The Boeing 7J7 was a short- to medium-range airliner proposed by the United States aircraft manufacturer Boeing in the 1980s. It would have carried 150 passengers and was touted as the successor to the successful Boeing 727. It was initially planned to enter service in 1992. This was intended as a highly fuel-efficient aircraft employing new technologies, but it was cancelled when the price of oil dropped during the 1980s.
The 7J7 was planned to include advanced technology and electronics, such as a fly-by-wire flight control system, glass cockpit, and two General Electric GE36 UDF rear-mounted advanced technology contra-rotating unducted fan (propfan) engines.
The sum of all these features promised better fuel consumption by more than 60% compared to any existing large passenger aircraft technology at the time. "Efficiency" was the key theme. The 7J7 was to have a twin-aisle (2+2+2) seating configuration, giving an unprecedented wide and spacious cabin for its class, with no passenger more than one seat from an aisle.
It was also unprecedented in its foreign content with Japan having 25% industrial workshare. Potential customers were concerned about the economics and noise of the unproven propfan engines. Boeing cancelled the 7J7 in 1987 and instead concentrated its resources on further developments of the Boeing 737 and the Boeing 757.
The project's cancellation (as disappointing as it was to the Japanese aviation industry signaled a new era of cooperation between Boeing and Japanese suppliers. Japanese companies contributed significantly larger percentages of subsequent Boeing projects (about 15% of the Boeing 767 and 25% of the Boeing 777.
Japanese industry continues to be a primary foreign partner on the Boeing 787 Dreamliner.