The DO-28 aircraft family is a very rugged group of aircraft. The Do-28A has O-540 250hp engines and can carry 4 pax at the back. The DO28B has IO540K 290hp engines and can carry 6 pax at the back. The DO-28D has TIO-540 engines (I think 350hp) and can carry 10-11 pax. All of these aircraft are easy to fly and maintain all you need is oil and fuel, the perfect bush aircraft. However, I believe that these days parts are not as easy to obtain, also none of these aircraft has radar. This leaves the DO-228 which is a turboprop. The 228 are also great aircraft to fly and are not to bad with maintance, don't know the current situation with part.