sentences:  Piloting a Boeing Model 95 mail plane nicknamed the "Boeing Hornet Shuttle" on a transcontinental endurance flight eastbound from Oakland, California, he was refueled in flight by C-1s and Boeing Model 40 aircraft.Over Cleveland, Ohio, a Boeing refueling crew accidentally dropped a five-gallon can of oil through his wing, ending the first attempt.On a second attempt westbound, his engine quit over Utah when dirt clogged the fuel line, forcing him to crashland in the mountains near Salt Lake City.