Investigation of Manual One Way Assembly on Primary Wingbox Structure 2002-01-2633

Methods of drilling, reaming and deburring of wingbox structures prior to bolting has remained similar from the A300 to the present A340 Airbus wing. This is with the exception of automated processes such as LVER (Low Voltage Electro-magnetic Riveting) equipment as utilised on A320/A340 stringer to wing skin assembly.

An opportunity exists to improve the existing working process with regard to rib to spar assembly, for current and future products and, in particular, A380. The automated LVER set up exploits a one way assembly (OWA) concept in that the joint is drilled, in some cases with wet (uncured) sealant interfay, and joint break down is omitted prior to fastener installation.

The proposed concept intends to change build method by implementing manual one way assembly (MOWA) using operator driven methods, and processes that do not employ automated techniques. Specific jig, clamp and drill sequences will be employed, with the aim of controlling the process to a higher degree, thus eliminate the need to separate joint and deburr. Removal of the deburring operation will have a positive effect on reducing cycle times and work in progress.