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747-400 MAINTENANCE MANUAL
 (4)  S 865-462Turn the BARO set control on the first officer's EFIS control panel clockwise. (a) Make sure the altitude on the first officer's PFD increases.
 (5)  S 865-463Turn the BARO set control on the first officer's EFIS control panel counter-clockwise. (a) Make sure the altitude on the first officer's PFD decreases.
 (6)  S 865-061Set the AIR DATA switch on the first officer's SOURCE SELECT module to the C position.
 (7)  S 865-467Turn the BARO set control on the first officer's EFIS control panel clockwise. (a) Make sure the altitude on the first officer's PFD increases.
 (8)  S 865-468Turn the BARO set control on the first officer's EFIS control panel counter-clockwise. (a) Make sure the altitude on the first officer's PFD decreases.
 (9)  S 865-323Set the AIR DATA switch on the first officer's SOURCE SELECT module to the R position.
 S 865-308

 (10) Push the STD switch on the BARO set control of the captain's and first officer's EFIS control panels.
 (a)  Make sure the standard barometric reference (STD) replaces the selected barometric reference on the captain's and first officer's PFDs.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 G. Angle of Attack Sensor Test
 S 485-005
 (1)  
Install an angular displacement measuring tool on the left AOA vane.

 S 825-542

 (2)  
Move the left AOA vane to 0 degrees with the angular displacement measuring tool.

 S 485-006

 (3)  
Connect an ARINC 429 bus reader to the L ADC front panel TEST ONLY connector.

 S 865-128

 (4)  
Set the ARINC 429 bus reader to these parameters:

 Octal Label: 221
 SDI: 1 (Bit 10 = 0, Bit 9 = 1)
 Display: Engineering Units

 (a)  Make sure the AOA on the bus reader is -0.36 to 0.36 degrees.
 S 825-543
 (5)  Move the left AOA vane to 10 degrees with the angular displacement measuring tool.
 (a)  Make sure the AOA on the bus reader is 9.64 to 10.36 degrees.
 S 825-544
 (6)  
Move the left AOA vane to -10 degrees with the angular displacement measuring tool.

 (a)  Make sure the AOA on the bus reader is -10.36 to -9.64 degrees.

 (7)  
Make a record of the No. 1 left AOA vane value.

 (8)  
Set the ARINC 429 bus reader to these parameters:

 S 975-350
 S 865-E16
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 Octal Label: 350
 SDI: 1 (Bit 10 = 0, Bit 9 = 1)
 Display: Binary

 (a)  Make sure bits 11 and 12 of label 350 are in the zero state.
 S 865-E14
 (9)  Open the 7A12 AOA L circuit breaker on the P7 panel.
 (a)  Make sure bit 11 of label 350 is in the one state and bit 12 is in the zero state.
 S 865-130
 (10) Open the 7A13 AOA ALTN L circuit breaker on the P7 panel.
 (a)  Make sure bit 12 of label 350 is in the one state.
 S 865-545
 (11)
 Close the 7A13 AOA ALTN L circuit breaker on the P7 panel.

 S 825-546

 (12)
 Move the left AOA vane to 0 degrees with the angular displacement measuring tool.

 S 865-E17

 (13)
 Set the ARINC 429 bus reader to these parameters:

 Octal Label: 221
 SDI: 1 (Bit 10 = 0, Bit 9 = 1)
 Display: Engineering Units

 (a)  Make sure the AOA on the bus reader is -0.36 to 0.36 degrees.
 S 825-547
 (14) Move the left AOA vane to 10 degrees with the angular displacement measuring tool.
　
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