(2)
Wiring.

(3)  
Weather radar receiver/transmitter, M101.

SIL 014, 015, 020
(4)  Left (Right) Weather radar receiver/transmitter, M101 (M460).
SIL ALL
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

CAPT Electrical System Panel, P18-3
Row Col Number Name

SIL 014, 015, 020
C 7 C01678 WEATHER RADAR RT RIGHT
F/O Electrical System Panel, P6-1
Row Col Number Name

SIL ALL
C 14 C01008 ADIRU RIGHT AC
C 15 C00426 ADIRU RIGHT EXC
C 17 C01010 ADIRU RIGHT DC
D 13 C00120 WEATHER RADAR RT

D.  Related Data
(1)
(SSM 34-41-11).

(2)
(WDM 34-41-11).

(3)
(WDM 34-21-13).

(4)
(WDM 34-21-23).

(5)
(WDM 34-21-14).

(6)
(WDM 34-21-24).

EFFECTIVITY SIL ALL  34-43 TASK 806 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 224 Feb 15/2011 

E.  Initial Evaluation
(1)  Do this task: Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-802-001 or Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-803-002.
(a)  
If the weather radar operational test passes, then there was an intermittent fault.

(b)  
If WXR FAIL ATT shows, then do the Fault Isolation Procedure below.

F.  Fault Isolation Procedure
(1)  
Do
this
task:
ADIRS
BITE
Procedure,
34-21
TASK
801.

(a)  
If you find CURRENT STATUS faults, then do these steps: 1) Do the FIM tasks for the maintenance messages that you find. 2) Do this task: Weather Radar (WXR) System -Operational Test, AMM

TASK 34-43-00-710-802-001 or Weather Radar (WXR) System -Operational Test,
AMM TASK 34-43-00-710-803-002.
a) If the weather radar operational test passes, then you corrected the fault.
b) If WXR FAIL ATT shows, then continue.

(b)  
If you do not find any CURRENT STATUS faults, then continue.

(2)  
Do this check of the wiring between the left ADIRU and the weather radar receiver/transmitter, applicable to tilt codes ‘‘-1’’ and ‘‘-3’’:

(a)  
Remove the weather radar receiver/transmitter, M101. To remove it, do this task: Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801.

(b)  
Remove the left ADIRU, M1749. To remove it, do this task: Air Data Inertial Reference Unit Removal, AMM TASK 34-21-01-000-801.

(c)  
Do a wiring check between these pins on connector D189B weather radar receiver/ transmitter, at the forward equipment center, and on connector D3687B of the left ADIRU, at the E5-2 shelf (WDM 34-21-13).

D3687B  D189B
pinC10 -----------------pinJ11 pinC11 -----------------pinJ12
D3687A  D189B
pinA9 ------------------pinK11 pinB9 ------------------pinK12

(d)  If you find a problem with the wiring, then do these steps: 1) Repair the wiring. 2) Re-install the weather radar receiver/transmitter, M101. To install it, do this task:
Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
3)  Re-install the left ADIRU, M1749. To install it, do this task: Air Data Inertial Reference Unit Installation, AMM TASK 34-21-01-400-801.
4)  Do this task: Weather Radar (WXR) System -Operational Test, AMM
　
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