The 339th Flight Test Squadron is a United States Air Force unit based at Robins Air Force Base, Georgia. It is part of the Warner Robins Air Logistics Center, with a mission to certify aircraft as worthy to return to service. The squadron is responsible for conducting flight tests on the Lockheed C-130 Hercules, the Lockheed C-5 Galaxy and McDonnell Douglas F-15 Eagle after program depot maintenance is completed.