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Refer to figure or CAP 696 file 4.12. 
The ZFM of an aeroplane is equal to 48 000 kg and the CG position is at 25 % MAC. Which one of the statements below is correct ?

  • A
    The index at ZFM is outside the allowed CG range.
  • B
    A ZFM of 48 000 kg is not allowed for this aircraft type.
  • C
    The graph does not provide enough information to assess compliance with the CG limit.
  • D
    The index at ZFM is within limits and in an aft position.
Refer to figure.
The Load/Trim sheet is in two parts:
  • Part A (to the left) is a loading summary which is divided in 3 sections:
  1. Section 1 is used to establish the limiting take-off mass, the maximum allowable traffic load and the underload before last minute changes (LMC).
  2. Section 2 shows the distribution of the traffic load.
  3. Section 3 is used to summarise load and cross check that limits have not been exceeded.
  • Part B (to the right) is the trim portion, which helps to establish the CG %MAC and ensure that it lies within the envelope:
  1. Using the data given, start by drawing a horizontal line from the ZFM 48 000 kg.
  2. The intersection between the horizontal line and the 25% MAC line is the ZFM CG position, which is within limits.
  3. To find the index at ZFM draw a line vertically upwards from the ZFM CG position to read 72.
As seen from the figure, the index at ZFM is within limits and in an aft position.

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