S 745-116
(5)
Push the TEST button on the RDDU.
(a)
Make sure the RDDU display shows 888.8 for WT and 88.8 for CG.
(b)
Make sure the TIP and INOP indicators come on.
(6)
Remove electrical power if it is not necessary (AMM 24-22-00/201).
S 865-103
TASK 31-41-00-825-023
6. Weight and Balance System - Nose Gear Sensor - Calibration
__________________________________________________________
A. General
(1) Use this procedure to calibrate the weight and balance system for the nose gear sensors whenever the In-Axle-Mount rings are replaced.
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(2)
During the calibration procedure you will collect data, calculate calibration data, and put the calibration data into the calibration module. You will also make a written record of the calibration data.
(3)
You will collect three sets of data from the scales and the WBC.
(a) You will collect wheel weights from the scales and sensor counts from the WBC. Each time you read the weight on a wheel, you must read the counts for the adjacent load sensor at the same time.
NOTE: Wheel weights must be recorded in pounds (lbs.).
____
NOTE: Counts are values retrieved from the 16-bit A to D
____ converter in the WBC. Counts have a range of 0 to 65535.
(4)
From the zero values and the three sets of data you will calculate the span and offset values for each load sensor.
(5)
You will use the WBC to read the load sensor resistance values. (The WBC uses resistance data to correct for temperature variation.)
(6)
You will use the WBC to put this data into the calibration module:
(a)
The calculated span and offset values.
(b)
The load sensor resistance values.
(7)
You will make a written record of the calibration data.
B. Standard Tools and Equipment
(1) Airplane Scales that can measure individual wheel weights
C. References
(1)
AMM 07-11-03/201, Jack Airplane Axles
(2)
AMM 09-11-00/201, Towing
(3)
AMM 12-15-03/301, Wing Landing Gear Shock Strut Servicing
(4)
AMM 12-15-04/301, Body Landing Gear Shock Strut Servicing
(5)
AMM 12-15-05/301, Nose Landing Gear Shock Strut Servicing
(6)
AMM 24-22-00/201, Manual Control (Apply Power)
(7)
AMM 27-51-00/201, Trailing Edge Flap System
(8)
AMM 27-81-00/201, Leading Edge Flap System
(9)
AMM 28-26-00/201, Defueling
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D. Access
(1) Location Zones
118 Electrical and Electronics Compartment, RH
715 Nose Landing Gear
735 Wing Landing Gear, LH
745 Wing Landing Gear, RH
755 Body Landing Gear, LH
765 Body Landing Gear, RH
E. Prepare the Scales and the Airplane
NOTE: The wind must be less than 20 knots when you weigh the airplane.
____ S 865-024
(1)
Defuel the airplane until the total fuel quantity is less than 10,000 pounds (4,536 kilograms) (AMM 28-26-00/201).
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