Air India’s new CEO, Tewolde Gebremariam, is drawing on his experience revitalising Ethiopian Airlines to turn around the unprofitable Indian carrier, as aviation analysts say replicating his success with a far more complex airline would be difficult. Barely a month into the job, the Ethiopian has set about cutting costs and rebalancing the airline’s international network, seeking to restore profitability while pursuing an ambitious expansion strategy. His plans include shifting more flights to...