Which variable indicates a compressor stall in the TH-73A?

Which variable indicates a compressor stall in the TH-73A?

• A. High fuel level
• B. Abnormal ITT readings
• C. Increasing torque
• D. Stable N1 readings

Answer: (B)

The variable that indicates a compressor stall in the TH-73A is abnormal ITT (Interstage Turbine Temperature) readings. When a compressor experiences a stall, it fails to maintain proper airflow through the engine, which can lead to various changes in operational parameters. One of the primary indicators of this phenomenon is a significant rise in ITT, as the engine may produce excessive temperature due to inefficient combustion processes or poor airflow. High ITT readings can signify that the engine is operating outside its normal performance parameters, which often accompanies a stall condition. Monitoring this variable is crucial because it allows the pilot or technician to diagnose potential issues with the engine performance and take corrective actions to ensure the safe operation of the aircraft. The other options do not directly relate to compressor stall indications: high fuel levels pertain to fuel management, increasing torque relates to power output without specifically indicating a stall condition, and stable N1 readings suggest the engine is functioning normally at a set speed, which would not typically show signs of compressor stall. Therefore, the abnormal ITT readings are the critical variable for identifying this issue.

The variable that indicates a compressor stall in the TH-73A is abnormal ITT (Interstage Turbine Temperature) readings. When a compressor experiences a stall, it fails to maintain proper airflow through the engine, which can lead to various changes in operational parameters. One of the primary indicators of this phenomenon is a significant rise in ITT, as the engine may produce excessive temperature due to inefficient combustion processes or poor airflow.

High ITT readings can signify that the engine is operating outside its normal performance parameters, which often accompanies a stall condition. Monitoring this variable is crucial because it allows the pilot or technician to diagnose potential issues with the engine performance and take corrective actions to ensure the safe operation of the aircraft.

The other options do not directly relate to compressor stall indications: high fuel levels pertain to fuel management, increasing torque relates to power output without specifically indicating a stall condition, and stable N1 readings suggest the engine is functioning normally at a set speed, which would not typically show signs of compressor stall. Therefore, the abnormal ITT readings are the critical variable for identifying this issue.