18 / 20

Refer to Annex-031-014.
An aeroplane, whose specific data is shown in the annex, has a planned take-off mass of 200 000 kg, with its centre of gravity (C.G.) is located at 15.38 m rearward of the reference point, representing a C.G. location at 30% MAC (Mean Aerodynamic Cord). For performance purposes, the captain decides to reset the value of the centre of gravity location to 35% MAC.

The front and rear cargo compartments are located at a distance of 15 m and 25 m from the reference point respectively, the cargo load mass which needs to be transferred from the front to the rear cargo compartment is:

  • A
    4 600 kg
  • B
    5 600 kg
  • C
    3 600 kg
  • D
    It is not possible to establish the required centre of gravity location.

Distance between holds = 10m

The length of the MAC = 4.6m

CG change = 5% x 4.6m = 0.23m

Now use the formula:

Change in Mass / Total Mass = Change in CG / Total Distance Moved

Transpose formula:

Change in Mass = (Change in CG x Total Mass) / Total Distance Moved

Change in Mass = (0.23 x 200000) / 10

Change in Mass = 4600 kg

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • Poland
    3
  • Lithuania
    2
  • Bulgaria
    1
  • Iceland
    1
  • Ireland
    1
  • Norway
    1
Keyboard Shortcut Use Keyboard Shortcuts