777 Automated Spar Assembly Tool - Second Generation

Paper #:
  • 952172

Published:
  • 1995-09-01
Citation:
Brisben, S. and Knapp, J., "777 Automated Spar Assembly Tool - Second Generation," SAE Technical Paper 952172, 1995, https://doi.org/10.4271/952172.
Pages:
8
Abstract:
The Automated Spar Assembly Tool (ASAT II) at the Everett, Washington, 777 Boeing manufacturing facility could be the largest automated fastening cell in the commercial aircraft industry. Based on the success of the ASAT I, Boeing's 767 spar assembly tool, the 285-foot long ASAT II cell was needed to accurately position and fasten the major spar components (chords and web), then locate and fasten over 100 components (ribposts and stiffeners) to assemble the 777 forward and rear wing spars. From its inception in 1990 to the first drilled hole in January 1993 and through two years of spar production, the more advanced ASAT II has proven to be a greater success than even its 767 ASAT I predecessor. This massive automated fastening system consistently provides accurate hole preparation, inspection, and installation of three fastener types ranging from 3/16 inches to 7/16 inches in diameter.
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