Abstract :
Recirculation fan is the most important component in ATR 72-600 aircraft which has the function to circulate the air inside the cabin. Recirculation fan is included in air conditioning systems on ATR 72-600 aircraft. The air inside the cabin must be circulated so that the air that has been used is replaced with clean air. Damage to the fan recirculation component causes the air to be in the cabin is not circulated properly. Indicators and controls of recirculation fan are at the overhead panels in the cockpit. To overcome troubleshoot from recirculation fan there are several steps to be done that is: identification, testing, and checking of the electrical current used. Trouble that occurs in the form of an indicator light "FAULT" in control panel recirculation the left fan on the cockpit lit. The troubleshooting process is done by replacing the recirculation fan component that is broken with a fan recirculation component that is serviceable with the same part number. After troubleshooting and re-testing of the new recirculation fan component, the "FAULT" indicator light on the recirculation panel controls the left fan of the dead condition. It signifies that the recirculation fan component is already serviceable and reusable