Martin Kingston resigned as a director of South African Airways on Friday as the state-owned airline’s administrator scrambles for cash to keep it going.

“There is no need for me to be on the board given the appointment of the Business Rescue Practioners,” Kingston, the executive chairman of Rothschild & Co.’s South African unit, said in a text message. “I will continue to offer input to the extent required.”

The loss-making carrier has been under voluntary business rescue, a local form of bankruptcy protection, since December as the administrator tries to nurse the company back to health. Finance Minister Tito Mboweni on Thursday said that National Treasury and the Department of Public Enterprises are trying to find additional funding for the airline.

SAA has not received 2 billion rand ($138 million) from Treasury that is needed to keep the carrier operational, Business Day reported on Thursday, citing the airline’s administrator. It may suspend flights if it doesn’t receive the money by Sunday, the Johannesburg-based newspaper said.