Since adding its fourth Italian destination, Qatar Airways has been operating 42 weekly flights from Doha to Italy.
Rolls-Royce said that more regular inspections are required and would lead "to higher than previously guided cash costs being incurred during 2018".
American Airlines has ordered 47 Boeing 787 Dreamliners in a deal valued at $12 billion at list prices, while cancelling a major order for Airbus A350s.
Jet Airways, in a filing to the stock exchange late on Tuesday, did not say whether the agreement was a formal order or a non-binding memorandum of understanding.
Qatar Airways has congratulated its home and hub, Hamad International Airport (HIA), on being ranked fifth ‘Best Airport in the World’ at the Skytrax World Airport Awards 2018.
Domestic Indian passenger traffic increased by 17.9% in January from a year earlier, marking the 41st consecutive month of double-digit growth.
Being offered cash at the gate to take a later flight because of overbooking may become a rarity if technology being examined by major airlines such as British Airways, JetBlue and Qantas catches on.
Qatar Airways also highlighted its ultra-modern extra-wide body Airbus A350-900 at the event, which was attended by VIPs and other dignitaries.
Once the country's monopoly airline, Air India has slowly lost market share to new low-cost private players in one of the world's fastest-growing airline markets.