Aircraft Engine Controls - Cowl

Cowl

If the aircraft is equipped with adjustable Cowl Flaps:

• Cowl Flap Position Control - Cowl Flaps are opened during high power/low airspeed operations like takeoff to maximize the volume of cooling airflow over the engine's cooling fins.
• Cylinder Head Temperature Gauge - Indicates the temperature of all cylinder heads or on a single CHT system, the hottest head. A Cylinder Head Temperature Gauge has a much shorter response time than the oil temperature gauge, so it can alert the pilot to a developing cooling issue more quickly. Engine overheating may be caused by:
  1. Running too long at a high power setting.
  2. Poor leaning technique.
  3. Restricting the volume of cooling airflow too much.
  4. Insufficient delivery of lubricating oil to the engine's moving parts.