Multi-beam method and apparatus for removing and replacing major structural components while converting an airplane to efficiently carry freight

US6257522A · kind A · utility

Assignee

• The Boeing Company · US

Inventors

• John D. Friend · Towanda, US
• Michael Swank · Warsaw, US
• David B. Hime · Wichita, US
• Jack M. Whitney · Wichita, US
• Michael J. Wieland · Wichita, US
• Arthur W. Burden · Augusta, US
• Daniel J. Johnson · Blaine, US
• Velma C. Keyser · Wichita, US
• Bruce A. Chappell · Wichita, US

Key dates

• Filing date: Jul 15, 1999
• Grant date: Jul 10, 2001
• Expiry date: Jul 15, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64F5/60
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method of removing and reinstalling multiple floor-beams concurrently while minimizing aircraft movement. The airplane is supported with jacks in a manner that minimizes internal shear and bending moment stresses. All floor-beams needing to be replaced are removed concurrently. All floor-attach structure such as floor panels, intercostals, seat-tracks, hard points, cargo handling equipment, and electrical and hydraulic standoffs is also removed. Deformation of the airplane is monitored and any significant deformation is restored. A floor-beam complex consisting of floor-beams, and all floor-attach structure such as floor panels, intercostals, seat tracks, hard points, cargo-handling equipment, and electrical and hydraulic standoffs is installed in place of the removed floor structure. The floor-beam complex has splices to facilitate handling during installation. More than one floor-beam complex may be required for a complete airplane. A special lifting tool is utilized to load the floor beam complex into the airplane.