Section 6 – Weight and Balance
WEIGHING PROCEDURES
2. WEIGHING PROCEDURES
2.1. PREPARATION
- Carry out weighing procedure inside closed hangar
- Remove from cabin any object unintentionally left
- Make sure Flight Manual and mandatory documents are on board
- Align nose wheel
- Drain fuel via the specific drain valve
- Oil and hydraulic fluid at the operating levels
- Move sliding seats to most forward position
- Raise flaps to fully retracted position
- Place control surfaces in neutral position
- Place scales (min. capacity 300 kg (661.4 lb)) under each wheel
2.2. LEVELLING
- Level the aircraft (the reference for longitudinal levelling is made putting a
spirit-level on the cabin floor as shown in the Aircraft Maintenance Manual).
- Adjust longitudinal attitude deflating nose tire
2.3. WEIGHING
- Record weight shown on each scale
- Repeat weighing procedure three times
- Calculate empty weight
2.4. DETERMINATION OF C.G. LOCATION
- Drop a plumb bob tangent to the wing leading edge and trace a reference mark
on the floor (see Figure on Para. 2.5 or 2.6)
- Repeat the operation for other wing
- Stretch a taught line between the two marks
- Measure the distance between the reference line and both main and nose wheel
axis (A and B distances respectively)
- Using recorded data it is possible to determine the aircraft C.G. location and the
aircraft moment (see following table)
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