At the start of the film when the airliner is shown crashing the model is of a conventional small twin-engined airliner. In the live action shots after the crash it has the unusual twin horizontal tail structures supported by several vertical surfaces of the Capelis XC-12, also used in Five Came Back (1939).
When the bad guys take off in their car just after picking up the money by the water fountain, a cameraman or crew member is reflected in the driver's window.