Applicants for a mechanic certificate with a single rating—either airframe or powerplant—and who base their application on practical experience must demonstrate 18 months of work experience applicable to the chosen rating. Those applying for both ratings must show a total of 30 months of applicable experience.
Applications based on education Applicants who attend an aviation maintenance school program certificated under Part 147 study an FAA-approved and supervised curriculum. Those applying for a mechanic certificate with a single rating—either airframe or powerplant—study a "general" set of subjects for at least 400 hours, as well as at least 750 hours of material appropriate to the chosen rating, for a total of 1,150 hours. Those who pursue both ratings study the "general" material, as well as the 750 hours for each rating, for a total of at least 1,900 hours. Completion of such a program of study typically requires between 18 and 24 months. Required areas of study in the "general" curriculum include electricity,
technical drawings,
weight and balance,
hydraulics and
pneumatics, ground operation of aircraft, cleaning and corrosion control, basic mathematical calculations, forms and record-keeping, basic
physics, maintenance manuals and publications, and applicable federal regulations. Thorough knowledge of FAA rules and regulations (especially with regard to accepted repair/modification procedures) is also expected of A&P mechanics. Required areas of study in the airframe curriculum include inspection, structures—wood,
sheet metal,
composite—and fasteners, covering, finishes,
welding, assembly and rigging, hydraulics, pneumatics, cabin atmosphere control systems, instrument systems, communication and navigation systems, fuel systems, electrical systems, position and warning systems, ice and rain control systems, and fire protection systems. Required areas of study in the powerplant curriculum include inspection, reciprocating and turbine engine theory and repair, instrument systems, fire protection systems, electrical systems, lubrication systems, ignition and starting systems, fuel metering systems, fuel systems, induction and airflow systems, cooling systems, exhaust and reverser systems, propellers, unducted fans, and auxiliary power units. == Inspection authorization ==