Air Canada said it has achieved labour stability after its largest union joined four others in approving new 21-month contracts.

The International Association of Machinists and Aerospace Workers, which represents about 11,000 mechanics and baggage handlers, announced yesterday that 60 per cent of its members voted in favour of the deal, after initially rejecting the contract by 50.8 per cent.

Contract approvals by mechanics, pilots, flight attendants, customer agents and dispatchers have been considered a critical factor in keeping the airline out of bankruptcy court.