The T406/AE1107C Liberty shares a common core with the AE 3007 and AE 2100 series of engines.
The V-22's T406 powerplants are housed in wing-tip tilting nacelles, allowing the distinctive flight characteristics of the V-22. For take off and landing the nacelles are directed vertically (90° to fuselage), while for forward flight they are rotated parallel to fuselage. The engine has been considered as a cost-effective upgrade for existing heavylift helicopters such as the CH-47 Chinook and the CH-53.
In 2009 the GAO found that the engines failed after less than 400 hours of service, as compared to the estimated life of 500-600 hours. Multiple updates to the engine platform in 2012-2013 have increased the lifespan significantly.
In April 2012, the DoD ordered 70 AE 1107C engines for the Osprey, with options for up to 268 engines.
Engines with a future block 4 upgrade are expected to deliver ten thousand horsepower.