Pratt & Whitney has no engines currently available for India’s Go First airline, which also has no rights over them, the counsel for the U.S. firm told a Delaware court on Thursday as the two companies engaged in a raging dispute over the supplies.

The Indian airline has approached the Delaware court to enforce an arbitration order it won in Singapore against Pratt & Whitney, which it blames for its financial troubles and argues the U.S. firm failed to supply engines on time.

Pratt (RTX.N) says those claims are without merit. Go First has been granted bankruptcy protection in India with a court-appointed administrator trying to revive the airline.

This has also sparked a bitter tussle with many of Go First’s lessors as they have terminated their lease agreements and are trying to repossess the planes.