Diamond Aircraft DV 20 KATANA, Maintenance Manual

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AIRCRAFT
Leveling and Weighing DV 20 KATANA AMM
Page 2
15 Dec 2018
08-00-00
Doc # 4.02.02
Rev. 13
3. Weighing
The weighing may be performed using mechanical or electrical scales. The scale manufacturers' guide
lines must be observed.
Preparations to be made before every weighing:
)
Check that the equipment is complete and installed in the correct positions according to the
equipment list.
)
Clean and dry the airplane, and remove foreign objects such as tools, baggage, etc.
)
Drain fuel tank down to the unusable fuel quantity (2 liters / 0.5 US gal.).
)
Fill engine operating fluids (including coolant) up to the maximum markings.
)
Position all control surfaces in neutral positions.
After these preparations the airplane is placed on three scales. When rolling the main wheels onto the
scales, ensure that the landing gear struts do not distort the scales which would result in inaccurate
weighing. The nose wheel must be aligned to the rear, and must be centered on the scale.
NOTE: Two scales of exactly the same height must be used for the two main wheels.
After that, the airplane must be horizontally aligned (leveled) using a level. As mentioned previously,
a template is placed on top of the fuselage tube.
NOTE: The weighing should be performed in a closed room to prevent weighing error due
to the influence of wind.
After the canopy is closed, the mass (weight) portions can be read off the scales and recorded in the
Weighing Report (see Fig. 1). The net mass (weight) is calculated by subtracting the tare mass
(weight) - e.g. chock blocks - from the gross mass (weight).
Additional information regarding the center of gravity calculations can be found in the Airplane Flight
Manual.