The Assistant Partial Program Manager (Maintenance) Part 121 serves as a full assistant to a Partial Program Manager (Maintenance) Part 121 who is assigned a portion of the airworthiness program performing inspections, surveillance, and certification duties for air carriers, air operators, air agencies, airmen, and designees. Experience involving the maintenance and repair of airframes, power plants, and systems of multi-engine aircraft of more than 12,500 pounds maximum certificated takeoff weight maintained under an airworthiness maintenance and inspection program.