The report of Comptroller and Auditor General (CAG) has said that the ministry entered into another contract for producing these tanks without ACs, rendering their fleet vulnerable to degradation of sensitive components.
CAG noted that key systems of the war machines like the missile-firing mechanism and thermal sights had deteriorated due to prolonged exposure to heat and dust. Most of these tanks are deployed in the Rajasthan desert.
CAG rejected the ministry's reply that its decision of not importing the tanks fitted with ACs was based on trials in which detrimental effects of prolonged exposure to heat and dust were not noticed and they came to light only after they were inducted.
"The ministry's reply is not factually correct. The trial team had already highlighted the instances of overheating of components noticed during field trials and recommended addition of ACs," the report said.
The ministry was of the view that Indian commanders preferred to operate the vehicles with open cupolas which will limit the effectiveness of these ACs.