2) When EXIT MODE 99? shows, push the NO key. Display shows ( EDIT) (CAL RES?) 3) When the display shows EDIT CAL RES?, push the YES key.
Display shows (CRES 1) (+ yy.yy)Put in the Resistance values from Figure 513: 1) When the display shows CRES 1 +yy.yy, put in the Resistance
value for load sensor 1 from Figure 513.
a) At this point (before you key-in any numbers) you can use the arrow keys to increment the display to a different sensor (CRES 1,2,...,18R).
b) When the correct Resistance value shows, push the ENTER key. Display shows (OK? 1) (+xx.xx )
NOTE: Make sure you have a decimal point somewhere in
____
the value.
2) When the display shows OK? 1 +xx.xx, make sure the value is correct, and then push the YES key. Display shows (DONE? 1) (+xx.xx )
3) When the display shows DONE? 1 +xx.xx, push the NO key to go to the subsequent sensor. Display increments to show (CRES 2,...,18R) (+ yy.yy) a) For each of the other sensors repeat the steps to
Put in the Resistance values from Figure 513.
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747-400 MAINTENANCE MANUAL
(h) Save the data in memory:
1) After you put in all the Resistance values, when the display shows DONE? 18R +xx.xx, push the YES key. Display shows (WRITE IN) (PROGRESS) for 8 seconds, then it shows (EXIT ) (MODE 99?)
2) When EXIT MODE 99? shows, push the YES key. Display shows (PROCESS ) (COMPLETE) for 8 seconds.
S. Calibration Check (Compare Mode-01 data with Scales Data) (Figure 514)
S 415-096
(1) Connect the truck positioning actuators on the wing landing gear (AMM 32-11-20/401).
S 865-112
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL
_______ SURFACES, THE THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(2)
Pressurize hydraulic systems 1 and 4 (AMM 29-11-00/201).
S 865-109
(3)
Start WBC mode-01:
(a)
Push the MODE key.
(b)
Push the 0 key and then the 1 key.
(c)
Push the ENTER key.
(d)
When OK? UNITS=LB shows, push the YES key.
NOTE: The gross weight shows on the left side of the display.
____ The center of gravity shows on the right side.
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(4)
Collect the first set of data:
(a)
Read the gross weight in pounds and the center of gravity (CG) with WBC mode 01 and write the data in Figure 514, in the WBC MODE 01 column and the SAMPLE 1 row.
(b)
Calculate the gross weight in pounds from the scales and write the data in Figure 514, in the SCALES column and the SAMPLE 1 row.
(5)
Stop for a minimum of one minute.
S 975-115
(6)
Collect the second set of data:
S 865-069
(a) Read the gross weight and center of gravity with WBC mode 01 and write the data in Figure 514, in the WBC MODE 01 column and the SAMPLE 2 row.
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747-400 MAINTENANCE MANUAL
(b) Calculate the gross weight from the scales and write the data in Figure 514, in the SCALES column and the row SAMPLE 2 row.
S 865-071
(7)
Stop for a minimum of one minute.
S 975-072
(8)
Collect the third set of data:
(a)
Read the gross weight and center of gravity with WBC mode 01 and write the data in Figure 514, in the WBC MODE 01 column and the SAMPLE 3 row.
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