Sgt. Joshua C. Cowan, an AV-8B Harrier powerline mechanic with Marine Attack Squadron 542, inspects a Harrier May 21. Cowan received the VMA-542 Maintenance Marine of the Year award during a ceremony at the Twin Rivers Theater aboard Cherry Point May 13. - Sgt. Joshua C. Cowan, an AV-8B Harrier powerline mechanic with Marine Attack Squadron 542, inspects a Harrier May 21. Cowan received the VMA-542 Maintenance Marine of the Year award during a ceremony at the Twin Rivers Theater aboard Cherry Point May 13.