Plain English Meaning

Composite aircraft usually have to be painted in light colors because dark paint gets too hot in the sun and can damage the structure underneath.

Full Definition

A restriction on the exterior paint scheme of composite aircraft, generally limiting owners to lighter colors (typically white or near-white) to prevent the airframe from absorbing excess solar heat. Dark colors can raise surface temperatures high enough to weaken or distort the resin matrix that holds the composite structure together.

Context Anchor

Seen when inspecting, repairing, or repainting composite aircraft surfaces, especially in manufacturer instructions or aircraft limitations.

Why Pilots Care

Choosing a non-allowable dark color can raise surface temperatures enough to soften the resin matrix and reduce .