Abu Dhabi: Etihad Airways chief Antonoaldo Neves has identified rising jet fuel costs as the biggest challenge facing airlines in 2027, warning that airfares could come under pressure from the second quarter as industry fuel hedging positions begin to run down.Get updated faster and for FREE: Download the Gulf News app now - simply click here.With fuel accounting for a substantial share of airline operating expenses, 35-40 per cent according to…