Chuck,
Not much in the internet, but I did come up with the following which disagrees with your statement:
The first two for Pan Am, later scrapped, were ….. “Designated the Model A-942, it was of a mixed metal and fabric construction with a high wing, and was powered by a 9 cylinder, Pratt & Whitney S2E-G Hornet engine developing 800 hp.”
“Of the four remaining airframes under construction, one was completed as a A-942-A model, the last three being completed as A-942-B aircraft, that differed in being powered by the Wright Cyclone GR-1820-F52 9 cylinder radial engine that developed 875 hp. Of these four aircraft, two were sold to the Imperial Japanese Navy Air Force, the other two aircraft being sold to private interests.“