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 Failure of the ECU PS3 Pressure Sensor - Engine 2 - Channel A
 1. Possible Causes
_______________
 - ECU (4000KS)

 - PS3 line

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 72-00-00-200-026 Inspection/Check of the PS3 Line AMM 72-00-00-220-001 Inspection of the PS3 Line Connections 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 non Motoring)
 3. Fault Confirmation
__________________
 A. Do the operational test of the FADEC 2A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. This failure message is generated if the PS3 line is leaking, blocked or an internal ECU processing error has occurred.
 (1) If the failure message ECU, PS3 SNSR LINE is not confirmed:
 (a) Inspect PS3 line:
 - do a visual check of the PS3 line for dents, cracks, wear and weep holes free from obstruction (Ref. AMM TASK 72-00-00-200-026) and to make sure connections are properly tightened and in place (Ref. AMM TASK 72-00-00-220-001).
 1 If damage is found:
_
 - replace or retighten PS3 line (Ref. AMM TASK 72-00-00-220-001).
 2 If no damage is found:
_ - no maintenance action is required.
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 (2) If the failure message ECU, PS3 SNSR LINE is not confirmed, but is repetitive:

 (a) Replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).

 (b) If the fault continues:

 - inspect PS3 line.

 (3) If the failure message ECU, PS3 SNSR LINE is confirmed:

 1_ Do a visual check of the PS3 line for dents, cracks, wear and
 weep holes free from obstruction (Ref. AMM TASK 72-00-00-200-
026) and to make sure connections are properly tightened and
 in place (Ref. AMM TASK 72-00-00-220-001).
 - replace or retighten PS3 line (Ref. AMM TASK 72-00-00-220-
001) as required.

 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 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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ECES  TASK 73-20-00-810-869 PS3 Sensors Disagree Between Both Channels on Engine 1

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 1. Possible Causes
_______________
 - ECU (4000KS)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU)(4000KS) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU)(4000KS) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC 1A on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message ECU (PS3 DISAGREE) or ECU (PS3 DISAGREE)*:
 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) (Ref. AMM TASK 73-21-60-400-001).
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