A320 Trouble Shooting Manual 排故手册 STARTING 起动(12)

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R R R  a_  If the resistance values are out of the specified limits:- replace the starter shutoff valve (Ref. AMM TASK 80-11-20-000-003) and (Ref. AMM TASK 80-11-20-400-003).
R R R  b_  If the resistance values are in the specified limits:- connect the harnesses HJ9 (channel A) and HJ10 (channel B) to the starter shutoff valve and continue the trouble shooting procedure. 
R R  (b) Disconnect the harnesses HJ9 (channel A) and HJ10 (channel B) from the ECU (4000KS) and visually examine the receptacles and the connectors for damaged pins and contamination (Ref. AMM TASK 73-21-50-210-001).
 1_ If damage is found: - repair or replace as required.
R R  2_  If no damage is found:- do an electrical resistance test through each harness HJ9 and HJ10 between: . pin 11 and pin 12 (15 to 60 ohms) . pin 11 and pin 3 (>10 megohms) . pin 11 and the ground (>10 megohms).

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R R R  a_ If the resistance values are in the specified limits: - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001), - repeat the fault confirmation given in Para.3.A if the fault continues. 
R R R  b_  If the resistance values are out of the specified limits:- replace the harness with the resistance values out of the limits: . harness HJ9 (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042), . harness HJ10 (Ref. AMM TASK 73-21-50-000-043) and (Ref. AMM TASK 73-21-50-400-043).
 B. Do the test given in Para. 3.A.
 (1) No additional maintenance action is required if the fault is not confirmed.
 (2) Repeat the fault isolation procedure if the fault continues.

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 TASK 80-11-00-810-803

R  Failure of the Starter Shutoff Valve - Engine 1 - Channel A
 1. Possible Causes
_______________

R - starter shutoff valve
 - harness HJ9

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-50-000-042 Removal of the HJ9 Harness AMM 73-21-50-210-001 Visual Inspection of the Wiring Harness AMM 73-21-50-400-042 Installation of the HJ9 Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with
 Engine Motoring)

R  AMM 80-11-00-040-045 Manually Close the Starter Valve after Engine Start AMM 80-11-20-000-003 Removal of the Starter Shutoff Valve AMM 80-11-20-400-003 Installation of the Starter Shutoff Valve
 3. Fault Confirmation
__________________
 A. Test

 (1) Do the operational test of the FADEC 1A on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________

R A. This fault is generated if the actual starter shutoff valve position and R the demanded valve position disagree for a set time interval.
 NOTE : The starter air duct pressure is expected to be greater than 25
____ psi (1.72 bar). If the starter air duct pressure is less than 25 psi:
R - do the trouble shooting of the bleed air system (TSM chapter 49 R if the APU was used),
 - check that supplying engine speed was correct if cross bleed start was performed (increase engine speed for higher bleed pressure).
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 (1) If the failure message START AIR, SAV is not confirmed: R
R (a) No maintenance action is required.
 (2) If the failure message START AIR, SAV is not confirmed but is repetitive:
 - replace the starter shutoff valve (Ref. AMM TASK 80-11-20-000-003) and (Ref. AMM TASK 80-11-20-400-003).
R (a) If the fault continues during the subsequent flights:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
R (b) If the fault continues during the subsequent flights:
 - replace the harness HJ9 (channel A) (Ref. AMM TASK 73-21-50-000-042) and (Ref. AMM TASK 73-21-50-400-042).
　
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