Boeing said last month that as an outcome of the nuclear agreement, it had received a license from the United States government to conduct planning discussions with Iran about an aircraft fleet, a step meant to assess Iran’s needs before any negotiations for purchases.

Reached for comment about Mr. Akhondi’s statement, a spokesman for Boeing, John Dern, declined to specify whether those planning discussions had even begun, but he said “any engagement we have with the Iranians will be limited to the license.”

A separate license from the United States government would be required for Boeing to sell aircraft to Iran.

Iranian officials have moved aggressively since the nuclear agreement took effect to acquire new aircraft, projecting that they will need at least 500 planes in the next decade to replace and expand their existing fleet. They have so far signed deals for more than 200 planes with three Western manufacturers, half of them under a contract with Boeing’s chief rival, Airbus, that European news reports said could be worth as much as $25 billion.

Of the roughly 280 planes flown by more than a dozen airlines in Iran, including some aging Boeing 747s, many have been grounded because of mechanical and other issues, aviation industry analysts have said. The average age of Iran’s commercial airplanes exceeds 20 years and many are considered dangerously outdated — partly a legacy of the Western sanctions that severely limited Iran’s ability to replenish and maintain its civilian fleet.