Crew chief becomes senior NCO Published Dec. 7, 2009 GRISSOM AIR RESERVE BASE, Ind., -- Brig. Gen. Dean Despinoy, 434th Air Refueling Wing commander, left, and Chief Master Sgt. Larry Brady, right, present a certificate to Master Sgt. Jason Drewitz , a KC-135R Stratotanker crew chief with the 434th Maintenance Squadron, recognizing his induction into the Senior NCO ranks. (U.S. Air Force photo/Tech. Sgt. Doug Hays)