(e)  
If you do not find a problem with the wiring, then continue.

1)  Re-install the Left (Right) weather radar receiver/transmitter, M101 (M460). To install it, do this task: Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
2)  Re-install the air/ground relay, R589.
SIL ALL
(4) Replace the weather radar receiver/transmitter, M101. These are the tasks: Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801, Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
EFFECTIVITY SIL ALL  34-43 TASK 819 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 260 Feb 15/2011 

(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 tilt code does not show then you corrected the fault.
SIL 014, 015, 020
(5) Replace the Left (Right) weather radar receiver/transmitter, M101 (M460). These are the tasks: Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801, Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
(a)  Do this task: Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-802-001.
1) If the tilt code does not show then you corrected the fault.
SIL ALL
-------------------------END OF TASK ---------------------------
820. No Aural Warnings (PWS) -Fault Isolation
A.  Description
(1)  No Aural Warnings are detected over the flight deck speakers during PWS Warnings or Cautions.
B.  Possible Causes
(1)  
Remote Electronic Unit (REU), M1353.

(2)  
Autothrottle microswitch assembly, M1766 (left) or M1767 (right).

(3)  
Weather radar receiver/transmitter, M101.

SIL 014, 015, 020
(4)  Left (Right) Weather radar receiver/transmitter, M101 (M460).
SIL ALL
(5) Wiring.
C.  Circuit Breakers
(1)  These are the primary circuit breakers related to the fault:
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 13 C00120 WEATHER RADAR RT
D.  Related Data
(1) (SSM 34-41-11), .
EFFECTIVITY

34-43 TASKS 819-820
SIL ALL
Page 261 D633A103-SIL 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 tilt code does not show then there was an intermittent fault.

(b)  
If the tilt code shows then do the Fault Isolation Procedure below.

(2)  
To
do
a
check
of
the
DEUs,
M1808
(M1809),
do
this
task:
CDS
BITE
Procedure,
31-62
TASK
801.

(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) Weather radar
2) Display electronic unit.

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

F. Fault Isolation Procedure
(1) Replace the Remote Electronic Unit, M1353.
These are the tasks:
Remote Electronics Unit (REU) Removal, AMM TASK 23-51-01-000-801,
Remote Electronics Unit (REU) Installation, AMM TASK 23-51-01-000-802.
　
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