(Adds prices, quotes, detail)     FARNBOROUGH, England, July 15 (Reuters) - Boeing  
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    announced a 26-plane deal with lessor Air Lease Corp on Tuesday including six of the wide-body 777-300ER model and 20 of the smaller 737 MAX 8.     Air Lease Corp chairman and chief executive Steven Udvar-Hazy said the company had already lined up three airlines to take the six 777-300ER jets.     The 777-300ER is an "Extended Range" version of the 777 with seating for up to 386 passengers and a range of 7,825 nautical miles (14,490 kilometres).       The deal, which has a list price value of $3.9 billion, takes Udvar-Hazy's career orders of the 777 to 100 and boosts Air Lease's intake of the 737 MAX to 104.     Air Lease on Monday selected GE's  
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    GEnx-1B engines to power 30 Boeing 787 Dreamliner aircraft it has on order in a deal worth more than $1.4 billion at list prices.     "We look forward to expanding that portfolio," Udvar-Hazy said regarding the Boeing 787 models he has on order.     He said Air Lease officials had recently taken a test flight aboard a 787-9.     "It's a huge step change," he told reporters at the air show. "It's even better than the (787)-8."   (Reporting by Jason Neely; Editing by Mark Potter)  ((jason.neely@thomsonreuters.com)(0207 542 8825)(Reuters Messaging: jason.neely.reuters.com@reuters.net))  Keywords: AIRSHOW BRITAIN/BOEING AIRLEASE