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According to the applicable operational requirements, which one of the following statements is correct regarding the weighing and re-weighing procedure of an aircraft?
  • A
    Weighing wet aircraft is permitted.
  • B
    Weighing should be accomplished in an enclosed building.
  • C
    Weighing must be performed prior to every flight.
  • D
    Weighing must be systematically carried out whenever a modification is applied on the aircraft.
  • EASA AIR OPS - CAT.POL.MAB.100 Mass and balance, loading:

(b) The operator shall establish the mass and the CG of any aircraft by actual weighing prior to initial entry into service and thereafter at intervals of four years if individual aircraft masses are used, or nine years if fleet masses are used. The accumulated effects of modifications and repairs on the mass and balance shall be accounted for and properly documented. Aircraft shall be reweighed if the effect of modifications on the mass and balance is not accurately known.

  • EASA AIR OPS - AMC1 CAT.POL.MAB.100(b) Mass and balance, loading:

(c) When weighing an aircraft, normal precautions should be taken consistent with good practices such as:

(1) checking for completeness of the aircraft and equipment;
(2) determining that fluids are properly accounted for;
(3) ensuring that the aircraft is clean; and
(4) ensuring that weighing is accomplished in an enclosed building.

The operator must also account for and document the accumulated effects of modifications and repairs between weighings, by either weighing the equipment added or removed, or by using standard masses. It must re-weighed, only if the accumulated effects of these modifications lead to a change of the DOM by more than 0.5% of the MLM or the CG shifts by more than 0.5% of the MAC.

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