They are consider structural elements of the fuselage.
Will the airplane come apart just because it lifts off the ground with the covers removed? Not necessarily, but it will be flying with the strength of the fuselage compromised to some (unknown) level.
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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