Definition
A weight-and-balance calculation method used to determine the new gross weight and new center of gravity (CG) location after items are added to or taken from an aircraft. The procedure multiplies the added or removed weight by its arm (distance from the reference datum) to produce a moment, then combines that moment with the original aircraft moment to find the new CG.
Plain English
A way of figuring out how the airplane's total weight and balance point change when you put something on board or take something off. You work out how heavy the item is, where it sits in the aircraft, and then recalculate the new totals.
Context Anchor
Seen in aircraft weight-and-balance records, maintenance records, equipment changes, and preflight planning after an aircraft has been modified.
Why Pilots Care
Changes from weight addition or removal can push the center of gravity outside certified limits and affect stability, control, and performance.
Grounding Statement
Even a small permanent change inside the aircraft can move the airplane’s balance point enough to matter.
Intuition Check
Do not confuse this with normal loading for one flight, such as putting bags in the airplane or taking them out. In this FAA context, weight addition or removal means a change to the aircraft itself that affects its official weight-and-balance records.
Example Sentence 1
Before the flight, the pilot used the weight addition or removal method to recalculate the CG after loading two extra bags in the rear baggage compartment.
Example Sentence 2
Weight addition or removal forward of the datum requires recalculating the new center of gravity location before takeoff.