For the #1 engine, the TGT limiting range corresponds to which duration?

For the #1 engine, the TGT limiting range corresponds to which duration?

• A. 1 Minute Limit
• B. 2.5 Minute Limit
• C. 4 Minute Limit
• D. 6 Minute Limit

Answer: (B)

Turbine Gas Temperature (TGT) is monitored to protect the turbine from overheating. The engine limits include time allowances for how long you can stay in a high-TGT condition. For the #1 engine, the duration you can operate in that high-TGT limiting range is two and a half minutes. This limit exists because sustained high temperatures increase thermal stress on the turbine blades and hot sections, risking damage or reduced engine life. When you approach this limit, you should adjust power or reduce the temperature so you don’t exceed the allowable time. The other durations correspond to different TGT bands, but the specification for this engine’s high-TGT limiting range is two and a half minutes.

Turbine Gas Temperature (TGT) is monitored to protect the turbine from overheating. The engine limits include time allowances for how long you can stay in a high-TGT condition. For the #1 engine, the duration you can operate in that high-TGT limiting range is two and a half minutes. This limit exists because sustained high temperatures increase thermal stress on the turbine blades and hot sections, risking damage or reduced engine life. When you approach this limit, you should adjust power or reduce the temperature so you don’t exceed the allowable time. The other durations correspond to different TGT bands, but the specification for this engine’s high-TGT limiting range is two and a half minutes.