(a)
For
the
applicable
ADIRU,
do
this
task:
ADIRS
BITE
Procedure,
34-21
TASK
801.
(b)
If the maintenance message does not show on the CDU and the status code does not show on the ISDU, then you corrected the fault.
(c)
If the maintenance message shows on the CDU and the status code shows on the ISDU, then continue.
(2)
Do this check of the wiring between the applicable ADIRU and pitot ADM:
(a)
Remove the applicable ADIRU. To remove it, do this task: Air Data Inertial Reference Unit Removal, AMM TASK 34-21-01-000-801.
(b)
For the left ADIRU, disconnect the connector D3689 from the left pitot ADM.
(c)
For the right ADIRU, disconnect the connector D3695 from the right pitot ADM.
(d)
For the left ADIRU, do a wiring check between these pins of connector D3689 and connector D3687A for the ADIRU:
D3689 D3687A
pin7 -------------------pinD10 pin8 -------------------pinE10 pin1 -------------------pinG6 pin3 -------------------pinH6 pin5 -------------------pinJ6
(e) For the right ADIRU, do a wiring check between these pins of connector D3695 and connector D3693A for the ADIRU:
D3695 D3693A
pin7 -------------------pinD10 pin8 -------------------pinE10 pin1 -------------------pinG6 pin3 -------------------pinH6 pin5 -------------------pinJ6
(f) If you find a problem with the wiring, then do these steps: 1) Repair the wiring. 2) For the left ADIRU, re-connect the connector D3689 to the left pitot ADM. 3) For the right ADIRU, re-connect the connector D3695 to the right pitot ADM. 4) Re-install the applicable ADIRU. To install it, do this task: Air Data Inertial Reference
Unit Installation, AMM TASK 34-21-01-400-801.
5) For
the
applicable
ADIRU,
do
this
task:
ADIRS
BITE
Procedure,
34-21
TASK
801.
6) If the maintenance messages does not show on the CDU and the status code does not
show on the ISDU, then you corrected the fault.
(g) If you do not find a problem with the wiring, then do these steps and continue:
EFFECTIVITY SIL ALL 34-21 TASK 816
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details Page 233 Oct 15/2008
1) For the left ADIRU, re-connect the connector D3689 to the left pitot ADM. 2) For the right ADIRU, re-connect the connector D3695 to the right pitot ADM.
(3) Install a new ADIRU. To install it, do this task: Air Data Inertial Reference Unit Installation, AMM TASK 34-21-01-400-801.
(a) If the test in the installation task for the ADIRU is satisfactory, then you corrected the fault.
-------------------------END OF TASK ---------------------------
817. No Static ADM Data -Fault Isolation
A. Description
(1)
This task is for this maintenance message:
(a) 34-21028 NO STATIC ADM DATA
(2)
The maintenance message is identical for the left and right air data inertial reference systems (ADIRS). The left ADIRU maintenance message is shown on the ADIRS L BITE page on the control display unit (CDU). The right ADIRU maintenance message is shown on the ADIRS R BITE page on the CDU.
(3)
This message shows when the ADIRU does not receive a valid signal from the static air data module (ADM).
(4)
This fault causes the status code 28 to show on the inertial system display unit (ISDU).
(5)
This fault causes the SPD flag to show on the airspeed indicator and the ALT flag to show on the altimeter indicator.
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