Definition
A change in the location of an aircraft's center of gravity (CG) caused by moving people, fuel, baggage, or cargo from one position to another within the aircraft. Weight shifting alters the CG position without changing the total weight, and is used either intentionally to bring the CG within limits or as a calculation to predict the effect of a planned movement of load.
Plain English
Moving people or items inside the aircraft to change where the airplane balances, without changing how much it weighs in total.
Context Anchor
Used in weight-and-balance planning when a pilot corrects the aircraft’s balance by moving passengers, baggage, or equipment instead of adding or removing weight.
Derivation
Combines 'weight' (force due to gravity acting on mass) with 'shifting' (changing position). The combination emphasizes that moving mass alters the aircraft's balance point rather than simply changing total weight.
Why Pilots Care
Uncontrolled weight shifting can move the center of gravity outside certified limits, reducing stability or making the aircraft difficult or impossible to control.
Intuition Check
Weight shifting does not mean the aircraft gets heavier or lighter. It means the same weight is moved to a new place, which moves the aircraft’s balance point.
Example Sentence 1
With the CG slightly aft of limits, the pilot resolved it by weight shifting two bags from the rear baggage compartment to the forward compartment.
Example Sentence 2
Before takeoff the crew secured all items to prevent weight shifting that could occur during turbulence.