Passage: Hartsfield–Jackson began with a five-year, rent-free lease on 287 acres (116 ha) that was an abandoned auto racetrack named The Atlanta Speedway. The lease was signed on April 16, 1925, by Mayor Walter Sims, who committed the city to develop it into an airfield. As part of the agreement, the property was renamed Candler Field after its former owner, Coca-Cola tycoon and former Atlanta mayor Asa Candler. The first flight into Candler Field was September 15, 1926, a Florida Airways mail plane flying from Jacksonville, Florida. In May 1928, Pitcairn Aviation began service to Atlanta, followed in June 1930 by Delta Air Service. Later those two airlines, now known as Eastern Air Lines and Delta Air Lines, respectively, would both use Atlanta as their chief hubs. The airport's weather station became the official location for Atlanta's weather observations September 1, 1928, and records by the National Weather Service.It was a busy airport from its inception and at the end of 1930 it was third behind New York City and Chicago for regular daily flights with sixteen arriving and departing. (In May 1931 Atlanta had four scheduled departures.) Candler Field's first control tower opened March 1939. The March 1939 Official Aviation Guide shows fourteen weekday airline departures: ten Eastern and four Delta.In October 1940, the U.S. government declared it a military airfield and the United States Army Air Forces operated Atlanta Army Airfield jointly with Candler Field. The Air Force used the airport primarily to service many types of transient combat aircraft. During World War II the airport doubled in size and set a record of 1,700 takeoffs and landings in a single day, making it the nation's busiest in terms of flight operation. Atlanta Army Airfield closed after the war.In 1942 Candler Field was renamed Atlanta Municipal Airport and by 1948, more than one million passengers passed through a war surplus hangar that served as a terminal building. Delta and Eastern had extensive networks from ATL, though Atlanta had no...

Question: What was the first plane to fly into Candler field?
Florida Airways mail plane