Specialist service

Measurable performance - industry recognised EGT margins

Up to 15˚C higher than industry standard

EGT refers to Exhaust Gas Temperature, it is a measure of the performance efficiency of the engine to produce the designed level of thrust. During certification every engine is assigned an absolute operating limit – EGT red line. The difference between EGT red line and the gauge reading in the cockpit is the EGT margin. It is industry-recognised that Aero Norway provides customers with best-in-class EGT margins across the CFM56 family of engines.

In order to achieve this, there are ten basic rules that we abide by to sustain performance results:

  • Tooling quality and routine checks. (Scheduled measuring of critical fixtures.)
  • Shop practice and machining of honeycomb seal, HPT and HPC blades. (Custom grinding.)
  • Training and information – continuous pursuit of best-practice.
  • Introduction of recommended Service Bulletins. (HPC, HPT Nozzle/HPT Blades/Comb.ch. and HPT Shroud are key areas for performance optimisation.)
  • Selection of the right parts. (Inherent component quality is returned after Aero Norway managed repair.)
  • Cleanliness in the shop.
  • Engine testing after shop visit. (Following OEM recommendations.)
  • Aero Norway Engine Maintenance Programme. (Application of ‘Aero Norway standard’ limits whilst recognising the shop-manual limits.)
  • Borescope inspection after test. (Record HPC blade tip rub and HPT/Shroud rub.)
  • De-briefing: CESM 035.

Reduced costs and improved reliability

The greater the EGT margin achieved, the healthier the engine. From a commercial perspective Aero Norway’s customers’ engines will last longer on wing, and the engine components, especially in the hot section, will remain in better condition.