We hold the worldwide inventory of PT6A-21 engines so that you don’t have to call every PT6 vendor to get the same info that we have in one place! Check them out in the list below.

The PT6A-21 engines are small-series turboprop aircraft engines built by Pratt & Whitney Canada.


No time to talk on the phone? No problem. Fill out the form below with the particular engine you are interested in and we will get back to you as soon as possible.

PT6A-21 For Sale

We currently have many PT6A-21 for sale. These engines are from trusted vendors who use us specifically to sell their engines. Although we do not hold the inventory ourselves, we help you by holding an inventory from vendors all over the world! Some of these vendors come to us in order to get their engines on the internet before they even hit their own websites. The goal of Turbine Options is to create the best possible situation for you and your purchasing needs. If you happen to own a PT6A-21 engine that you would like to sell, give us a call us and we will put you in our inventory.

Give Us A Call

If the engine you are looking for is not in the list above, we still encourage you to give us a call. We hear about new engines every day and if our inventory does not currently hold it, we will place you on a watchlist and notify you immediately when we find an engine that fits your requirements. If you are inquiring about an exchange, we can take your core engine and the price of a new, mid-time, or high-time engine down!


The PT6A-21 turbine engine is a small-series turboprop aircraft engine. It is a slight variation of the PT6 Pratt & Whitney Canada engine. Intended use of the PT6A-21 is for the Beechcraft King Air C90A/B/SE and the Beechcraft Air Bonanza. The PT6A-21 shaft horsepower is 550 shp and equivalent shaft horsepower is 580 eshp. The propeller shaft design speed is 2200 RPM and the propeller shaft rotation is clockwise.

PT6A-21 Applications

The PT6A-21 airframe applications also include the Royal Turbine Duke and the Evektor EV-55 Outback. It’s TBO is 3600 and it’s HSI is 1800. This engine is a free turbine turboprop propulsion engine. It incorporates a multi-stage compressor, driven by a single stage turbine and a single stage free turbine. The single stage free turbine drives the propeller shaft through planetary reduction gearing.