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Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801

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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 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.
EFFECTIVITY SIL ALL  34-43 TASK 802 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 212 Jun 15/2010 

SIL 014, 015, 020
(2) Replace the Left (Right) weather radar receiver/transmitter, M101 (M460).
These are the tasks:

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Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801

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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 weather radar operational test passes, then you corrected the fault. 2) If the weather radar operational test does not pass, then continue.
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(3) Do a visual check of the waveguide assemblies.
(a)  
Make sure the waveguide connection to the antenna drive assembly is attached correctly.

(b)  
Examine the waveguide for damage, dirt and moisture.

(c)  
If you find a problem with the waveguide assemblies, then do these steps:

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WXR Waveguide Removal, AMM TASK 34-43-21-000-801

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WXR Waveguide Installation, AMM TASK 34-43-21-400-801

(d)  
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.
-------------------------END OF TASK ---------------------------
803. Weather Radar Antenna Problem -Fault Isolation
A. Description
(1) The weather radar operational test shows an antenna fault.
B. Possible Causes
(1)
Weather radar antenna drive unit, M1209.

(2)
Weather radar receiver/transmitter, M101.

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

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C 7 C01678 WEATHER RADAR RT RIGHT
EFFECTIVITY

34-43 TASKS 802-803
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Page 213 D633A103-SIL Jun 15/2010

F/O Electrical System Panel, P6-1
Row Col Number Name

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D 13 C00120 WEATHER RADAR RT
D.  Related Data
(1)
(SSM 34-41-11).

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

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 maintenance message does not show, then there was an intermittent fault.

(b)
If the maintenance message shows, then do the Fault Isolation Procedure below.

F. Fault Isolation Procedure
SIL 004-021, 101-999
NOTE: Invalid or no data from the radio altimeter system, or the air data system, or the inertial reference system, will generate the AUTOTILT fail annunciation. The loss of inertial reference unit data will also generate the WXR ATT fault message. If the entire bus has missing data, the PWS FAIL fault will accompany the AUTOTILT FAIL message.
　
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