It announced the need for stepped up inspections after liaising with authorities over a separate issue with the compressor on Trent 1000 Package C series engines.
In an update this morning, Rolls-Royce said: "The increased inspection frequency is driven by our further understanding of the durability of the Trent 1000 Package C compressor, a condition that we highlighted earlier this year".
Nine Air NZ planes are powered by an engine type the manufacturer says now requires more frequent maintenance checks than was initially directed.
As of 08:36 BST, Rolls-Royce's share price had given up 1.57 percent to 867.40p, underperforming the broader United Kingdom market, with the benchmark FTSE 100 index now standing 0.09 percent lower at 7,251.80 points. It said it would reprioritise its spending to mitigate the incremental cash costs and its guidance for free cash flow remained unchanged.
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Boeing said the 787 has safely flown more than 3.2 billion miles since entering commercial service in 2011.
General Electric engines used on some 787s are not affected.
Air New Zealand experienced turbine blade problems in planes on successive days last December and this led to accelerated repairs in Singapore for the engines and disruption to tens of thousands of passengers.
"Our team of technical experts and service engineers is working around the clock to ensure we return them to full service as soon as possible", he said.
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The warning by Rolls-Royce comes ahead of anticipated announcements by USA and European aviation regulators, who are expected to issue guidance to airlines as soon as Friday.
"We will be working closely with Boeing and affected airlines to minimise disruption wherever possible", Chief Executive Warren East said.
"We sincerely regret the disruption this will cause to our customers", CEO East said in a statement. The snag has led to unscheduled shop visits for dozens of Boeing's 787s at carriers including Virgin Atlantic and British Airways, costing Rolls-Royce more than £220m in charges previous year. Virgin has also leased three Airbus A330-200s to help cover its flying programme.
In a statement, Air New Zealand said there would be some impact to its worldwide schedule, however it could not say how many flights would be affected or when.
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In March, Rolls said the cash hit from the problem should hit a peak of £340 million in 2018 before falling in 2019.