Its hard to run an airline in the Congo and the country has been to hell and back in he last century. Needless to say not many Congolese airlines have been successful or garnered much respect. For a while Hewa Bora appeared to be an exception and they were one of the few African airlines to have operated the Tristar:
Hewa Bora Airways Lockheed L-1011 Tristar 500 by rstretton, on Flickr
Hewa Bora Airways Lockheed L-1011 Tristar 500 by rstretton, on Flickr