(b)
TRK flag shows on the first officer’s EFIS display.
(c)
Heading or track does not show on first officer’s EFIS display.
(d)
PITCH message shows on the first officer’s EFIS display.
(e)
ROLL message shows on the first officer’s EFIS display.
(f)
Vertical speed pointer removed from view on the first officer’s EFIS display.
(g)
ATT flag shows on the first officer’s EFIS display.
(h)
VSI flag shows on the first officer’s EFIS display.
B. Possible Causes
(1)
Right ADIRU, M1752
(2)
DEU 2, M1809
(3)
Wiring between ADR to IR
(4)
Wiring between the ADIRUs and the DEU 2
C. Circuit Breakers
(1) These are the primary circuit breakers related to the fault:
CAPT Electrical System Panel, P18-1
Row Col Number Name
E 5 C01009 ADIRU LEFT DC
E 7 C01007 ADIRU LEFT AC
CAPT Electrical System Panel, P18-2
Row Col Number Name
E 8 C00425 ADIRU LEFT EXC
F/O Electrical System Panel, P6-1
Row Col Number Name
C 14 C01008 ADIRU RIGHT AC
C 15 C00426 ADIRU RIGHT EXC
C 17 C01010 ADIRU RIGHT DC
EFFECTIVITY
34-21 TASKS 825-826
SIL ALL
Page 251 D633A103-SIL Oct 15/2008
Row Col Number Name
D 9 C01362 DISPLAY DEU 2 HOLDUP
D 11 C01360 DISPLAY DEU 2 PRI
D. Related Data
(1)
(SSM 34-21-11)
(2)
(WDM 34-21-11)
(3)
(WDM 34-62-11)
E. Initial Evaluation
(1)
Do these steps to prepare for initial evaluation and fault isolation:
(a)
Make sure the DISPLAY switch on the P5 panel is in the AUTO position.
(b)
Make sure the IRS switch on the P5 panel is in the NORMAL position.
(c)
Make sure the right ADIRS is aligned and in the NAV mode.
(2)
If the observed fault shows on the first officer’s EFIS display, then do the Fault Isolation Procedure below.
(3)
If the observed fault does not show on the first officer’s EFIS display, then there was an intermittent fault.
F. Fault Isolation Procedure
(1)
Do
the
DEU
2
BITE
(31-62
TASK
801).
(a)
If there is a fault message that relates to the DEU 2 internal fault, the first officer’s EFIS display, or the right ADIRU; then go to the FIM task to clear that message.
(b)
After you clear the DEU 2 maintenance messages, if the observed fault does not show on the first officer’s EFIS display, then you corrected the fault.
(c)
After you clear the DEU 2 maintenance messages, if the observed fault continues to show on the first officer’s EFIS display, then continue.
(2)
Do
the
right
ADIRS
BITE
(34-21
TASK
801).
(a)
If there is a right ADIRS fault message that shows on the CDU, then go to the FIM task to clear that message.
(b)
After you clear the right ADIRS maintenance messages, if the observed fault does not show on the first officer’s EFIS display, then you corrected the fault.
(c)
After you clear the right ADIRS maintenance messages, if the observed fault continues to show on the first officer’s EFIS display, then continue.
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