S 035-202

 (2)  
Remove the safety wire from the fifth engine carriage switch in the main equipment center (Ref 20-11-28/401).

 S 865-158

 (3)  
Set the gear down dispatch switch to the GEAR DOWN DISPATCH position.

 S 485-196

 (4)  
Connect an ARINC 429 bus reader to the L ADC front panel TEST ONLY connector.

 S 865-160

 (5)  
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 bus reader shows a VMO of 267 knots.
 S 085-730
 (6)  
Disconnect the ARINC 429 bus reader from the L ADC front panel TEST ONLY connector.

 S 485-162

 (7)  
Connect an ARINC 429 bus reader to the R ADC front panel TEST ONLY connector.

 S 865-731

 (8)  
Set 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 bus reader shows a VMO of 267 knots.
 S 085-164
 (9)  Disconnect the ARINC 429 bus reader from the R ADC front panel TEST ONLY connector.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

 S 725-732
 (10) Do these steps to do a test of the gear down dispatch switch for the center ADC:
 (a) (b)  Set the AIR DATA switch on the first officer's SOURCE SELECT module to the C position.Connect an ARINC 429 bus reader to the C ADC front panel TEST ONLY connector.
 (c)  Set the ARINC 429 bus reader to these parameters:
 Octal Label:  207
 SDI: Display:  2 (Bit 10 = 1, Bit 9 = 0)Engineering Units
 (d)  1) Make sure the bus reader shows a VMO of 267 knots.Disconnect the ARINC 429 bus reader from the C ADC front panel TEST ONLY connector.
 (e)  Set the AIR DATA switch on the first officer's SOURCE SELECT module to the R position.

 S 865-737
 (11)
 Set the gear down dispatch switch to the NORMAL VMO position.

 S 425-016

 (12)
 Install a safety wire on the gear down dispatch switch (Ref 20-11-28/401).

 S 865-168

 (13)
 Set the fifth engine carriage switch to the FIFTH ENGINE CARRIAGE position.

 S 485-740

 (14)
 Connect an ARINC 429 bus reader to the L ADC front panel TEST ONLY connector.

 S 865-741

 (15)
 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 bus reader shows a VMO of 327 knots.
 S 085-742
 (16)
 Disconnect the ARINC 429 bus reader from the L ADC front panel TEST ONLY connector.

 S 485-176

 (17)
 Connect an ARINC 429 bus reader to the R ADC front panel TEST ONLY connector.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 S 865-743
 (18) Set 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 bus reader shows a VMO of 327 knots.
 S 085-180
 (19)
 Disconnect the ARINC 429 bus reader from the R ADC front panel TEST ONLY connector.

 S 725-745

 (20)
 Do these steps to do a test of the fifth engine carriage switch for the center ADC:

 (a) (b)  Set the AIR DATA switch on the first officer's SOURCE SELECT module to the C position.Connect an ARINC 429 bus reader to the C ADC front panel TEST ONLY connector.
　
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