Abstract: A support structure for an aircraft includes a structural member having a generally planar shape, a longitudinal axis defining a longitudinal direction and a transverse axis orthogonal to the longitudinal axis, and a plurality of rounded holes formed along the longitudinal direction. Each rounded hole has a respective major axis with a major length and a minor axis orthogonal to the major axis with a minor length that is less than the major length. Each rounded hole is oriented with its major axis rotated more than 0 degrees and less than 90 degrees from the longitudinal axis of the structural member. The structural member is configured for bearing external loads acting on the structural member in a principal loading direction that is not parallel with the longitudinal axis or the transverse axis. Each rounded hole may be oriented with its major axis aligned generally parallel with the principal loading direction.

Abstract: A support system for a crown area of an aircraft and a corresponding method is disclosed. The support system includes a crown integration panel (CIP). The CIP is configured to provide a mounting surface for a plurality of aircraft equipment and to provide an electrical ground for at least one of the aircraft equipment of the plurality of aircraft equipment. The system further includes a first attachment and a second attachment attached to the CIP. The first attachment and the second attachment are configured to attach to an airframe of the aircraft. The system further includes a crown raceway support (CRS) having a first end and a second end, where the first end is attached to a first end of the CIP and the second end is configured to attach to an outboard rail of the aircraft.

Abstract: A support system for a crown area of an aircraft and a corresponding method is disclosed. The support system includes a crown integration panel (CIP). The CIP is configured to provide a mounting surface for a plurality of aircraft equipment and to provide an electrical ground for at least one of the aircraft equipment of the plurality of aircraft equipment. The system further includes a first attachment and a second attachment attached to the CIP. The first attachment and the second attachment are configured to attach to an airframe of the aircraft. The system further includes a crown raceway support (CRS) having a first end and a second end, where the first end is attached to a first end of the CIP and the second end is configured to attach to an outboard rail of the aircraft.