Landing Gear Circuit
- This circuit is usually found on light aircraft that have high performance and this circuit operates the retractable landing gear systems, these type of aircraft is work with a hydraulic system to move the gear, for example during the takeoff the pilot moves the gear position switch to retract position and then starting an electric motor, this motor operates hydraulic pump and all this hydraulic system move the landing gear.
- These six switches are divided the three-down limit switches are used to detect when the gear reaches the fully extended position down and the other three up limit switches are used to detect the gear reaches the full retract position up, all those switches are activated by a component of landing gear assembly when a gear is reached to the limit.
- The pilot needs indication to provided that the gear is safe position for landing, most aircraft have a series of three green lights when the three gear is down and locked in the landing gear position, those three light is activated by up and down limit switch found in the gear wheel well.