(a)  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.
1) If the weather radar operational test passes, then you corrected the fault.
2) If the weather radar operational test does not pass, then continue.
(7) Replace the autothrottle microswitch, M1766 (M1767). These are the tasks: Switch Removal, AMM TASK 76-11-07-020-801-F00. Switch Installation, AMM TASK 76-11-07-400-801-F00,
(a)  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.
EFFECTIVITY SIL ALL  34-43 TASK 815 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 250 Feb 15/2011 

1) If the weather radar operational test passes, then you corrected the fault.
-------------------------END OF TASK ---------------------------
816. No Range Data From EFIS Control Panel -Fault Isolation
A. Description
(1)
This task is for these observed faults:

(a)
Tilt Code of "-4" EFIS -Left.

(b)
Tilt Code of "+4" EFIS -Right.

(2)
No range data is detected from the EFIS control panel by the weather radar receiver/transmitter.

B. Possible Causes
(1)
EFIS control panel, P7-1 (captain’s) or P7-2 (first officer’s).

(2)
DEU-1 (captain’s) or DEU-2 (first officer’s).

(3)
Wiring.

(4)
Weather radar receiver/transmitter, M101.

SIL 014, 015, 020
(5) 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, P18-2
Row Col Number Name
D 1 C01369 DISPLAY CAPT EFIS CONT PANEL
D 5 C01359 DISPLAY DEU 1 PRI

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
D 11 C01360 DISPLAY DEU 2 PRI
D 13 C00120 WEATHER RADAR RT

D. Related Data
(1)
(SSM 34-41-11).

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

E. Fault Isolation Procedure
(1) To
do
a
check
of
the
DEUs,
do
this
task:
CDS
BITE
Procedure,
31-62
TASK
801.

EFFECTIVITY

34-43 TASKS 815-816
SIL ALL
Page 251 D633A103-SIL Feb 15/2011

(a)  
If the CDS BITE test shows any faults for the LRUs that follow, then go to the fault isolation task for the applicable CDS maintenance message to correct the fault: 1) EFIS control panel

2) Weather radar
3) Display electronic unit.

(b)  
If the tilt code does not show on the display, then you corrected the fault.

(c)  
If the tilt codes shows, then continue.

(d)  
If the CDS BITE test does not show, any faults for the above LRUs, then continue.

(2)  Do this check of the wiring between the applicable DEU and the weather radar receiver/ transmitter:
(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 DEU, M1808 (DEU-1) or M1809 (DEU-2). To remove it, do this task: Display Electronic Unit Removal, AMM TASK 31-62-21-000-801.

(c)  
Do a wiring check between these pins on connector D189B of the weather radar receiver/ transmitter, in the forward equipment center, and connector D3973B (DEU-1) or D3975B (DEU-2) at the E3-1 shelf (WDM 34-41-11).
　
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