My grandpa is the tallest one in uniform. He is standing beside a CMASA (FIAT) G.8 biplane.
My grandpa is leaning on Breda Ba.39 or Ba33. The aircraft on the right is a Caproni Ca.113.
Vicenza, Italy 1936: a Savoia Marchetti SM.81 "Pipistrello" (Bat) has crashed. It is finished in Bianco Avorio 11 (Ivory White 11), as it was customary for trainers of this kind. Mr. Giuseppe Versolato kindly sent me more information about this aircraft: it belonged to the 14th Stormo Bombardieri Terrestri (Land Bombers), which was the first unit to come to Vicenza to a new airfield still under work. Official inauguration of the airfield was MArch 1939. The aircraft had French engines, Gome Rhone K14, which did not enjoy much success and were later replaced with Alfa Romeo.
Another picture of the same aircraft.
And another one
Mechanics at work on the crashed Pipistrello