S 865-106

 (2)  
Set the ARINC 429 bus reader to these parameters:

 Octal Label: 207
 SDI: 1 (Bit 10=0, Bit 9=1)
 Display: Engineering Units

 (a)  Make sure the data bus reader shows a VMO of 362 knots.
 S 865-107
 (3)  Set the ARINC 429 bus reader to these parameters:
 Octal Label: 251
 SDI: 1 (Bit 10=0, Bit 9=1)
 Display: Binary

 (a)  Make sure bits 30 and 31 of label 251 are in the one state.
 S 865-331
 (4)  Set the ARINC 429 bus reader to these parameters:
 Octal Label: 252
 SDI: 1 (Bit 10=0, Bit 9=1)
 Display: Binary

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 (a)  Make sure bits 30 and 31 of label 252 are in the one state.
 (5)  S 085-109Disconnect the ARINC 429 bus reader from the L ADC front panel TEST ONLY connector.
 (6)  S 485-110Connect the ARINC 429 bus reader to the R ADC front panel TEST ONLY connector.
 (7)  S 865-111Set the ARINC 429 bus reader to these parameters:
 Octal Label: 207 SDI: 2 (Bit 10=1, Bit 9=0) Display: Engineering Units
 (a)  Make sure the data bus reader shows a VMO of 362 knots.
 (8)  S 865-112Set the ARINC 429 bus reader to these parameters:
 Octal Label: SDI: Display:  2512 (Bit 10=1, Bit 9=0)Binary
 (a)  Make sure bits 30 and 31 of label 251 are in the one state.
 (9)  S 865-332Set the ARINC 429 bus reader to these parameters:
 Octal Label: SDI: Display:  2522 (Bit 10=1, Bit 9=0)Binary
 (a)  Make sure bits 30 and 31 of label 252 are in the one state.
 S 085-114

 (10) Disconnect the ARINC 429 bus reader from the R ADC front panel TEST ONLY connector.
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MAINTENANCE MANUAL

 S 725-115
 (11) Do these steps to do a test of the maximum operating speed for the center ADC:
 (a) (b) (c)  Set the AIR DATA switch on the first officer's SOURCE SELECT module to the C position.Connect the ARINC 429 bus reader to the C ADC front panel TEST ONLY connector.Set the ARINC 429 bus reader to these parameters:
 Octal Label: 207 SDI: 2 (Bit 10=1, Bit 9=0) Display: Engineering Units
 (d)  1) Make sure the data bus reader shows a VMO of 362 knots.Set the ARINC 429 bus reader to these parameters:
 Octal Label: SDI: Display:  2512 (Bit 10=1, Bit 9=0)Binary
 (e)  1) Make sure bits 30 and 31 of label 251 are in the one state.Set the ARINC 429 bus reader to these parameters:
 Octal Label: SDI: Display:  2522 (Bit 10=1, Bit 9=0)Binary
 (f) (g)  1) Make sure bits 30 and 31 of label 252 are in the one state.Set the AIR DATA switch on the first officer's SOURCE SELECT module to the R position.Set the ARINC 429 bus reader to these parameters:
 Octal Label: SDI: Display:  2511 (Bit 10=0, Bit 9=1)Binary
 (h)  1) Make sure bits 30 and 31 of label 251 are in the one state.Set the ARINC 429 bus reader to these parameters:
 Octal Label: SDI: Display:  2521 (Bit 10=0, Bit 9=1)Binary
 (i)  1) Make sure bits 30 and 31 of label 252 are in the one state.Disconnect the ARINC 429 bus reader from the C ADC front panel TEST ONLY connector.

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747-400 MAINTENANCE MANUAL
 K. Alternate VMO Switch Test
 S 025-156
 (1)  
　
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