Flying Wild is a 1941 film and the fifth installment of the East Side Kids series with location scenes shot at the Alhambra, California airport.
One day, when Toms plane crashes onto the plant airstrip, Reynolds suspects that the crash may have been the work of saboteurs. Later, on the airfield tarmac, Muggs jokingly appoints himself as the new operator of Dr. Richard Nagel George Pembrokes flying ambulance plane and gives his pals a tour of the aircraft. Their playful games are soon brought to a halt by Nagel, the secret leader of a spy ring, who catches the boys on his plane and angrily orders them off.Mr. Reynolds, certain that spies are working at the plant, asks Danny to act as a decoy so that the spies can be identified, and has him deliver to a downtown office a fake set of plans for a new bomb site. As Reynolds predicted, Nagels men ambush Danny on his way to the office, but the plan goes awry when the detectives sent to trail Danny lose him. Danny eventually turns up unharmed some time later. When Muggs reports to Reynolds his suspicions that Nagel is behind the espionage ring, Reynolds dismisses the accusation as a product of the boys imagination. ........
Source: Wikipedia