(6)
Wiring.
C. Circuit Breakers
(1) These are the primary circuit breakers related to the fault:
CAPT Electrical System Panel, P18-2
Row Col Number Name
A 6 C01017 FMCS CMPTR 1
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 10 C01361 DISPLAY DEU 1 HOLDUP
D 13 C00120 WEATHER RADAR RT
D 16 C01262 FMCS CMPTR 2
D. Related Data
(1) (SSM 34-41-11).
EFFECTIVITY
34-43 TASKS 809-810
SIL ALL
Page 239 D633A103-SIL Feb 15/2011
E. Initial Evaluation
(1)
Make sure the WXR switch on the captain’s EFIS control panel is selected.
(2)
Make sure the CONTROL PANEL switch on the instrument switching module is set to NORMAL.
(a)
If the MAP/WXR RANGE DISAGREE message does not show on the captain’s display, then there was an intermittent fault.
(b)
If the MAP/WXR RANGE DISAGREE message shows on the captain’s display, then do the Fault Isolation Procedure below.
F. Fault Isolation Procedure
(1) For
DEU-1,
do
this
task:
CDS
BITE
Procedure,
31-62
TASK
801.
Look for any of the maintenance messages related to the LRUs that follow:
(a)
EFIS control panel
(b)
Weather radar
(c)
Flight management computer
(d)
Display electronic unit
1) If any of the above maintenance messages show, then go to the FIM task for that message.
2) If the MAP/WXR RANGE DISAGREE message does not show on the captain’s display, then you corrected the fault.
3) If the MAP/WXR RANGE DISAGREE message shows on the captain’s display, then continue.
(2) Do this check of the wiring between the weather radar receiver/transmitter and the captain’s DEU-1:
(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-1, M1808. To move it, do this task: AMM TASK 31-62-21-000-801.
(c)
Do a wiring check between the weather radar receiver/transmitter connector D189B, and the captain’s DEU-1 connector D3973F (WDM 34-41-11).
D3973B D189B
pinC7 ------------------pinB3 pinD7 ------------------pinB4
(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 captain’s DEU-1, M1808. To install it, do this task: AMM TASK 31-62-21-400-801. 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 weather radar operational test passes, 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.
EFFECTIVITY SIL ALL 34-43 TASK 810
D633A103-SIL BOEING PROPRIETARY -Copyright # Unpublished Work -See title page for details Page 240 Feb 15/2011
2) Re-install the captain’s DEU-1, M1808. To install it, do this task: AMM TASK 31-62-21-400-801. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：737-600/700/800/900 FAULT ISOLATION MANUAL 故障隔離手冊 導航(158)
