The US Federal Aviation Administration (FAA) has lowered India's aviation safety ranking, finding regulatory oversight to be inadequate, in a move that would impede efforts by Airbr br India Ltd and Jet Airways (India) Ltd to expand flights to American destinations and subject them to stricter scrutiny.br br India's ranking has been downgraded to so-called category II from category I, said Prabhat Kumar, head of the Directorate General of Civil Aviation (DGCA), after meeting a FAA delegation that flew to New Delhi to inform Indian government officials about the decision by the US aviation regulator.