(2) Repeat the fault isolation procedure if the fault continues.

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R TASK 75-30-00-810-829
R Bleed Bias System on Engine 1
R 1. Possible Causes
_______________
R - Ignore the VTURI, BLD SNSR, ECU message. No maintenance action is required R - Ignore the VTURI, BLD SNSR, ECU* message. No maintenance action is R required
R 2. Job Set-up Information
______________________
R Not Applicable
R 3. Fault Confirmation
__________________
R A. Not applicable, the Bleed Bias System is not installed.
R 4. Fault Isolation
_______________
R A. On Channel 1A:
R Ignore the VTURI, BLD SNSR, ECU message. No maintenance action is
R required Ignore the VTURI, BLD SNSR, ECU* message. No maintenance action
R is required.

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R TASK 75-30-00-810-830
R Bleed Bias System on Engine 2
R 1. Possible Causes
_______________
R - Ignore the VTURI, BLD SNSR, ECU message. No maintenance action is required R - Ignore the VTURI, BLD SNSR, ECU* message. No maintenance action is R required
R 2. Job Set-up Information
______________________
R Not Applicable
R 3. Fault Confirmation
__________________
R A. Not applicable, the Bleed Bias System is not installed.
R 4. Fault Isolation
_______________
R A. On Channel 2A:
R Ignore the VTURI, BLD SNSR, ECU message. No maintenance action is
R required Ignore the VTURI, BLD SNSR, ECU* message. No maintenance action
R is required.

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R TASK 75-30-00-810-831
R Bleed Bias System on Engine 1
R 1. Possible Causes
_______________
R - Ignore the BLD SNSR, J15, ECU message. No maintenance action is required R - Ignore the BLD SNSR, J15, ECU* message. No maintenance action is required R 2. Job Set-up Information
______________________ R Not Applicable R 3. Fault Confirmation
__________________ R A. Not applicable, the Bleed Bias System is not installed. R 4. Fault Isolation
_______________
R A. On Channel 1A:
R Ignore the BLD SNSR, J15, ECU message. No maintenance action is required
R Ignore the BLD SNSR, J15, ECU* message. No maintenance action is
R required.

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R TASK 75-30-00-810-832
R Bleed Bias System on Engine 2
R 1. Possible Causes
_______________
R - Ignore the BLD SNSR, J15, ECU message. No maintenance action is required R - Ignore the BLD SNSR, J15, ECU* message. No maintenance action is required R 2. Job Set-up Information
______________________ R Not Applicable R 3. Fault Confirmation
__________________ R A. Not applicable, the Bleed Bias System is not installed. R 4. Fault Isolation
_______________
R A. On Channel 2A:
R Ignore the BLD SNSR, J15, ECU message. No maintenance action is required
R Ignore the BLD SNSR, J15, ECU* message. No maintenance action is
R required.

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 Failure of the Control of the VBV Actuator on Engine 1
 1. Possible Causes
_______________
 - VBV ballscrew actuator

 - flexible shaft

 - VBV gear motor

 - VBV stop mechanism

 - VBV master door actuator

 - main flexible shaft

 - VBV sensor (RVDT)

 - ECU (4000KS)

 - Hydromechanical Unit (HMU)

 - harness HJ8
　
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