The U.S. Air Force has renewed a contract with a Mississippi aerospace company to supply parts and maintain training jets.

Vertex Aerospace said Monday that the $97.5 million contract covers more than 170 twin-engine T-1A Jayhawk planes used in advanced flight training by the military.

Vertex says it has managed parts and maintenance services for the training jets since 1992. Vertex says it services the jets at military bases in Mississippi, Oklahoma, Texas and Florida.

Based in Madison, Vertex overhauls and distributes parts for military aircraft and ground vehicles.

Private equity firm American Industrial Partners of New York bought Vertex in July from L3 Technologies for $540 million.

Vertex has more than 1,000 employees in Mississippi. Worldwide, Vertex has 4,200 workers with yearly revenue of $1.42 billion.