Highly-placed sources said today some clarifications are needed from Rao on alleged non-fulfillment of conditions given in the supply contract.
The sources said orders for sanctioning the visit of the team headed by Superintendent of Police have been issued and the team might fly by next week to London to record the evidence.
"Airbus is cooperating with the investigation and cannot say more at this time," Justin Dubon, Head of Global News at Airbus, had told PTI last week.
CBI had registered a case against French company Airbus Industries and seven officials who held senior positions in Indian Airlines which was later merged with Air India.
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The sources said the then officials, including Deputy Managing Director, Director (planning), Director (finance), Functional Director (engineering), General Manager (engineering) and two Deputy General Managers one of whom is now posted in the vigilance wing, are accused in the case.
The agency had concluded its preliminary enquiry in the matter in 2012 and sought the permission of the Civil Aviation Ministry to prosecute the officials in the case which was given only in 2013, CBI sources said.