S 865-080
(12)
Set the EIU SEL switch on the P2-4 panel to the R position.
S 865-081
(13)
Open the 7F10 EIU C circuit breaker on the P7 panel.
(a) Make sure that the >IRS DC LEFT message comes into view on the main EICAS display.
S 865-082
(14)
Set the IRS L mode switch on the MSU to the OFF position.
S 865-083
(15)
Open the 6D7 IRS AC LEFT circuit breaker on the P6 panel.
S 865-084
(16)
Close the 6D8 IRS AC CENTER circuit breaker on the P6 panel.
S 865-085
(17)
Set the IRS C mode switch on the MSU to the ATT position.
(a) Make sure that the IRS ALIGN MODE C and >IRS DC CENTER messages come into view on the main EICAS display. 1) Make sure that the IRS ALIGN MODE C message goes out of
view within 30 seconds.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
34-21-00
ALL ú ú 08A Page 504 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-086
(18)
Close the 7F10 EIU C circuit breaker on the P7 panel.
S 865-188
(19)
Set the EIU SEL switch on the P2-4 panel to the C position.
S 865-087
(20)
Open the 7F15 EIU R circuit breaker on the P7 panel.
(a) Make sure that >IRS DC CENTER comes into view on the main EICAS display.
S 865-088
(21)
Close the 7F9 EIU L circuit breaker on the P7 panel.
S 865-089
(22)
Set the EIU SEL switch on the P2-4 panel to the L position.
S 865-090
(23)
Open the 7F10 EIU C circuit breaker on the P7 panel.
(a) Make sure that >IRS DC CENTER comes into view on the main EICAS display.
S 865-091
(24)
Set the IRS C mode switch on the MSU to the OFF position.
S 865-092
(25)
Open the 6D8 IRS AC CENTER circuit breaker on the P6 panel.
S 865-093
(26)
Close the 6D9 IRS AC RIGHT circuit breaker on the P6 panel.
S 865-094
(27)
Set the IRS R mode switch on the MSU to the ATT position.
(a) Make sure that the IRS ALIGN MODE R and >IRS DC RIGHT messages come into view on the main EICAS display. 1) Make sure that the IRS ALIGN MODE R message goes out of
view within 30 seconds.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
34-21-00
ALL ú ú 08A Page 505 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 865-095
(28)
Close the 7F10 EIU C circuit breaker on the P7 panel.
S 865-096
(29)
Set the EIU SEL switch on the P2-4 panel to the C position.
S 865-097
(30)
Open the 7F9 EIU L circuit breaker on the P7 panel.
(a) Make sure that >IRS DC RIGHT comes into view on the main EICAS display.
S 865-098
(31)
Close the 7F15 EIU R circuit breaker on the P7 panel.
S 865-099
(32)
Set the EIU SEL switch on the P2-4 panel to the R position.
S 865-100
(33)
Open the 7F10 EIU C circuit breaker on the P7 panel.
(a) Make sure that >IRS DC RIGHT comes into view on the main EICAS display.
S 865-101
(34)
Set the IRS R mode switch on the MSU to the OFF position.
S 865-102
(35)
Open the 6D9 IRS AC RIGHT circuit breaker on the P6 panel.
S 865-103
(36)
Close the 6E7 IRS DC LEFT circuit breaker on the P6 panel.
S 865-104
(37)
Set the IRS L mode switch on the MSU to the ATT position.
(a) Make sure that >IRS AC LEFT comes into view on the main EICAS display.
(38)
Set the IRS L mode switch on the MSU to the OFF position.
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