The Australian operation of Tiger Airways is in disarray following the resignation of its chief executive.
The airline's domestic services were grounded on 2 July for a week over safety concerns. Now the Civil Aviation Safety Authority says it will apply for an extension until 1 August.
Tiger has since issued a short statement saying that chief executive Crawford Rix will leave the airline on 31 July.
The airline also said it would not oppose an extension of the ban, but it remains committed to getting back into the air as soon as possible.
Tiger Airways is partially owned by Singapore Airways. It began operations in Australia on November 2007.