Fournier set up his own factory at Nitray, near Tours to manufacture the design, but after only around 40 had been built, the exercise proved financially unviable, and he was forced to close down production.

The earliest examples, the T67A, were virtually identical to the Fournier-built aircraft, but the design was soon revised to replace the wooden structure with one of composite material.

The Slingsby T67M, aimed at the military (hence "M") training market, was the first to include a constant-speed propeller and inverted fuel and oil systems.

The Firefly was selected in 1992 to replace the T-41 aircraft for the command's Enhanced Flight Screening Program, which would include aerobatic maneuvers.

The type was meant to not only replace the Cessna T-41 introductory trainer, but also to meet the Enhanced Flight Screening Program (EFSP) requirements.

[5] In December 2012, the National Flying Laboratory Centre at Cranfield University in the UK acquired a T67M260 to supplement its Scottish Aviation Bulldog aerobatic trainer for MSc student flight experience and training.

[6] The Firefly is used by the Royal Netherlands Air Force during pilot selection which is contracted out to TTC at Seppe Airport.

[citation needed] The Firefly was used as a basic military trainer in the United Kingdom until spring 2010, when they were replaced by Grob Tutor aircraft.