London - Technical problems at Rolls-Royce are putting pressure on Boeing and airline operators across the world. The British engine manufacturer wants to carry out further inspections for Trent 1000 engines in the C package already installed on B787 aircraft.

The checks will be made on 380 Trent 1000 turbines.

More frequent scrutiny is required to cope with an existing durability issue,
said Rolls-Royce after conducting some tests on the affected engines.

The US aircraft manufacturer said that about a quarter of the "Dreamliner" fleet needed to be inspected. The current production line is not affected.

By the end of March, Boeing has delivered 670 Dreamliners. In recent months, the 787-9s serving at the different airline operators had repeatedly to cancel flights.

British Airways, Virgin Atlantic, All Nippon Airways and Air New Zealand are a few who reported problems with the engine. Virgin Atlantic has now leased four Airbus A330-200s of former Air Berlin to bridge the gap in the absence of its 787-9s

In December, EASA issued an emergency airworthiness directive. Since then, engines with increased risk of failure may no longer be used in pairs on the same aircraft.

The financial damage is already huge. Quality issues cost Rolls-Royce $314 million last year alone. Fixing all the engines currently affected could take until 2022, the company said.