Definition
The maximum allowable gross weight and the forward and aft center-of-gravity (CG) limits established by the airplane manufacturer and published in the Pilot's Operating Handbook (POH) or Airplane Flight Manual (AFM). In the context of spin procedures, these limitations define the loading conditions under which the airplane's spin and recovery characteristics have been demonstrated and certified; loading outside these limits, particularly aft of the rearward CG limit, can make a spin unrecoverable.
Plain English
The rules from the manufacturer about how heavy the airplane can be and where that weight can be placed inside it. If the airplane is loaded outside these rules, it may not behave the way the handbook describes — and during a spin, that can mean the recovery techniques no longer work.
Context Anchor
Seen during preflight planning, loading calculations, and in the airplane’s operating handbook. In spin training, the airplane must be loaded within these limits before any approved spin practice.
Derivation
“Weight” comes from an old word meaning heaviness. “Balance” comes from the idea of a scale with two sides in proper relation. In aviation, that helps because safe loading is not only about total heaviness; it is also about where that heaviness is positioned in the airplane.
Why Pilots Care
An airplane loaded outside these limits may enter a spin that cannot be recovered, especially during intentional spin training.
Intuition Check
Do not read “limitations” as recommendations; they are operating limits. Do not read “balance” as the airplane sitting level on the ground; here it means the load is positioned within the approved range.
Example Sentence 1
Before practicing spins, the instructor and student calculated the weight and balance to confirm the airplane was within the utility category weight and balance limitations.
Example Sentence 2
Loading an aft baggage compartment pushed the center of gravity beyond the published limit and made spin recovery impossible.