New Delhi, Sep 2 - The Bell 430 helicopter that went missing Wednesday with Andhra Pradesh Chief Minister Y.S. Rajasekhara Reddy on board was not airworthy and was pulled out of the chief minister's use last year after the state purchased a new Italian chopper, civil aviation sources said.

The Andhra Pradesh Resident Commissioner here, Rajat Bhargava, was unable to explain why the chief minister chose to fly by an old chopper when he had a new one, Agusta AW 139, bought for Rs.58 crores.

The sources in the Directorate General of Civil Aviation (DGCA), the aviation regulator, told IANS that Bell 430 was not airworthy and its certificate of airworthiness had not been renewed for the last two years.

The new Italian chopper was put into service from November last year, the sources said.

Soon afterward, the Bell 430 was handed over to the Andhra Pradesh Aviation Corp for commercial operations. According to one official, the police in Andhra Pradesh were now using the chopper.