|Role||STOL liaison monoplane|
|First flight||24 May 1969|
|Primary user||Italian Army|
|Developed from||Cessna O-1 Bird Dog|
To meet an Italian Army requirement for a short take-off liaison aircraft, SIAI-Marchetti modified the design of the Cessna 305A/O-1 Bird Dog with a new turboprop engine and a revised tail unit. The prototype first flew on 24 May 1969 powered by a 317 hp (236 kW) Allison 250-B15C turboprop engine. It was evaluated against the Aermacchi AM.3 and was successful and won a production order for 80 aircraft.
- Prototype with 317hp (236kW) Allison 250-B15C turboprop engine, one built.
- Production with 317hp (236kW) Allison 250-B15G 400hp turboprop engine derated to 317hp, 81 built.
- Production variant with 400hp (298kW) Allison 250-B17B turboprop engine, designated SM.1019E.I by the Italian Army,:Four-built.
- SM.1019A on display at Museo Parco Velivoli Storici, San Possidonio, Italy.
- SM.1019A on display at Museo Storico della Motorizzazione Militare, Rome, Italy.
- SM.1019 serial number 009, airworthy and regularly flying in Australia, registration VH-PAC.
- SM.1019 serial number 012, N992BB, airworthy and regularly flying in US (seen at AirVenture 2015)
Data from Jane's All The World's Aircraft 1976-77 
- Crew: 2
- Length: 8.52 m (27 ft 11½ in)
- Wingspan: 10.97 m (36 ft 0 in)
- Height: 2.86 m (9 ft 4½ in)
- Wing area: 16.16 m2 (174 ft2)
- Aspect ratio: 7.45
- Empty weight: 690 kg (1,521 lb)
- Gross weight: 1,450 kg (3,196 lb)
- Powerplant: 1 × Allison 250-B17B turboprop engine, 298 kW (400 hp) each
- Maximum speed: 285 km/h (177 mph)
- Cruising speed: 281 km/h (175 mph)
- Range: 1,340 km (832 miles)
- Endurance: 8 hours 45 min
- Service ceiling: 7,620 m (25,000 ft)
- 320kg (705lb) of underwing stores
- Related development
- Aircraft of comparable role, configuration and era
- Taylor, John W.R. (1976). Jane's All The World's Aircraft 1976-77. London: Jane's Yearbooks. ISBN 0-354-00538-3.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing. p. 2856.
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