New Delhi, Sept. 23 -- The Supreme Court on Monday sought replies from the Union government and the Directorate General of Civil Aviation (DGCA), asking them to respond on how they propose to ensure a "free, fair, impartial and expeditious" investigation into the Air India plane crash that killed 260 people in June, and the need for a court-monitored probe by an independent investigator. A bench of justices Surya Kant and N Kotiswar Singh issued notices to the Centre and DGCA, seeking their responses in two weeks on a petition moved by NGO and aviation consultant Safety Matters Foundation. The court also described as "unfortunate" the public release of a preliminary report by DGCA that appeared to imply that one of the pilots could be at fa...