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747-400
MAINTENANCE MANUAL
SENSOR LOCATION SENSOR NO. m = --éXYV 2éVX é YVXVé é éV V 2éXV)(
LEFT FWD 17F
LEFT AFT 17R
RIGHT FWD 18F
RIGHT AFT 18R
NOSE LANDING GEAR
Spans
Figure 523
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F27032
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MAINTENANCE MANUAL
SENSOR LOCATION NO. SENSOR SENSb = -V+1 OR OFFSET (b) éYV méXV é
LEFT FWD 17F
LEFT AFT 17R
RIGHT FWD 18F
RIGHT AFT 18R
NOSE LANDING GEAR
Offsets
Figure 524
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F27033
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MAINTENANCE MANUAL
LOAD SENSOR NUMBER (mode 23) LOAD SENSOR RESISTANCE
17F
17R
18F
18R
Load Sensor Resistances
Figure 525
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747-400 MAINTENANCE MANUAL
(g)
Push the + key to get the resistance values for the other sensors.
(h)
Push the RESET key to stop this mode. (The WBC shows PROCESS ABORTED.)
O. Put Calibration Data into Calibration Module
S 975-058
(1) Use WBC mode 99 to put the load sensor zeros, spans, offsets, and resistances from Figures 516, 523, 524, and 525 into the calibration module:
(a) Start mode 99 on the WBC: 1) Push the MODE key. 2) Push the 9 key two times. 3) Push the ENTER key. 4) When OK? shows, push the YES key. 5) When ENTER CAL CODE shows, push the decimal point (.) key,
the 9 key, and then the MODE key. 6) Push the ENTER key. 7) When OK? .9M shows, push the YES key. 8) When ENTER 99 CODE shows, push the 7 key, the 4 key, and
the 7 key. 9) Push the ENTER key. 10) When OK? 747 shows, push the YES key.
(b) Put in the zero values from Figure 516: 1) When EDIT ZERO? shows, push the Yes key. 2) Use the + key to step to the ZERO 17F display. 3) Put in the zero value for load sensor 17F from Figure 516.
a) Use these keys to put in data: + - . 0-9
b) Use the left arrow key to erase incorrect data.
4) When the correct zero value shows, push the ENTER key.
5) When OK? shows, make sure the value is correct and then
push the YES key.
6) When DONE? shows, push the NO key to go to the subsequent
sensor.
7) Put in the zero value for each sensor.
8) When DONE? shows after you put in all the zero values,
push the YES key. (The WBC then shows WRITE IN PROGRESS for approximately 8 seconds.) 9) When EXIT MODE 99? shows, push the NO key.
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