Originally Posted by
vilas
Any engine/aircraft manufacturer would define MCT as that.
Jet engine basics by Boeing on P2 page 20
Boeing jet transport performance methods states following:
From Pratt & Whitney publication "The Aircraft Gas Turbine Engine and its operation" P/No P&W 182408.
"Maximum Continuous".
This rating is the maximum thrust certified for continuous use. For the purpose of P & W service policy coverage and prolonging engine life this rating should be used, at the pilot's discretion, only when required to ensure safe flight. NOTHING ABOUT BEING RESTRICTED TO EMERGENCY SITUATIONS.
"Maximum Climb" Maximum Climb thrust is the maximum thrust approved for NORMAL climb. On some engines, Maximum Continuous and Maximum Climb thrust ARE THE SAME.
Obviously engine life will be enhanced by using the least amount of thrust required to achieve the performance required to safely operate the aircraft. As I have previously stated the parameters which impact most on engine life are
RPM and EGT. The amount of time these parameters are at a certain value determines what effect they have on the life of the engine. Most operators will stipulate permissable de-rates for take-off thrust and reduced thrust climbs, to extend overall engine life, ACCEPTING THE ADDITIONAL FUEL BURN INHERENT IN REDUCED CLIMB THRUST SETTINGS WITH THE CONSEQUENT LONGER TIME TO CLIMB.