The Latest: Boeing negotiating more than $6 bln in orders

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The Latest on the Farnborough International Airshow (all times local):

1:57 p.m.

An unidentified customer in China committed to buying 30 Boeing 737 airplanes, with a value of $3 billion for the order.

The order involves a mix of 737 MAX and next-generation 737 airplanes.

Boeing said it will work closely with the customer to finalize the deal. The order was announced on the second day of the air show at Farnborough, the biennial gathering for the aviation industry outside London.

1:51 p.m.

Boeing said it signed an agreement to sell 10 of its 737-MAX 7 airplanes to Kunming Airlines and is working to finalize the deal.

The "memorandum of understanding", if finalized, would mean that China-based Kunming would become the launch customer in China for the improved 737 MAX 7 airplane.

Kunming Airlines currently serves more than 40 cities across China by operating a fleet of eight 737-700s and 11 737-800s. Shenzhen Airlines is the major shareholder of Kunming Airlines.

1:48 p.m.

Boeing said that Air Lease Corp. ordered six 737-8 Max aircraft, with a total value of $660 million.

Three of the orders are new and three were previously attributed to an unidentified customer.

ALC is an aircraft leasing company based in Los Angeles, with customers worldwide. The company said it already has lease agreements in place with seven different airlines for 737-8 MAX aircraft starting in the fourth quarter of 2017. It also said it has the largest backlog of any Boeing customer, with 180 planes.

1:43 p.m.

Boeing said that the travel and tourism company TUI Group finalized an order for 10 737 MAX's and one 787-9 Dreamliner, valued at $1.4 billion.

The order includes an option for one additional 787-9. TUI Group now has three unfilled orders for 787-9s and 70 orders for the 737-MAX.

Also, TUI group committed to Boeing's GoldCare maintenance coverage for the 737 and 737-MAX fleet.

TUI Group operates six airlines, including TUIfly, Thomson, TUIfly Nordic, Jetairfly, Corsair and TUIfly Netherlands.