Developed on behalf of Deutsche Luft Hansa aircraft was a monoplane in light metal construction and was powered by a BMW VIa engine with 500 hp.
The first prototype crashed due to breakage of the tail during the first flight on February 26, 1928 (see also: History of Lufthansa - 1929). Here, the Lufthansa pilot Hans Hack Mack was killed.
Lufthansa took over in 1929 two aircraft in 1930 and another aircraft chartered by the DVS an airplane. Four more aircraft were delivered by April 1931.
On October 6, 1930, D- 1930 crashed near Dresden during landing due to wind gusts from. The two -man crew and six passengers were killed. On April 14, 1931, D- 1928 at Rietschen crashed in Upper Lusatia, where the two -man crew was killed and seven passengers were injured. Reason was a fraction of the tail, whereupon the Lufthansa placed the airplane type immediately removed from service.
The other aircraft ordered did not take the DLH on the BFW, which led to a lawsuit. Since the DLH not paid the already built aircraft, this contributed to the bankruptcy of the Bayerische Flugzeugwerke. Only in September and October 1932, the last six aircraft were delivered. After that, the M20 was also reinstated in the distances.
From 1933 to 1935 she was one of the main pattern of DLH, until it was replaced by the Junkers Ju 52/3m. Five aircraft were chartered from 1935 to 1937 in the Air Force. After 1935, the aircraft was increasingly used in other consumer traffic, including at the DLH 's subsidiary Hansa flight service.
When the war started, the aircraft were chartered to the Air Force, where they all were scrapped by 1943. Overall, the DLH 14 M20, 13 of which had its own aircraft. A total of 4.1 million kilometers were flown with the M20 at the DLH, of which 3.75 million km in regular service.