Civil Aviation Minister Praful Patel Wednesday said institutional mechanisms were in place to check corruption, even as MPs cried foul over the aircraft purchase deals of the two state-run carriers.

"Aircraft purchase has been institutionalised. There are checks and balances," Patel told reporters here.

He, however, said there was enough time to correct any "wrongs" as the Air-India deal to acquire 50 Boeing aircraft was still to be approved by the government.

Citing the example of Airbus, which won a deal to supply 43 airplanes to Indian Airlines last year after trying for four years, Patel said deals like this do not come through overnight.

But he said he was "willing to abide by any advice anyone might have to improve the system".

Patel also said Air-India's decision to go for Boeing aircraft was neither based on geo-political consideration nor did the ministry direct it to do so. "I can assure you that it was a purely techno-economic consideration."

A group of MPs had written to Prime Minister Manmohan Singh, questioning the validity of the deals. But the civil aviation ministry is yet to get any communication from the Prime Minister's Office.