The prototype was first flown in February 1931 in Warsaw by Puławski, in a land configuration (without auxiliary floats).

During the sixth flight on 21 March 1931, right after take-off, the plane stalled due to strong wind and crashed in Warsaw, killing Puławski.

The death of this talented designer of fighter aircraft was recognized as a heavy blow to the Polish Air Force capabilities.

Two-spar trapezoid wings with rounded ends, of wooden construction, plywood and canvas covered.

Fuel tank 100 L. Data from Polish Aircraft 1893–1939,[1] Poser : PZL 12[2]General characteristics Performance