Pratt & Whitney has delivered eight engines so far to the Bombardier CSeries flight test programme, says Andrew Tanner, vice-president of PW1000G programmes.
Three sets of engines have already been installed on the first three flight test vehicles, Tanner says.
Two more engines are waiting to be installed on the fourth CS100 flight test vehicle, he adds.
Bombardier is building five test aircraft for the CS100 certification with Transport Canada and two CS300 test aircraft.
P&W will deliver the first two engines for the CS300 in the first quarter next year, Tanner adds.
P&W certificated the PW1524G turbofan, which includes the fan-drive gear system, in February. It is the first example to enter a flight test programme on a test aircraft in the PW1000G series, which includes variants for Airbus, Embraer, Irkut and Mitsubishi regional jets and narrowbodies.
All PW1524G engines delivered to Bombardier to date were assembled and tested at a new factory in Mirabel, Canada, which is near the final assembly line for the CSeries aircraft.