General Atomics Aeronautical Systems has completed the third and final lifetime full-scale fatigue testing program for the MQ-9B drone, totaling 120,000 operating hours to validate the airframe’s structural integrity.
General Atomics Aeronautical Systems (GA-ASI) conducted the full-scale fatigue (FSF) testing to support certification to the NATO STANAG 4671 standard. Each of the three aircraft lifetimes represents more than 40,000 flight hours of operation.
GA-ASI conducted the testing at Wichita State University’s National Institute for Aviation Research (NIAR) in Wichita, Kansas, from December 2022 through October 2025. The company used a production airframe purpose-built to support the test campaign.
The FSF testing subjects the airframe to repeated loading cycles that simulate operational stresses, including flight maneuvers, takeoffs, landings, and environmental conditions. This accelerated testing enables GA-ASI to predict the aircraft’s service life and identify potential failure modes.
David R. Alexander, president of GA-ASI, said, “The completion of our full-scale fatigue test validates years of GA-ASI design and analysis efforts. The first two lifetimes simulated the operation of the aircraft under normal conditions, and the third intentionally inflicted damage to the airframe’s critical components to demonstrate its ability to tolerate operational damage that could occur over the lifetime of the aircraft.”
The testing aims to identify potential structural deficiencies ahead of fleet usage and assist in developing inspection and maintenance schedules. Test results will be used as documentation for certification and will form the basis for in-service inspections of structural components.
The NATO STANAG 4671 standard provides a framework for certifying unmanned aircraft systems operating in non-segregated airspace. The certification will enable the MQ-9B to operate alongside manned aircraft in civil airspace.
The MQ-9B is GA-ASI’s latest remotely piloted aircraft (RPA), or drone, and includes the SkyGuardian and SeaGuardian models. The company has procurement contracts for the MQ-9B with Belgium, Canada, Japan, Taiwan, Poland, India, Denmark, and the US Air Force in support of Special Operations Command.
GA-ASI is currently delivering the Protector RG Mk1 variant of the MQ-9B to the UK’s Royal Air Force (RAF). The MQ-9B has also been featured in various US Navy exercises, including Northern Edge, Integrated Battle Problem, RIMPAC, and Group Sail.
