In its report tabled in Lok Sabha, the Comptroller and Auditor General (CAG) said IAF procured 17 engines in 2007 and 100 engines in 2009 for the Antonv-32 transport fleet.
"IAF had paid USD 719,500 (Rs 3.16 crore) per engine against the contract of June 2007, whereas, it had to pay USD 10,90,000 (Rs 5.43 crore) per engine against the contract of December 2009. Thus, IAF had to incur a total of Rs 227 crore extra on procurement of 100 aero-engines," it said.
An-32 is a medium tactical transport aircraft used primarily by the Air Force for transportation of the troops and cargo, para-trooping and casualty evacuation.
India had signed a contract with Ukraine for upgrading the fleet of 105 aircraft of which 40 were to be developed in Ukraine and the remaining were to be modernised in IAF facilities in Kanpur.
"Due to delay in initiation and conclusion of the contract, facilities for upgradation of an aircraft could not be set up in time despite an investment of Rs 272 crore on Transfer of Technology resulting in grounding of more than 50 per cent of the transport aircraft fleet," he said.