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G2 = Net weight - Main wheels (LH and RH)
G = Empty weight
XCG = Arm - Empty - weight (Calculated)
Figure 3: Weighing Dimensions
DA20-C1 AMM
Leveling And Weighing
Doc # DA201-C1
Rev. 0 08-10-00 Page 5
19 Dec 1997
B. Weighing
Detail Steps/Work Items Key Items
Note: Weigh the aircraft in a closed room. This will avoid any wind causing
weighing errors.
(1) Move the airplane onto the scales. The scales under the main wheels must be
the same.
Note: Make sure that each wheel is in the center of the weighing scale. If the wheel
is on the side of the scale the data can be wrong.
(2) Align the aircraft laterally:
− Open the canopy.
− Put the spirit level on the back rest of the
seat
− Adjust the level of the aircraft by placing
wooden blocks under the right-hand or
the left-hand main wheel. If required,
deflate a tire a small amount.
If necessary, use 2 packing blocks of equal
thickness to clear the safety belt
attachments.
(3) Align the aircraft longitudinally:
− Put the 1000:55.84 wedge on the
fuselage.
− Place the spirit level on the wedge.
To lower the nose, decrease the nose
wheel tire pressure a small amount.
To raise the nose, place a wood block
under the nose wheel.
(4) Remove the alignment equipment and close
the canopy.
(5) Read the weight off the scales.
(6) Calculate the net-weight:
− Subtract the tare-weight from the
gross-weight
(7) Record the data in the weighing report.
(8) For more data to calculate the center of
gravity. See the Flight Manual.
Leveling And Weighing
DA20-C1 AMM
Page 6
29 Apr 2004 08-10-00 Doc # DA201-C1
Rev. 9
Model: DA20-C1 Serial Number:___________ Registration_____________
Data with reference to the Type Certificate Data Sheet and the Flight Manual.
Reference Datum: Leading edge of wing at root rib.
Horizontal reference line: Wedge 1000:55.84, 2000mm (78.7 in) aft of the step in the cockpit rim.
Equipment list - dated:__________ Cause for Weighing:_________________________________
Weight and Balance Calculations
Weight Condition: Include brake fluid, engine oil and Unusable fuel 1.5 kg (3.31 lbs).
Finding Empty Weight: Finding Arm: (Measured)
Support Gross
(kg) (lbs)
Tare
(kg) (lbs)
Net
(kg) (lbs)
Lever Arm
(cm) (in)
Front G1 X1 =
Rear G2LH X2LH =
Rear G2RH X2RH =
EMPTY WEIGHT (G)
Finding Empty - Weight Center of Gravity (XCG):
Empty Weight CG Formula:
G2LH (X1 + X2LH) + G2RH (X1 + X2RH)
XCG = - X1
G1 + G2LH + G2RH
Finding Empty - Weight Moment
Empty-weight Moment (M) = Empty Weight (G) x Empty-weight CG (XCG)
Finding Maximum Permitted Useful Load:
Maximum Weight kg (lbs) 750 kg/1653 lbs (800 kg/1764 lbs US registered aircraft)
-Empty Weight kg (lbs)
= Maximum useful Load kg (lbs)
Record the Empty Weight (G) and the Empty-weight Moment (M) in Flight Manual.
Place / Date Authorizing Stamp Authorizing Signature
Figure 4: Weighing Report
DA20-C1 AMM
Leveling And Weighing
Doc # DA201-C1
Rev. 0 08-20-00 Page 1
19 Dec 1997
CHAPTER 08-20
LEVELLING
1. General
These procedures tell you how to make the aircraft level. See Chapter 07-10 for lifting the aircraft
with jacks.
You can make the aircraft level with jacks. Or you can make the aircraft level by changing the tire
pressures. Or you can put blocks under the wheels.
If you have to do an asymmetry test, use the jacks to make the aircraft level. If you weigh the
aircraft, change the aircraft tire pressures to make the aircraft level. Or you can put blocks under
the wheels to make the aircraft level.
2. Make The Aircraft Level With Jacks
A. Equipment
Items Quantity Part Number
Aircraft jacks 2 Commercial
Trestle 1 Commercial
Spirit level 1 Commercial
Wedge - Slope 1000:55.84 1 Local Manufacture
B. Procedure
Detail Steps/Work Items Key Items
(1) Lift the aircraft on jacks. Chapter 07-10
(2) Open the canopy.
Leveling And Weighing
DA20-C1 AMM
Page 2
19 Dec 1997 08-20-00 Doc # DA201-C1
Rev. 0
Figure 1: Level The Aircraft Laterally
Figure 2: Level The Aircraft Longitudinally
DA20-C1 AMM
Leveling And Weighing
Doc # DA201-C1
Rev. 0 08-20-00 Page 3
19 Dec 1997
Detail Steps/Work Items Key Items
(3) Align the aircraft laterally:
− Put the spirit level on the back rest of the
seat
− Adjust the level of the aircraft by raising
the jack on the low side.
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