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APPENDIX A
GLOSSARY
A100. ENGINE DATA DEFINITIONS
Takeoff Rated Thrust
Takeoff Rated Thrust (TRT) is the maximum allowable thrust (determined by fan speed, %N1).
It varies with pressure altitude, ram air temperature, and engine bleed. Operation at TRT is
limited to 5 minutes. Refer to Limitations, Section V, T.O. 1T-1A-1 for the TRT value, and for
turbine speed (%N2), oil pressure, and oil temperature limits.
Depending on the operating conditions, the %N1 for TRT will be defined by one of the following
engine limitations.
1.
Limiting fan %RPM: 104%.
Limiting ITT: 700C.
2.
3.
Limiting gross thrust: 2900 lbs.
The %Nl limit annotated by a specific bleed air configuration (such as ACM ON, ALL ANTI-
ICE OFF) is defined by the ITT limit.
At pressure attitudes above 8000 feet, TRT is based on the %N1 is limited by a specific bleed air
configuration (ITT) limit or limiting fan %RPM (104%), depending on temperature.
Maximum Continuous Thrust
Maximum Continuous Thrust (MCT) is the maximum allowable thrust (determined by fan speed,
%N1) that may be used without a time limitation. MCT varies with pressure altitude, ram air
temperature, and engine bleed air usage and is normally used for climbing flight.
Depending upon the operation conditions, the %N1, for MCT will be defined by one of the
following engine limitations:
1.
Limiting fan %RPM: 104%.
Limiting ITT: 680C.
2.
3.
Limiting gross thrust: 2900 lbs.
Refer to Limitations, Section V, T.O. 1T-1A-1 for turbine speed (%N2), oil pressure, and oil
temperature limits.
GLOSSARY A-1


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