This specific meter is used to indicate the position of the engine cowl flaps on a four-engine aircraft. If you’re wondering what engine cowl flaps are, the Aircraft Owners and Pilots Association hasa brief explanation: “Cowl flaps are small doors located in the bottom of the engine cowling...
subjected to temperatures which are liable to exceed those permitted by this equipment. This problem notably arises when taxiing when the airplane is being maneuvered on the ground. Specifically, whereas the equipment is sufficiently ventilated when the aircraft is in flight, on the ground the volum...