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.
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34-12-00
ALL ú ú 12 Page 527 ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
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
34-12-00
ALL ú ú 13 Page 528 ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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