(h)
Remove the alignment clamp.
(i)
Connect the cable to the electrical connector (8) of the sensor.
S 414-116
(5) Install the faceplate on the protective cover.
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S 864-167
(6) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P414 Power Distribution Center - Left
1) 414K20 WT & BAL
(b)
P415 Power Distribution Center - Right
1) 415G21 WBS CHB ALT
F. Automatic Zero Adjustment (Mode 38)
NOTE: Use this adjustment procedure at these times:
____
-
After replacement of only one sensor on the body landing gear.
-
After replacement of only one sensor on the wing landing gear.
-
After replacement of one sensor on the body landing gear and one sensor on the wing landing gear.
S 864-118
(1)
Make sure the engines are off.
S 864-144
(2)
Supply electrical power (AMM 24-22-00/201).
S 824-119
(3)
Use WBC mode 38 to adjust the replaced sensor to zero:
(a)
Open the keyboard cover on the front of the WBC.
(b)
Push the MODE key.
(c)
Use the keyboard to put in 38.
__
(d)
Push the ENTER key.
(e)
When OK shows, push the YES key.
(f)
When 1A REPLACED shows, push the right or left arrow key until the identification number of the replaced sensor shows (Table 1 shows the sensor identification numbers).
NOTE: If ENGINE ON shows, the zero adjustment cannot be done
____ with mode 38. To use mode 38 the engines must be off and the EIU circuit breakers must be closed.
(g)
Push the ENTER key.
(h)
When OK? XXX REPLACED shows, make sure that the display shows the identification number of the replaced sensor. 1) If the sensor number (XXX) is correct, push the YES key. 2) If the sensor number (XXX) is not correct, push the NO key
to start mode 38 again.
(i)
Make sure CAL IN PROGRESS shows momentarily.
(j)
Make sure PROCESS COMPLETE shows.
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(k) Close the WBC keyboard cover.
G. Zero Adjustment on Jacks (Mode 99)
NOTE: Use this adjustment procedure at these times:
____
-
After replacement of more than one sensor on the body landing gear.
-
After replacement of more than one sensor on the wing landing gear.
S 584-120
(1)
Lift the airplane on jacks to remove all weight from the main landing gear (AMM 07-11-01/201).
S 824-121
(2)
Use WBC modes 22 and 99 to adjust the replaced sensors to zero:
(a)
Open the keyboard cover on the front of the WBC.
(b)
Push the MODE key.
(c)
Use the keyboard to put in 22.
__
(d)
Push the ENTER key.
(e)
When OK shows, push the YES key.
(f)
Push the right or left arrow key until the identification number of the replaced sensor shows (Table 1 shows the sensor identification numbers).
(g)
Make a record of the value that shows on the right side of the display.
(h)
Do steps (f) and (g) again for each replaced sensor.
(i)
Push the RESET key.
(j)
Push the MODE key.
(k)
Use the keyboard to put in 99.
__
(l)
Push the ENTER key.
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本文链接地址：747-400 AMM 飞机维护手册 指示/记录系统 1(124)
