Air Tanzania appears still to be trying to free an Airbus A220 which was held in Johannesburg following a service from Dar es Salaam.
Tanzania's ministry of transport stated that the aircraft failed to make return service because, according to the country's ambassador to South Africa, the high court in Gauteng ordered the flight cancelled.
There is no indication that the A220 – registered 5H-TCH, one of pair used by the airline – has flown since arriving in Johannesburg on 23 August.
The Tanzanian government says its attorney general's office is investigating the situation.
Air Tanzania has informed its passengers that its flight schedules have been changed owing to "reasons beyond our control".
Local reports from Tanzania suggest the dispute centres on a historic compensation issue relating to farmland.