Singapore Airlines has grounded two Boeing Co 787-10 jets after experiencing problems with Rolls-Royce engines after checks found premature blade deterioration.
The jets have been removed from service pending engine replacement, the airline said in a statement, but added: "As a result, some flights to destinations served by the 787-10 fleet have been affected".
The Trent 1000 TEN is the latest version of an engine that has had problems.
Rolls-Royce said it told "operators that the high-pressure turbine blades in these engines would have a limited life cycle" but that tests showed "a small number of these engines need to have their blades replaced earlier than scheduled".
By the end of last month 35 787s had been grounded globally due to engine blades corroding or cracking prematurely.
The manufacturer said it was aiming to reduce the number to 10 by the end of the year.