Figure 6: Weighing Report for Mechanical Scales Under the Wheels
Page 12 Doc # 6.02.01
09 Jan 2003 Rev. 4

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Weighing and Levelling
AMM

DA 40 Series

Detail Steps/Work Items  Key Items/Reference 
(20)  Use the plumb line to mark the position of the nose wheel center line on the floor. 
(21)  Use the plumb line to mark the position of each main wheel center line on the floor. 
(22)  Lift the airplane off the scales with the jacks.  Refer to Section 07-10. 
(23)  Read the weight of the wooden blocks on each of the scales. Record the values in the column headed TARE in the Weighing Report. 
(24)  Remove the scales and the ramps. 
(25)  Measure the distance X1LH. Record the value in the Weighing Report. 
(26)  Measure the distance X1RH. Record the value in the Weighing Report. 
(27)  Measure the distance X2. Record the value in the Weighing Report. 
(28)  Refer to the calibration records for the weighing scales. If necessary, correct the Gross and Tare values of MAIN G1LH, MAIN G1RH, and NOSE G2. 
(29)  Subtract each Tare value from the related Gross value. Record the result under Net in the Weighing Report. 
(30)  Lower the airplane with the jacks. 
(31)  Calculate the Empty Weight, G, from the Net values.  G = Net G1LH + Net G1RH + Net G2 
(32)  Calculate the Empty Weight Moment, M.  M = (G1LH * X1LH)+( G1RH * X1RH) + (G2 * X2) 
(33)  Calculate the position of the Empty Weight Center-of-Gravity, XCG.  XCG = M/G 
(34)  Record the Empty Weight (G) and the Empty Weight Moment (M) in the Airplane Flight Manual. 

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AMM

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Weighing and Levelling
AMM

Section 08-20
Levelling

1. General
These procedures tell you how to make the airplane level. See Section 07-10 for lifting the airplane with jacks.
Make the airplane level with jacks unless you are weighing the airplane. If you weigh the airplane, change the airplane tire pressures or use blocks to make the airplane level (see Section 08-10).
2. Make the Airplane Level with Jacks
A. Equipment
Items  Quantity  Part Number 
Airplane jacks (600 kg / 1320 lb minimum lifting capacity).  3  Commercial 
Wing trestle.  2  Commercial 
Nose trestle.  1  Commercial 
Spirit level.  1  Commercial 
Wedge, slope 600:31 (2.96°).  1  Local Manufacture 

Doc # 6.02.01 Page 1
Rev. 4 09 Jan 2003

08-20-00
AMM

Figure 1: Level the Airplane Laterally
31 mm

Figure 2: Level the Airplane Longitudinally
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Weighing and Levelling
AMM

B. Level the Airplane with Jacks Procedure
DA 40 Series

Detail Steps/Work Items  Key Items/References 
Note: Level the airplane in a closed room. This will avoid any wind causing levelling errors. 
(1)  Lift the airplane on jacks.  Refer to Section 07-10. 
(2)  Make the airplane level laterally: S Put a spirit level on the horizontal surface of the baggage compartment frame. S Adjust the main jacks to bring the sprit level horizontal.  Refer to Figure 1. Behind the back seats. 
(3)  Make the airplane level longitudinally: S Place a wedge on the rear fuselage with the thin end forward. S Place a spirit level on the wedge. S Adjust the tail jack to bring the spirit level horizontal.  Refer to Figure 2. 
(4)  Put trestles under each wing and the front fuselage.  Refer to Section 07-10. 
　
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