BOS further directed staff to proactively pursue innovation and sustainable opportunities to enhance the economic development potential of the airports, as they are capital assets to the county and an integrated transportation asset to the Bay Area region. Airline and destinations Current airline service JetSuiteX started commercial airline service on April 19, 2016, with Embraer 135 aircraft. Past airline service Buchanan Field had commuter airline flights to San Francisco International Airport from 1969 to 1979 on Stol Air Commuter Britten-Norman BN-2 Islanders and Britten-Norman BN-2A Trislanders. In 1969 San Francisco and Oakland Helicopter Airlines (also known as SFO Helicopter) scheduled Sikorsky S-61s nonstop to Oakland International Airport continuing to SFO, up to five flights a day. SFO Helicopter had left the airport by 1975. In 1978 Stol Air had up to six flights a day to SFO; they ended in 1979. Airline service returned to the airport in mid-1984: for less than a year, WestAir Commuter Airlines, successor to Stol Air, had eight weekday de Havilland Canada DHC-6 Twin Otters to SFO. WestAir, then independent, left Concord before becoming a United Express airline. Jet service arrived when Pacific Southwest Airlines (PSA) began nonstop BAe 146-200s to Los Angeles International Airport (LAX) on May 1, 1986. In 1988, after being acquired by USAir, PSA had four weekday BAe 146s to LAX with one continuing to San Diego. In 1991 USAir replaced the BAe 146s to LAX with USAir Express Dash 8s, then Beechcraft 1900Cs; these ended around the end of 1991. In 1991 American Eagle Airlines (Wings West Airlines) had four daily Fairchild Swearingen Metroliners to American Airlines' hub at San Jose. American later shut down its San Jose hub and American Eagle dropped Concord in 1992. Facilities Buchanan Field covers at an elevation of . It has four asphalt and concrete runways: 1L/19R is , 1R/19L is , 14L/32R is , and 14R/32L is . In the year ending February 28, 2009, the airport had 93,874 aircraft operations, an average of 257 per day: 97 percent general aviation, three percent air taxi, and less than one percent military. 387 aircraft were then based at the airport: 83 percent single-engine, 10 percent multi-engine, five percent jet, and two percent helicopter. Accidents On the evening of December 23, 1985, a Beechcraft Baron N1494G, executing a missed approach from an instrument approach (IAP) to runway 19R, lost control and crashed into the roof