if there is no light off
R detected 10 seconds after the fuel is turned on.
R (1) If an audible spark cannot be heard on the right igniter plug (A):
R - replace the right igniter plug (A) (Ref. AMM TASK 74-21-30-000-002)
R and (Ref. AMM TASK 74-21-30-400-002).
R (a) If an audible spark is not heard:
R - replace the right ignition lead (Ref. AMM TASK 74-21-10-000-R 002) and (Ref. AMM TASK 74-21-10-400-002).
R (b) If an audible spark is not heard:
R - replace the upper exciter box (Ref. AMM TASK 74-11-10-000-002)
R and (Ref. AMM TASK 74-11-10-400-002).
R (c) If an audible spark is not heard:
R - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and
R (Ref. AMM TASK 73-21-60-400-001).
R (d) If an audible spark is not heard:
R - replace the EIU-1 (1KS1) (Ref. AMM TASK 73-25-34-000-040) and
R (Ref. AMM TASK 73-25-34-400-040).
R (2) If an audible spark can be heard on the right igniter plug (A):
R - replace the right ignition lead (Ref. AMM TASK 74-21-10-000-002)
R and (Ref. AMM TASK 74-21-10-400-002).
R (3) If an audible spark can be heard on the right igniter (A), but the
R failure message is repetitive:
R - do the following steps after trouble shooting per steps Para.
R 4.A.(2). has been fully done,
R - replace the igniter A (right igniter plug) (Ref. AMM TASK 74-21-30-R 000-002) and (Ref. AMM TASK 74-21-30-400-002).
R (a) If the fault continues during subsequent flights:
R - replace the upper exciter box (Ref. AMM TASK 74-11-10-000-002)
R and (Ref. AMM TASK 74-11-10-400-002).
F 『 EEFF : ALL E ∞∞74-00-00∞∞∞∞∞∞∞∞∞∞Page 202 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 点火 IGNITION(2)
