A professional who examines airframe, engines, and operating equipment to ensure that repairs are made according to specifications, and certifies airworthiness of aircraft. Respnsibilities include:

• Tests tightness of airframe connections with handtools and employs flashlight and mirror to inspect fit of parts.
• Signals airframe-and-power-plant mechanic to start engine and manipulate aircraft controls.
• Collects data, such as engine revolutions per minute and fuel and oil pressures, to evaluate engine performance, using tachometer and pressure gauges.
• Examines assembly, installation, and adjustment of ailerons and rudders to ensure that work and materials conform with Civil Air Regulations, company specifications, and manual procedures.
• Determines accuracy of installation of components in power plant and hydraulic system with protractor, micrometer, calipers, and gauge to ensure that specified tolerances are met.
• Signs inspection tag to approve unit, or records reasons for rejecting unit.
• Logs inspections performed on aircraft.
• Must hold Airframe and Power Plant Mechanic's License and Inspection Authorization, issued by Federal Aviation Administration.
• May prepare dismantling schedules for airplanes to be overhauled.
• May service, repair, and replace airframe components, engines, and operating equipment.