6.4 Weighing procedure
The airplane is weighed standing on main wheels – all tyres must
have the correct size and pressure. All operating fluids must be
filled to the normal volume with only useable fuel remaining.
Movable ballast must be removed during this weighing procedure.
Place a levelling tool on the front part of the canopy frame.
Add thin sheets of plywood between front tyre and scale to level
the airplane horizontally, to zero degrees on levelling tool on the
canopy frame.
The reference plane (datum) is defined on the leading edge of the
wing, where wing and fuselage connect.
Lower a plumb-line from this point and mark the floor to obtain
the reference line.
The following values have to be measured:
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