AlliedSignal Aerospace plans to introduce a TFE731-3D engine upgrade based on the -3C modification now offered on the Cessna Citation III and VI.
The -3D upgrade is aimed at improving engine durability and cutting maintenance costs by increasing turbine-inlet temperature margins by more than 15°C. Thrust and fuel consumption will be unchanged by the modification which introduces new temperature-resistant materials into the hot section. The -3D upgrade is available from May at the time of either a major periodic inspection, or a core-zone inspection.
Garrett Aviation Services has obtained the supplemental type certificate for the upgrade on the Dassault Falcon 50 and Raytheon Hawker 400, 600 and 700 under contract to AlliedSignal.
Source: Flight International
