SANDPOINT - Quest Aircraft Co. is fighting a lawsuit filed by a Canadian charter service which claims the company failed to build a plane to its specifications.

Quest denies the allegations made by Superior Airways and counterclaims that the charter company balked on its payment obligations and made demands not covered by the sales contract.

Superior filed suit in November and Quest filed its response the following month, according to 1st District Court records. Both parties are claiming breach of contract.

Superior Airways, based in Red Lake, Ontario, entered into an sales agreement with Quest in 2006 to purchase a Kodiak single-engine turboprop airplane capable of carrying nine people, a pilot and luggage, Superior's civil complaint said.

Superior paid Quest a $50,000 deposit and made a $500,000 payment in 2010 at Quest's request, but learned that the plane could only accommodate seven passengers, the suit said. Superior further alleges that the Kodiak was not fitted with the radar altimeter, a required piece of equipment for charter aircraft in Canada.

Superior further argued in the complaint that the Kodiak cannot be certified for charter operations in Canada because pilots are required to train on a Level V flight simulator, something which Quest does not possess.

In its answer to the lawsuit, Quest contends the deposit is non-refundable and that Superior did not fulfill its payment obligations. Quest concedes it does not have a flight simulator, but said Canadian aviation officials certified the Kodiak in 2009.

Quest maintains Superior rejected delivery of the Kodiak in September. Quest said Superior was to be the first Canadian outfit to use the Kodiak, an aircraft designed for short takeoffs and landings, for off-airstrip operations.

Further proceedings in the case are pending.