Equatorial Guinea's government has grounded all but one of the country's airline companies, state radio reports.
An Antonov plane crashed last July killing 60 on board
Their operating licences, including that of the national carrier, were revoked after aircraft inspections carried out by South African experts.
Correspondents say the move relates to last July's crash in Equatorial Guinea when an overcrowded passenger plane crashed, killing 60 people.
With only 3% of air traffic, Africa accounts for 27% of global accidents.
Meanwhile, a meeting of African airlines in Tunisia has produced a call for an expansion of air routes across the continent.
The head of the African Airlines Association, Christian Folly-Kossi, said there was a lack of services and called on African operators to work together to improve the situation.
The airline association highlighted what it said was the problem of European carriers dominating the skies over Africa.
It said it was intolerable that African passengers sometimes had to travel via Europe to reach a destination elsewhere in Africa.