Pratt & Whitney said it was installing fixes on engines for Airbus A320neo jetliners ordered by Qatar Airways after airline chief executive Akbar Al Baker threatened to cancel the engine order citing "a lot of problems".

"We have met with Mr Al Baker previously and explained that we have fixes for the issues he identified," a Pratt & Whitney spokesman said by email on Tuesday. "They are being installed in engines being built today and they will be in place prior to him receiving his engines."

The Gulf airline has ordered 50 A320neo-family aircraft and was originally due to take the first delivery in December, but rejected the jet due to what it called an engine problem. The first jet went last month to Lufthansa instead.

At the Singapore Airshow earlier on Tuesday, Al Baker said Qatar Airways would "not accept an aircraft with those engines unless they are very much corrected". -Reuters