(b)  
Remove the left LRRA, M1735. To remove it, do this task: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Removal, AMM TASK 34-33-21-000-801.

(c)  
Do a wiring check between these pins on connector D189B of the weather radar receiver/ transmitter, in the forward equipment center, and on connector D3667B of the low range radio altimeter, at the E3-1 shelf (WDM 34-33-11).

D3667B  D189B
pinG2 ------------------pinC1 pinG3 ------------------pinC2

(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 LRRA, M1735. To install it, do this task: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Installation, AMM TASK 34-33-21-400-801.
EFFECTIVITY SIL ALL  34-43 TASK 807 
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details  Page 230 Feb 15/2011 

4)  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 you corrected the fault.
(e)  If you do not find a problem with the wiring, then continue.
1)  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.
2)  Re-install the left LRRA, M1735. To install it, do this task: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Installation, AMM TASK 34-33-21-400-801.
SIL 014, 015, 020
(4)  Do this check of the wiring between the left LRRA and the Left (Right) weather radar receiver/ transmitter, applicable to tilt code ‘‘-2’’:
(a)  
Remove the Left (Right) weather radar receiver/transmitter, M101 (M460). To remove it, do this task: Weather Radar Receiver/Transmitter Removal, AMM TASK 34-43-41-000-801.

(b)  
Remove the left LRRA, M1735. To remove it, do this task: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Removal, AMM TASK 34-33-21-000-801.

(c)  
Do a wiring check between these pins on connector D189B (D673B) of the Left (Right) weather radar receiver/transmitter, in the forward equipment center, and on connector D3667B of the low range radio altimeter, at the E3-1 shelf (WDM 34-33-11), (WDM 34-33-21).

D3667B  D189B
pinG2 ------------------pinC1 pinG3 ------------------pinC2
D3667B  D673B
pinG2 ------------------pinA5 pinG3 ------------------pinA6

(d)  
If you find a problem with the wiring, then do these steps: 1) Repair the wiring. 2) 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. 3) Re-install the left LRRA, M1735. To install it, do this task: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Installation, AMM TASK 34-33-21-400-801. 4) Do this task: Weather Radar (WXR) System -Operational Test, AMM TASK 34-43-00-710-802-001. a) If the tilt code does not show, then you corrected the fault.

(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 left LRRA, M1735. To install it, do this task: Low Range Radio Altimeter (LRRA) Receiver/Transmitter (R/T) Installation, AMM TASK 34-33-21-400-801.
　
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