Transcontinental & Western Air    Stearman-Northrop Alpha 4-A   NC994Y     (c/n  17)

                              

                                  The Stearman-Northrop Alpha 4-A was a single seat low wing all metal monoplane specifically
                                  modified (from the Alpha 4) as an air-express mail plane. TWA had eight of them.  Except for                  
                                  the prototype (NC127W) all the rest were modified by Stearman in Wichita, Kansas.  They were
                                  used by TWA for the shipment of perishables (such as flowers and medical equipment) on coast
                                  to coast schedules, and served the airline well until 1935 when their duties were taken over by
                                  DC-2s..