LOS ANGELES--(BUSINESS WIRE)--Ducommun Incorporated (NYSE: DCO) today reported it has been named a Partner-level supplier for 2014 in the John Deere Achieving Excellence Program. This is the third consecutive year Ducommun has earned this recognition. The Partner-level status is Deere & Company’s highest supplier rating. Ducommun provides John Deere Electronic Solutions with complex, high-reliability printed circuit board assemblies and electronic systems used in equipment for the agricultu