Air Seychelles will retire its single B767-300ER S7-FCS by the end of April and then use A320-200s and A330-200s wet-leased from parent Etihad Airways for its routes from Mahé Seychelles International to Abu Dhabi International ,Johannesburg Oliver Reginald Tambo International and Mauritius Sir Seewoosagur Ramgoolam International until it takes delivery of its own A330-200s next year.