The CBI complaint alleged that the total business of HAL with Rolls Royce was around Rs 4,700 crore between 2000 to 2013.
It is alleged that Rolls Royce paid Rs 18 crore to Patni as "commercial advisor" in the 100 supply orders of Avon and Allison engines' spare parts to HAL between 2007-11, the bureau's FIR stated.
The CBI action came after a five-year-long inquiry conducted by it. The inquiry was initiated on the basis of a complaint from the defence ministry that had received a letter about the engagement of Patni and his company by Rolls Royce.
The ED will probe if these alleged corrupt practices led to the generation of slush funds which were laundered to create personal assets, the officials said.
It will also investigate if the integrity pact was violated and kick backs were generated, they said.
Rollys Royce, after registration of the CBI case, had said it will not tolerate business misconduct of any sort and it is committed to maintain high ethical standards.
"No one currently working for Rolls-Royce in India played any part in these energy deals.
"India is an important market for Rolls-Royce and the company has a valued workforce of skilled people in the country," a company spokesperson had said.
The CBI has charged that Patni was also engaged in direct contracts of Rolls Royce with ONGC and GAIL for the supply of spare parts.
Although contracts with ONGC and GAIL allowed services of an agent but it was mandatory to declare the name at the time of bidding, a condition violated by Rolls Royce, it said.
The company declared the name of its agent to the oil and gas sector behemoths in 2013, CBI alleged.
It is alleged that Roll Royce paid Rs 29.81 crore in 73 purchase orders from 2007 to 2011 for procurement of material and spare parts pertaining to the engines for ONGC, but the company declared it in 2013, it said.
Roll Royce also paid one million British pounds with regard to 68 purchase orders from GAIL for spare parts from 2007 to 2010, it said.
The company entered in an arrangement with Turbotech Energy Services International Pvt Ltd and another company, Infinity, also owned by Patni, to which extra commission was paid, but not declared to GAIL, the CBI said.
The total commission paid by Rolls Royce comes to the tune of Rs 28.09 crore during the period 2007-10 for supplies to GAIL, it alleged.
There was an alleged conspiracy by Rolls Royce Plc and its subsidiary Rolls Royce India Pvt Ltd to misrepresent the facts before HAL regarding the engagement of the agent in order to win contracts with the public sector unit with "deception", it said.
The Indian Marine Gas Turbine unit of the HAL provides support in areas of inspection, spare parts, maintenance, equipment overhaul and assembly for industrial and marine gas turbines under licence from reputed manufactures.
The unit provides overhaul and repair of Avon and Allison engines for ONGC and GAIL for which spare parts are supplied by the energy division of Rolls Royce, it said.
The contract between Rolls Royce Power Engineering Plc and HAL was signed in June 2007, which was valid till December 2011, to provide maintenance, repair and overhaul services for units owned by the GAIL and ONGC under above licence from Rolls Royce.
"The purchase order condition specifically mentioned that Rolls Royce is not supposed to appoint any agent in India to promote this contract and no commission is payable to such agent," the CBI FIR has alleged.
It is alleged that Rolls Royce violated the condition of purchase order and integrity pact by engaging Patni and his company as commercial advisor from 2007 to 2011, and paid a commission ranging from 10 per cent to 11.3 per cent for supply of spare parts for the Avon and Allison engines.
The commission amount comes to the tune of Rs 18.32 crore during the period from 2007 to 2011 for the 100 purchase order, the CBI FIR alleged.
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