The IMPA Tu-Sa, (IMPA - Industrias Metalúrgicas y Plasticas Argentinas S.A.), named as Impa Tu-Sa-O in the Flight reference,[1] was a civil trainer developed in Argentina in the 1940s for aeroclub use.

It was a conventional, low-wing monoplane with wide-track fixed tailwheel undercarriage.

In service, the aircraft demonstrated a number of serious and fundamental design flaws that led to a series of accidents and pilots joking that Tu-Sa stood for Todo Un Sarcófago Aéreo ("Altogether an aerial coffin").

When it became apparent that the defects could not be corrected without a complete redesign of the aircraft, they were withdrawn from use.

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