MUMBAI: India’s grounded Jet Airways said on Tuesday that its chief executive and its finance chief have quit, adding to gloom over the ailing carrier. The heavily indebted airline, which last month suspended all operations, said that chief executive Vinay Dube resigned due to "personal reasons". Jet, with debts of more than $1 billion, has been in a tailspin for months, defaulting on loans and failing to pay many staff and aircraft leases.