(Reuters) - Deutsche Lufthansa
The provisional order, which can only be completed when Boeing formally decides to build the proposed 406-seat twinjet, includes both firm orders and options, they said on Wednesday.
One of the people said the deal penciled in firm orders for 20 aircraft, with options making up the remaining 14.
If confirmed, the core part of the order could be worth $7 billion, based on estimates of the list price of the enhanced 777-9X, whose new wings and engines are expected to fetch a premium over Boeing's largest existing twinjet, the 777-300ER.
Industry sources have said the renewal of Lufthansa's long-haul fleet is also likely to include an order for 20-25 Airbus
Lufthansa and Boeing declined to comment ahead of a news conference called by the airline for Thursday.
(Reporting by Alwyn Scott, Tim Hepher; Editing by Maria Sheahan)