Engine Cooling Systems (1) Some aircraft exhaust systems include an augmenter system to draw additional air over the engine for cooling. (2) Augmenter systems are used to create a low pressure area at the lower rear of the aircraft engine cowling. Regarding the above statements, a. only No. 1 is true. b. both No. 1 and No. 2 are true. c. only No. 2 is true.