May be required to perform such additional duties as structural fire fighting, aircraft fire/crash/rescue duty, serve as security guard, remove snow, load and handle munitions, launch/recover and service of aircraft, operate heavy equipment, maintain facilities and equipment, or serves as a member of a team to cope with natural disasters or civil emergencies. Jacks aircraft to simulate flight configuration, connects power sources, and uses cockpit controls, gauges, and additional precision instruments to check the operation of such items as landing gear doors, ground and flight spoilers and steering and brake systems for performance and conformance to operating specifications.