The Samoa Observer reported CEO Seiuli Alvin Tuala told them last week to seek answers from the prime minister regarding the lease cost.
This was after Tuilaepa told the newspaper to ask Seiuli if they wanted to know the exact amount of the lease, rumoured to be US$500,000 a fortnight.
The CEO was quoted saying he did not wish to comment and that it would be best to ask the prime minister.
Questions from the Samoa Observer were emailed and sent in a letter but have not garnered any response.
The plane is on lease from Iceland Air.