The CASA I.131E Jungmann two-seat biplane is a trainer evolved from the license built Bücker
Bü.131A Jungmann. Bücker Flugzeugbau was founded by Carl Bücker in 1932. Their first design was
the Bü.131A Jungmann powered by a 4 cylinder Hirth in line engine. The prototype "D-3150"
flew first 27 April 1934. The Jungmann was ordered by the Deutsche Luftsport Verband and used as a
trainer for the Luftwaffe. The Bü.131 was built under license in Japan, Switzerland, Czechoslovakia and Spain.
In Spain production started 1938 and the CASA I-131 remained in production with the Construcciones
Aeronàuticas Sociedad Anonima (C.A.S.A.) till the end of the fifties. The ICAO Aircraft Type Designator
for the CASA I.131E Jungmann is BU31.
C.A.S.A. I.131-E Jungmann s/n 2194 was original built in 1957 for the Ejército del Aire Español - Spanish Air Force - and registered E.3B-574.
The aircraft was fitted by CASA with an ENMA Tigre G-IV-Ax engine. In service with the Spanish Air Force the Jungmann was used as a training aircraft.
After being withdrawn from service in the Spanish Air Force the aircraft was registered I-OPEF with Maurizio Steffanini in Novara, Italy.
On 22 July 2011, registration I-OPEF was cancelled as exported to Germany and the Jungmann was registered D-EJMI. CASA I.131E Jungmann D-EJMI is operated
in the Spanish Air Force colours as E-3B-574 '781-34' and based at Flugplatz Oldenburg-Hatten (EDWH).