Appendix A Glossary

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.

Limiting fan %RPM: 104%.

Limiting ITT: 700C.

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:

Limiting fan %RPM: 104%.

Limiting ITT: 680C.

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