Finnair is wet leasing a Boeing 767 and 787 to temporarily replace one of its Airbus 330 aircraft, which is undergoing extra maintenance.

Spanish operator Privilege Style will operate Boeing 767 Helsinki-New York JFK service from June 20 until the end of the month. LOT Polish Airlines plans to operate the route with the 787 from July 1-16.

Finnair’s A330 is expected to return to service after mid-July.

“One widebody aircraft missing from our fleet affects our operations … As this is a wet-lease agreement, all crew members are from Privilege Style and LOT, but in the cabin there’s one Finnair purser available,” COO Ville Iho said in a statement.