Intrepid Aviation, the largest creditor of Skymark Airlines Inc., has approached Delta Air Lines Inc. about cooperating on rehabilitating the bankrupt Japanese carrier, a Delta source said Friday.

Intrepid has opposed a Skymark rehabilitation plan that would tap ANA Holdings Inc. as a rehabilitation sponsor, and presented to a Tokyo court its own plan indicating cooperation with other firms.

Intrepid, a U.S. aircraft leasing firm, is believed to have also approached other airlines about helping Skymark.

The company, which accounts for more than one-third of claims to Skymark, reportedly mounted opposition to ANA Holdings' support for Skymark after its leasing negotiations with the ANA group failed to yield a deal.