What was found
(CAN) DURING AN INSPECTION ON THE AIRCRAFT, THE COCKPIT HEADLINER WAS REMOVED TO ACCESS THE G-SWITCH FOR A FUNCTIONAL CHECK. ONCE THE HEADLINER PANEL WAS REMOVED A SECTION OF INSULATION THAT WAS NEXT TO THE MAP LIGHT FOR THE CO-PILOT WAS FOUND SCORCHED AND BRITTLE FROM CONTACT WITH THE BACK OF THE LIGHT ASSEMBLY. THE INSULATION WAS REMOVED AND THE PANEL REINSTALLED AND THE AIRCRAFT WAS RETURNED TO SERVICE.