Perth airport has launched court action against the Qantas group over around A$11.3m it owes in unpaid aeronautical charges. The airport says that despite 18 months of negotiations with Qantas, the two parties were unable to reach a new pricing agreement to replace the one that expired on 1 July this year. Since then, it has invoiced the carrier at the proposed reduced rate, but says that Qantas “unilaterally decided to short pay these invoices by around 40%”, between July and October, amassing a debt of A$11.3m, which is “not sustainable” for the airport. “Perth Airport has made numerous attempts to negotiate an outcome with Qantas, but these have failed to resolve the issue,” the airport adds. It adds that there will be no impact on passengers or the airline’s operations at the airport, but warns that the dispute could have implications for its expansion plans if not resolved. Qantas claims that the airport's invoices were for higher fees and charges, and its domestic chief executive says that payments are still taking place, "just not at the unjustified rates they have proposed." "We are willing to pay fair and reasonable charges but want to ensure that our customers are not paying more in airport charges than is absolutely necessary," he adds.<br/>