Barron's | SIA Engineering Slips on Disappointing Q1 Earnings; Buying Opportunity? Barron's Shares in aircraft maintenance provider SIA Engineering (S59.SG) have skidded 5% this week, but that could be a buying opportunity. SIA, which is majority owned by Singapore Airlines, traded about 1% lower still in Singapore Wednesday morning after ... SIA Engineering's net profit crashes 81.8% to $36.2m |