Model Variants (Including Prototypes)
L-19A - Initial US Army Production Model; 2,486 examples produced; redesignated to O-1A beginning in 1962.
TL-19A - Dual Control Trainer Conversion Models from L-19A production models; redesignated to TO-1A beginning in 1962.
XL-19B - Proposed L-19B production model; fitted with 1 x Boeing XT-50-BO-1 turboprop engine of 210 shaft horsepower; single example constructed.
XL-19C - Proposed L-19C production model; fitted with 1 x Continental CAE XT51-T-1 turboprop engine of 210 shaft horsepower; 2 examples produced.
TL-19D (Cessna Model 305B) - Based on the L-19A production model; instrument trainer version; dual control cockpit; 310 examples produced; redesignated to TO-1D beginning in 1962.
L-19E (Cessna Model 305C) - Based on L-19A production model; improved form; increased gross weight; 469 examples produced; redesignated to O-1E beginning in 1962.
OE-1 - USMC model based on L-19A; 60 examples delivered; redesignated to O-1B beginning in 1962.
OE-2 (Cessna Model 321) - Revised fuselage and Cessna Model 180 wing assembly; based on the OE-1 production model; 27 examples produced; redesignated to O-1C beginning in 1962.
O-1A - 1962 Redesignation of L-19A production model.
TO-1A - Trainer conversion form of O-1A production models.
O-1B - 1962 redesignation of OE-1 production models.
O-1C - 1962 redesignation of OE-2 production models.
O-1D - Forward Air Controller conversion models from TO-1D production models; USAF usage.
TO-1D - 1962 redesignation of TL-19D production models.
O-1E - 1962 redesignation of L-19E production models.
O-1F (Cessna Model 305E) - USAF Forward Air Controller conversion models.
O-1G (Cessna Model 305D) - USAF Forward Air Controller conversion models.
CO-119 (Cessna Model L-182) - Canadian Army designation; seating for four; 1 x Continental O-470-L piston engine of 230 horsepower.
SIAI-Marchetti SM.1019 - Italian Army designation fitted with turboprop powerplant.