2)  Look for any objects or dust that can stop the weather radar receiver/transmitter air flow. a) Remove the unwanted objects that stop the air flow.
3)  Re-install the weather/radar transmitter. To install it, do this task: Weather Radar Receiver/Transmitter Installation, AMM TASK 34-43-41-400-801.
(d)  
If the fan does not come one, then replace the weather radar receiver/transmitter mount, M1209. These are the tasks:

Weather Radar Receiver/Transmitter Mount Removal, AMM TASK 34-43-31-000-801, Weather Radar Receiver/Transmitter Mount Installation, AMM TASK 34-43-31-400-801.

(e)  
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.
(2) Replace the weather radar antenna drive, M1209.
These are the tasks:
Weather Radar Antenna Flat Plate Removal, AMM TASK 34-43-11-000-801,
Weather Radar Antenna Drive Unit Removal, AMM TASK 34-43-11-000-802.
Weather Radar Antenna Drive Unit Installation, AMM TASK 34-43-11-400-802,
Weather Radar Antenna Flat Plate Installation, AMM TASK 34-43-11-400-801.

(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.
(3) 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 815 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 249 Feb 15/2011 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 weather radar operational test passes, then you corrected the fault.
2) If the weather radar operational test does not pass, then continue.
SIL 014, 015, 020
(4) 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 weather radar operational test passes, then you corrected the fault. 2) If the weather radar operational test does not pass, then continue.
SIL ALL
(5) Replace the applicable ADIRU, M1749 (M1752). These are the tasks: Air Data Inertial Reference Unit Removal, AMM TASK 34-21-01-000-801, Air Data Inertial Reference Unit Installation, AMM TASK 34-21-01-400-801.
(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.
(6) Replace the low range radio altimeter (LRRA), M1735 (left LRRA) or M1736 (right LRRA). These are the tasks: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Removal, AMM
TASK 34-33-21-000-801,
Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Installation, AMM
TASK 34-33-21-400-801.
　
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