BILLINGS FLYING SERVICE INC

Aircraft Engine and Engine Parts Manufacturing

This includes establishments primarily engaged in one or more of the following: (1) manufacturing aircraft engines and engine parts; (2) developing and making prototypes of aircraft engines and engine parts; (3) aircraft propulsion system conversion (i.e., major modifications to systems); and (4) aircraft propulsion systems overhaul and rebuilding (i.e., periodic restoration of aircraft propulsion system to original design specifications).

Nonscheduled Chartered Passenger Air Transportation

This includes establishments primarily engaged in providing air transportation of passengers or passengers and cargo with no regular routes and regular schedules.

Nonscheduled Chartered Freight Air Transportation

This includes establishments primarily engaged in providing air transportation of cargo without transporting passengers with no regular routes and regular schedules.