The Snowy Mountains Airport Corporation (SMAC) distributed a statement accusing Regional Express (Rex) of deceiving the public on its reasons for terminating its Sydney-Cooma air service.

The statement said that senior Rex officials had ongoing negative attitudes towards SMAC.

"SMAC was summoned to a meeting at Rex headquarters in Sydney on May 2... (and) at that meeting Rex demanded that the manager of Snowy Mountains Airport be sacked," the statement said.

"No valid or satisfactory reason for this request was provided by Rex.

"When SMAC refused to dismiss its manager, rex advised that they were cancelling all services to the Snowy Mountains (and) at no time in this meeting did Rex refer to their pilot shortage... for the cancellation of services.

A Rex spokesperson said the company would not enter the debate and reiterated that the service cancellation was due to a lack of pilots.

"The company is not at liberty to give details of internal deliberations other than to reiterate that the pilot shortage is the primary reason for the withdrawal from the Cooma to Sydney route."

Although Rex would not comment on its relationship with SMAC a Sydney-based aircraft captain, Warwick Brown, who has no connection with Rex, said if the airport management treated Rex the same as they treated him when he flew into the airport last year, he was not surprised they left.

Mr Brown wrote a letter to a Cooma associate last year complaining about the airport's management's behaviour to the flight crew and passenger on the flight.

"It is the opinion of our crew and passenger the Cooma airport management's behaviour exhibited an attitude and presentation that was not only unprofessional but totally unacceptable. This behaviour is contrary to the interests of any airport operation... which desires to promote their services," the letter said.

Mr Brown said told the Express he wrote the letter to give SMAC owners an insight of how flight crews and passengers were treated at the airport.