1- From “single seat – bomber fighter” (A-0) to “double seat – trainer plane” (A-12).
2- Front seat (with ejection seat) almost unchanged, back seat (no ejection seat) replacing the fuselage fuel tank installed behind the front seat.
3- Rear instrument panel simplified, with only minimal instrumentation.
CANOPY & SURROUNDING DETAILS
4- Shape of the upper fuselage very different due to the lump-like canopy of the backseat and its fairing.
5- Square panel for rear engine inspection on the back of the backseat canopy on the right side of the fuselage.
6- Foothold to get in/off, added on the underside of the backseat canopy on the left side of the fuselage.