InvestmentsTop Global NewsMarketsReal Estate SilkAir order for 31 Boeing 737 MAX planes still ‘intact’, says Singapore Airlines By financialnews_rlv83x - May 17, 2019 0 315 SIA says SilkAir would only resume 737 MAX flights after the aircraft is certified safe not just by Singapore, but by aviation authorities of countries that SilkAir flies to.