Cash-strapped Go First filed for bankruptcy in May, blaming "faulty" Pratt & Whitney engines for the grounding of about half its fleet.

Two banking sources said on Thursday the conglomerate has not submitted an expression of interest (EoI) - the first step towards making financial bids - for the airline or hinted at any plans to do so despite a company executive telling Reuters in May that the group had no plans to exit.

"They have not been in touch with banks for the last one month," said a banker with a state-run lender which has loaned money to Go First.

A third source involved in the insolvency process said while the law does not prohibit the Wadia Group from joining the process at a later stage, there was no current indication it would do so.

None of the sources wanted to be identified because they were not authorised to speak to the media. The Wadia Group did not immediately respond to a Reuters request for comment.

On Wednesday, Reuters reported Go First has received an EoI from power generation company Jindal Power. The absence of the Wadia Group from the process would limit choices for creditors to find qualified investors.

The Go First bankruptcy filing lists Central Bank of India, Bank of Baroda, IDBI Bank and Deutsche Bank among its creditors, to whom the carrier owes a total of 65.21 billion rupees ($784.60 million).

While the Wadia Group was initially keen to revive the airline, they have "completely gone silent now" since a "lot of things have changed on ground," one of the bankers said, referring to the legal proceedings.

Foreign aircraft lessors of Go First are locked in a tussle with the company after they were blocked from repossessing planes due to a moratorium imposed by Indian courts.

The Indian government amended its insolvency law earlier this month to exclude leased aircraft from assets that can be frozen, but it is yet to be determined whether the amended law would apply retrospectively to Go First.

(Reporting by Siddhi Nayak; Editing by Nivedita Bhattacharjee)

By Siddhi Nayak