What was found
NR 2 ENGINE FIRE WARNING LIGHT CAME ON DURING CLIMB, CREW DECLARED AN EMERGENCY AND RETURNED TO STATION. SUSPECT INDICATION PROBLEM. FOUND FIRE DETECTOR MOUNTED UNDER THE OIL COOLER AT THE FIRE WALL WITH A LOOSE CENTER CONNECTOR, ALLOWING THE CERAMIC CENTER TO SHIFT AND GO TO GROUND. TIGHTENED CENTER CONNECTOR AND INSTALLED SECOND NUT AS A SAFETY. SYSTEM OPS CHECKED GOOD. (M)